4!28-1 trivally factors prime!: 3 (digits:1)
6!28-1 trivally factors prime!: 5 (digits:1)
8!28-1 trivally factors prime!: 7 (digits:1)
12!28-1 trivally factors prime!: 11 (digits:2)
14!28-1 trivally factors prime!: 13 (digits:2)
18!28-1 trivally factors prime!: 17 (digits:2)
20!28-1 trivally factors prime!: 19 (digits:2)
24!28-1 trivally factors prime!: 23 (digits:2)
30!28-1 trivally factors prime!: 59 (digits:2)
32!28-1 trivally factors prime!: 127 (digits:3)
38!28-1 trivally factors prime!: 379 (digits:3)
40!28-1 trivally factors prime!: 479 (digits:3)
42!28-1 trivally factors prime!: 587 (digits:3)
46!28-1 trivally factors prime!: 827 (digits:3)
56!28-1 trivally factors prime!: 1567 (digits:4)
62!28-1 trivally factors prime!: 12647 (digits:5)
76!28-1 trivally factors prime!: 72959 (digits:5)
80!28-1 trivally factors prime!: 99839 (digits:5)
82!28-1 trivally factors prime!: 115127 (digits:6)
84!28-1 trivally factors prime!: 131711 (digits:6)
88!28-1 trivally factors prime!: 675839 (digits:6)
96!28-1 trivally factors prime!: 3133439 (digits:7)
102!28-1 trivally factors prime!: 6249743 (digits:7)
110!28-1 trivally factors prime!: 12664079 (digits:8)
112!28-1 trivally factors prime!: 14751743 (digits:8)
128!28-1 trivally factors prime!: 648806399 (digits:9)
130!28-1 trivally factors prime!: 812466719 (digits:9)
132!28-1 trivally factors prime!: 1001594879 (digits:10)
138!28-1 trivally factors prime!: 1747643039 (digits:10)

 Primality testing 170!28-1 [N-1, Brillhart-Lehmer-Selfridge]
 170!28-1 is prime! (0.0227s+0.0009s)(digits:12)

 Primality testing 182!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 17
 Running N+1 test using discriminant 29, base 1+sqrt(29)
 Running N+1 test using discriminant 29, base 2+sqrt(29)
 Calling N+1 BLS with factored part 100.00% and helper 11.63% (316.28% proof)
 182!28-1 is prime! (0.0484s+0.0056s)(digits:14)

 Primality testing 200!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 13, base 1+sqrt(13)
 Running N+1 test using discriminant 13, base 2+sqrt(13)
 Calling N+1 BLS with factored part 100.00% and helper 6.25% (310.42% proof)
 200!28-1 is prime! (0.0283s+0.0008s)(digits:15)

 Primality testing 220!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 19, base 1+sqrt(19)
 Running N+1 test using discriminant 19, base 2+sqrt(19)
 Calling N+1 BLS with factored part 100.00% and helper 5.66% (307.55% proof)
 220!28-1 is prime! (0.0284s+0.0007s)(digits:17)

 Primality testing 254!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 13, base 1+sqrt(13)
 Running N+1 test using discriminant 13, base 2+sqrt(13)
 Calling N+1 BLS with factored part 100.00% and helper 14.29% (314.29% proof)
 254!28-1 is prime! (0.0274s+0.0007s)(digits:19)

 Primality testing 270!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 19
 Running N+1 test using discriminant 47, base 1+sqrt(47)
 Running N+1 test using discriminant 47, base 2+sqrt(47)
 Calling N+1 BLS with factored part 100.00% and helper 32.35% (333.82% proof)
 270!28-1 is prime! (0.0276s+0.0008s)(digits:21)

 Primality testing 278!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 17, base 1+sqrt(17)
 Running N+1 test using discriminant 17, base 2+sqrt(17)
 Calling N+1 BLS with factored part 100.00% and helper 23.19% (326.09% proof)
 278!28-1 is prime! (0.0275s+0.0007s)(digits:21)

 Primality testing 282!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 13
 Running N+1 test using discriminant 37, base 1+sqrt(37)
 Running N+1 test using discriminant 37, base 2+sqrt(37)
 Calling N+1 BLS with factored part 100.00% and helper 1.41% (301.41% proof)
 282!28-1 is prime! (0.0289s+0.0007s)(digits:22)

 Primality testing 298!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 19, base 1+sqrt(19)
 Running N+1 test using discriminant 19, base 2+sqrt(19)
 Calling N+1 BLS with factored part 100.00% and helper 17.11% (318.42% proof)
 298!28-1 is prime! (0.0278s+0.0007s)(digits:23)

 Primality testing 300!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 23
 Running N+1 test using discriminant 79, base 1+sqrt(79)
 Running N+1 test using discriminant 79, base 2+sqrt(79)
 Calling N+1 BLS with factored part 100.00% and helper 1.32% (303.95% proof)
 300!28-1 is prime! (0.0273s+0.0007s)(digits:24)

 Primality testing 338!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 37, base 1+sqrt(37)
 Running N+1 test using discriminant 37, base 2+sqrt(37)
 Calling N+1 BLS with factored part 100.00% and helper 27.59% (329.89% proof)
 338!28-1 is prime! (0.0283s+0.0006s)(digits:27)

 Primality testing 342!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 37
 Running N+1 test using discriminant 61, base 1+sqrt(61)
 Running N+1 test using discriminant 61, base 2+sqrt(61)
 Calling N+1 BLS with factored part 100.00% and helper 1.11% (301.11% proof)
 342!28-1 is prime! (0.0283s+0.0008s)(digits:28)

 Primality testing 346!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 17, base 1+sqrt(17)
 Running N+1 test using discriminant 17, base 2+sqrt(17)
 Calling N+1 BLS with factored part 100.00% and helper 5.49% (306.59% proof)
 346!28-1 is prime! (0.0284s+0.0007s)(digits:28)

 Primality testing 424!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 31
 Running N+1 test using discriminant 41, base 1+sqrt(41)
 Running N+1 test using discriminant 41, base 2+sqrt(41)
 Calling N+1 BLS with factored part 100.00% and helper 11.30% (311.30% proof)
 424!28-1 is prime! (0.0283s+0.0007s)(digits:35)

 Primality testing 476!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 19
 Running N+1 test using discriminant 41, base 1+sqrt(41)
 Running N+1 test using discriminant 41, base 2+sqrt(41)
 Calling N+1 BLS with factored part 100.00% and helper 13.85% (313.85% proof)
 476!28-1 is prime! (0.0277s+0.0007s)(digits:40)

 Primality testing 508!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 31
 Running N+1 test using discriminant 41, base 1+sqrt(41)
 Running N+1 test using discriminant 41, base 2+sqrt(41)
 Calling N+1 BLS with factored part 100.00% and helper 0.71% (302.13% proof)
 508!28-1 is prime! (0.0287s+0.0006s)(digits:43)

 Primality testing 520!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N-1 test using base 31
 Running N+1 test using discriminant 43, base 2+sqrt(43)
 Running N+1 test using discriminant 43, base 3+sqrt(43)
 Calling N+1 BLS with factored part 100.00% and helper 40.00% (341.38% proof)
 520!28-1 is prime! (0.0300s+0.0007s)(digits:44)

 Primality testing 574!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 43
 Running N+1 test using discriminant 59, base 1+sqrt(59)
 Running N+1 test using discriminant 59, base 2+sqrt(59)
 Calling N+1 BLS with factored part 100.00% and helper 19.02% (319.63% proof)
 574!28-1 is prime! (0.0291s+0.0006s)(digits:50)

 Primality testing 598!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 37
 Running N+1 test using discriminant 59, base 1+sqrt(59)
 Running N+1 test using discriminant 59, base 2+sqrt(59)
 Calling N+1 BLS with factored part 100.00% and helper 0.58% (301.17% proof)
 598!28-1 is prime! (0.0308s+0.0007s)(digits:52)

 Primality testing 618!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 67
 Running N+1 test using discriminant 73, base 1+sqrt(73)
 Running N+1 test using discriminant 73, base 2+sqrt(73)
 Calling N+1 BLS with factored part 100.00% and helper 7.34% (307.91% proof)
 618!28-1 is prime! (0.0315s+0.0007s)(digits:54)

 Primality testing 688!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N-1 test using base 47
 Running N+1 test using discriminant 71, base 2+sqrt(71)
 Running N+1 test using discriminant 71, base 3+sqrt(71)
 Calling N+1 BLS with factored part 100.00% and helper 5.97% (305.97% proof)
 688!28-1 is prime! (0.0315s+0.0007s)(digits:61)

 Primality testing 700!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 31
 Running N+1 test using discriminant 43, base 1+sqrt(43)
 Running N+1 test using discriminant 43, base 2+sqrt(43)
 Calling N+1 BLS with factored part 100.00% and helper 0.49% (301.48% proof)
 700!28-1 is prime! (0.0293s+0.0008s)(digits:62)

 Primality testing 710!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 83, base 1+sqrt(83)
 Running N+1 test using discriminant 83, base 2+sqrt(83)
 Calling N+1 BLS with factored part 100.00% and helper 7.66% (307.66% proof)
 710!28-1 is prime! (0.0325s+0.0007s)(digits:63)

 Primality testing 714!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 53
 Running N+1 test using discriminant 61, base 1+sqrt(61)
 Running N+1 test using discriminant 61, base 2+sqrt(61)
 Calling N+1 BLS with factored part 100.00% and helper 3.33% (303.81% proof)
 714!28-1 is prime! (0.0311s+0.0009s)(digits:64)

 Primality testing 752!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 67
 Running N+1 test using discriminant 79, base 1+sqrt(79)
 Running N+1 test using discriminant 79, base 2+sqrt(79)
 Calling N+1 BLS with factored part 100.00% and helper 11.26% (311.26% proof)
 752!28-1 is prime! (0.0319s+0.0007s)(digits:67)

 Primality testing 758!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 37, base 1+sqrt(37)
 Running N+1 test using discriminant 37, base 2+sqrt(37)
 Calling N+1 BLS with factored part 100.00% and helper 5.80% (306.25% proof)
 758!28-1 is prime! (0.0331s+0.0007s)(digits:68)

 Primality testing 804!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 37
 Running N+1 test using discriminant 43, base 1+sqrt(43)
 Running N+1 test using discriminant 43, base 2+sqrt(43)
 Calling N+1 BLS with factored part 100.00% and helper 0.42% (300.83% proof)
 804!28-1 is prime! (0.0318s+0.0006s)(digits:73)

 Primality testing 840!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 41
 Running N+1 test using discriminant 79, base 1+sqrt(79)
 Running N+1 test using discriminant 79, base 2+sqrt(79)
 Calling N+1 BLS with factored part 100.00% and helper 0.40% (301.20% proof)
 840!28-1 is prime! (0.0301s+0.0007s)(digits:76)

 Primality testing 846!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 41
 Running N+1 test using discriminant 53, base 1+sqrt(53)
 Running N+1 test using discriminant 53, base 2+sqrt(53)
 Calling N+1 BLS with factored part 100.00% and helper 5.49% (306.67% proof)
 846!28-1 is prime! (0.0343s+0.0007s)(digits:77)

 Primality testing 850!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 37, base 1+sqrt(37)
 Running N+1 test using discriminant 37, base 2+sqrt(37)
 Calling N+1 BLS with factored part 100.00% and helper 5.45% (305.84% proof)
 850!28-1 is prime! (0.0344s+0.0007s)(digits:78)

 Primality testing 906!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 37
 Running N+1 test using discriminant 59, base 1+sqrt(59)
 Running N+1 test using discriminant 59, base 2+sqrt(59)
 Calling N+1 BLS with factored part 100.00% and helper 5.80% (306.52% proof)
 906!28-1 is prime! (0.0371s+0.0009s)(digits:84)

 Primality testing 950!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 43, base 2+sqrt(43)
 Running N+1 test using discriminant 43, base 3+sqrt(43)
 Calling N+1 BLS with factored part 100.00% and helper 3.79% (304.48% proof)
 950!28-1 is prime! (0.0353s+0.0007s)(digits:88)

 Primality testing 1012!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 59
 Running N+1 test using discriminant 73, base 1+sqrt(73)
 Running N+1 test using discriminant 73, base 2+sqrt(73)
 Calling N+1 BLS with factored part 100.00% and helper 0.32% (300.96% proof)
 1012!28-1 is prime! (0.0364s+0.0007s)(digits:95)

 Primality testing 1074!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 59
 Running N+1 test using discriminant 79, base 1+sqrt(79)
 Running N+1 test using discriminant 79, base 2+sqrt(79)
 Calling N+1 BLS with factored part 100.00% and helper 9.23% (309.52% proof)
 1074!28-1 is prime! (0.0399s+0.0008s)(digits:102)

 Primality testing 1188!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 107, base 1+sqrt(107)
 Running N+1 test using discriminant 107, base 2+sqrt(107)
 Calling N+1 BLS with factored part 100.00% and helper 0.27% (300.80% proof)
 1188!28-1 is prime! (0.0387s+0.0007s)(digits:114)

 Primality testing 1498!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 109
 Running N+1 test using discriminant 149, base 1+sqrt(149)
 Running N+1 test using discriminant 149, base 2+sqrt(149)
 Calling N+1 BLS with factored part 100.00% and helper 4.67% (305.08% proof)
 1498!28-1 is prime! (0.0426s+0.0007s)(digits:149)

 Primality testing 1720!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 109
 Running N+1 test using discriminant 137, base 1+sqrt(137)
 Running N+1 test using discriminant 137, base 2+sqrt(137)
 Calling N+1 BLS with factored part 100.00% and helper 0.17% (300.35% proof)
 1720!28-1 is prime! (0.0511s+0.0008s)(digits:174)

 Primality testing 1914!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 79
 Running N+1 test using discriminant 139, base 1+sqrt(139)
 Running N+1 test using discriminant 139, base 2+sqrt(139)
 Calling N+1 BLS with factored part 100.00% and helper 2.45% (302.91% proof)
 1914!28-1 is prime! (0.0757s+0.0008s)(digits:197)

 Primality testing 2022!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 137
 Running N+1 test using discriminant 167, base 1+sqrt(167)
 Running N+1 test using discriminant 167, base 2+sqrt(167)
 Calling N+1 BLS with factored part 100.00% and helper 0.14% (300.43% proof)
 2022!28-1 is prime! (0.0755s+0.0008s)(digits:210)

 Primality testing 2034!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 89
 Running N+1 test using discriminant 103, base 1+sqrt(103)
 Running N+1 test using discriminant 103, base 2+sqrt(103)
 Calling N+1 BLS with factored part 100.00% and helper 0.14% (300.14% proof)
 2034!28-1 is prime! (0.0680s+0.0008s)(digits:211)

 Primality testing 2482!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 103, base 1+sqrt(103)
 Running N+1 test using discriminant 103, base 2+sqrt(103)
 Calling N+1 BLS with factored part 100.00% and helper 3.08% (303.31% proof)
 2482!28-1 is prime! (0.0858s+0.0007s)(digits:265)

 Primality testing 2546!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 127, base 2+sqrt(127)
 Running N+1 test using discriminant 127, base 3+sqrt(127)
 Calling N+1 BLS with factored part 100.00% and helper 5.76% (305.99% proof)
 2546!28-1 is prime! (0.0929s+0.0007s)(digits:272)

 Primality testing 2600!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 127
 Running N+1 test using discriminant 137, base 1+sqrt(137)
 Running N+1 test using discriminant 137, base 2+sqrt(137)
 Calling N+1 BLS with factored part 100.00% and helper 0.11% (300.22% proof)
 2600!28-1 is prime! (0.0789s+0.0007s)(digits:279)

 Primality testing 2704!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 173, base 1+sqrt(173)
 Running N+1 test using discriminant 173, base 2+sqrt(173)
 Calling N+1 BLS with factored part 100.00% and helper 1.96% (302.17% proof)
 2704!28-1 is prime! (0.0933s+0.0007s)(digits:292)

 Primality testing 2922!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 157
 Running N+1 test using discriminant 167, base 1+sqrt(167)
 Running N+1 test using discriminant 167, base 2+sqrt(167)
 Calling N+1 BLS with factored part 100.00% and helper 0.76% (300.85% proof)
 2922!28-1 is prime! (0.2310s+0.0007s)(digits:319)

 Primality testing 3124!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N-1 test using base 197
 Running N+1 test using discriminant 229, base 1+sqrt(229)
 Running N+1 test using discriminant 229, base 2+sqrt(229)
 Calling N+1 BLS with factored part 100.00% and helper 0.26% (300.44% proof)
 3124!28-1 is prime! (0.2316s+0.0007s)(digits:344)

 Primality testing 3208!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 157, base 1+sqrt(157)
 Running N+1 test using discriminant 157, base 2+sqrt(157)
 Calling N+1 BLS with factored part 100.00% and helper 1.02% (301.11% proof)
 3208!28-1 is prime! (0.2084s+0.0011s)(digits:354)

 Primality testing 3300!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 179
 Running N+1 test using discriminant 193, base 1+sqrt(193)
 Running N+1 test using discriminant 193, base 2+sqrt(193)
 Calling N+1 BLS with factored part 100.00% and helper 0.08% (300.25% proof)
 3300!28-1 is prime! (0.1494s+0.0008s)(digits:366)

 Primality testing 3330!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 197, base 1+sqrt(197)
 Running N+1 test using discriminant 197, base 2+sqrt(197)
 Calling N+1 BLS with factored part 100.00% and helper 0.73% (300.73% proof)
 3330!28-1 is prime! (0.1377s+0.0008s)(digits:369)

 Primality testing 3488!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 199
 Running N+1 test using discriminant 227, base 1+sqrt(227)
 Running N+1 test using discriminant 227, base 2+sqrt(227)
 Calling N+1 BLS with factored part 100.00% and helper 0.77% (300.85% proof)
 3488!28-1 is prime! (0.1318s+0.0008s)(digits:390)

 Primality testing 3818!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 223, base 1+sqrt(223)
 Running N+1 test using discriminant 223, base 2+sqrt(223)
 Calling N+1 BLS with factored part 100.00% and helper 2.23% (302.37% proof)
 3818!28-1 is prime! (0.1949s+0.0008s)(digits:432)

 Primality testing 4212!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 179, base 1+sqrt(179)
 Running N+1 test using discriminant 179, base 3+sqrt(179)
 Calling N+1 BLS with factored part 100.00% and helper 1.06% (301.19% proof)
 4212!28-1 is prime! (0.1795s+0.0009s)(digits:482)

 Primality testing 4636!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N-1 test using base 199
 Running N+1 test using discriminant 257, base 1+sqrt(257)
 Running N+1 test using discriminant 257, base 2+sqrt(257)
 Calling N+1 BLS with factored part 100.00% and helper 0.17% (300.17% proof)
 4636!28-1 is prime! (0.2269s+0.0012s)(digits:538)

 Primality testing 4718!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 347
 Running N+1 test using discriminant 353, base 1+sqrt(353)
 Running N+1 test using discriminant 353, base 2+sqrt(353)
 Calling N+1 BLS with factored part 100.00% and helper 0.05% (300.16% proof)
 4718!28-1 is prime! (0.1855s+0.0008s)(digits:548)

 Primality testing 4820!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 223, base 1+sqrt(223)
 Running N+1 test using discriminant 223, base 2+sqrt(223)
 Calling N+1 BLS with factored part 100.00% and helper 1.02% (301.02% proof)
 4820!28-1 is prime! (0.2211s+0.0008s)(digits:562)

 Primality testing 4914!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 367
 Running N+1 test using discriminant 379, base 1+sqrt(379)
 Running N+1 test using discriminant 379, base 2+sqrt(379)
 Calling N+1 BLS with factored part 100.00% and helper 1.36% (301.47% proof)
 4914!28-1 is prime! (0.1923s+0.0007s)(digits:574)

 Primality testing 4974!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 229
 Running N+1 test using discriminant 263, base 1+sqrt(263)
 Running N+1 test using discriminant 263, base 2+sqrt(263)
 Calling N+1 BLS with factored part 100.00% and helper 0.05% (300.10% proof)
 4974!28-1 is prime! (0.4923s+0.0218s)(digits:582)

 Primality testing 5628!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 227
 Running N+1 test using discriminant 283, base 1+sqrt(283)
 Running N+1 test using discriminant 283, base 2+sqrt(283)
 Calling N+1 BLS with factored part 100.00% and helper 0.05% (300.05% proof)
 5628!28-1 is prime! (0.2213s+0.0064s)(digits:669)

 Primality testing 5794!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 239
 Running N+1 test using discriminant 383, base 1+sqrt(383)
 Running N+1 test using discriminant 383, base 2+sqrt(383)
 Calling N+1 BLS with factored part 100.00% and helper 0.78% (300.83% proof)
 5794!28-1 is prime! (0.4678s+0.0008s)(digits:691)

 Primality testing 5886!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 263
 Running N+1 test using discriminant 277, base 1+sqrt(277)
 Running N+1 test using discriminant 277, base 2+sqrt(277)
 Calling N+1 BLS with factored part 100.00% and helper 0.04% (300.04% proof)
 5886!28-1 is prime! (0.4718s+0.0008s)(digits:704)

 Primality testing 6990!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 271
 Running N+1 test using discriminant 347, base 1+sqrt(347)
 Running N+1 test using discriminant 347, base 2+sqrt(347)
 Calling N+1 BLS with factored part 100.00% and helper 0.35% (300.42% proof)
 6990!28-1 is prime! (0.7717s+0.0012s)(digits:854)

 Primality testing 7240!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N-1 test using base 311
 Running N+1 test using discriminant 353, base 1+sqrt(353)
 Running N+1 test using discriminant 353, base 2+sqrt(353)
 Calling N+1 BLS with factored part 100.00% and helper 0.68% (300.71% proof)
 7240!28-1 is prime! (0.5688s+0.0008s)(digits:888)

 Primality testing 7312!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 307
 Running N+1 test using discriminant 349, base 1+sqrt(349)
 Running N+1 test using discriminant 349, base 2+sqrt(349)
 Calling N+1 BLS with factored part 100.00% and helper 0.97% (300.97% proof)
 7312!28-1 is prime! (0.5740s+0.0011s)(digits:898)

 Primality testing 7416!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 379, base 2+sqrt(379)
 Running N+1 test using discriminant 379, base 3+sqrt(379)
 Calling N+1 BLS with factored part 100.00% and helper 0.30% (300.40% proof)
 7416!28-1 is prime! (0.5618s+0.0007s)(digits:912)

 Primality testing 8130!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 331
 Running N+1 test using discriminant 359, base 1+sqrt(359)
 Running N+1 test using discriminant 359, base 2+sqrt(359)
 Calling N+1 BLS with factored part 100.00% and helper 0.65% (300.74% proof)
 8130!28-1 is prime! (0.8240s+0.0011s)(digits:1012)

 Primality testing 8234!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 349, base 1+sqrt(349)
 Running N+1 test using discriminant 349, base 2+sqrt(349)
 Calling N+1 BLS with factored part 100.00% and helper 0.70% (300.79% proof)
 8234!28-1 is prime! (0.9779s+0.0019s)(digits:1026)

 Primality testing 9252!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 389, base 1+sqrt(389)
 Running N+1 test using discriminant 389, base 3+sqrt(389)
 Calling N+1 BLS with factored part 100.00% and helper 0.03% (300.03% proof)
 9252!28-1 is prime! (0.8075s+0.0011s)(digits:1170)

 Primality testing 10948!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 397
 Running N+1 test using discriminant 419, base 1+sqrt(419)
 Running N+1 test using discriminant 419, base 2+sqrt(419)
 Calling N+1 BLS with factored part 100.00% and helper 0.02% (300.02% proof)
 10948!28-1 is prime! (0.7995s+0.0011s)(digits:1412)

 Primality testing 11104!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 563, base 1+sqrt(563)
 Running N+1 test using discriminant 563, base 2+sqrt(563)
 Calling N+1 BLS with factored part 100.00% and helper 0.06% (300.08% proof)
 11104!28-1 is prime! (1.3072s+0.0011s)(digits:1435)

 Primality testing 11804!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 521
 Running N+1 test using discriminant 563, base 1+sqrt(563)
 Running N+1 test using discriminant 563, base 2+sqrt(563)
 Calling N+1 BLS with factored part 100.00% and helper 0.45% (300.49% proof)
 11804!28-1 is prime! (1.4263s+0.0011s)(digits:1536)

 Primality testing 14126!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 1039
 Running N+1 test using discriminant 1051, base 1+sqrt(1051)
 Running N+1 test using discriminant 1051, base 2+sqrt(1051)
 Calling N+1 BLS with factored part 100.00% and helper 0.18% (300.21% proof)
 14126!28-1 is prime! (1.9860s+0.0012s)(digits:1877)

 Primality testing 15186!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 709
 Running N+1 test using discriminant 863, base 1+sqrt(863)
 Running N+1 test using discriminant 863, base 2+sqrt(863)
 Calling N+1 BLS with factored part 100.00% and helper 0.01% (300.04% proof)
 15186!28-1 is prime! (3.4906s+0.0012s)(digits:2035)

 Primality testing 18898!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 827
 Running N+1 test using discriminant 929, base 1+sqrt(929)
 Running N+1 test using discriminant 929, base 2+sqrt(929)
 Calling N+1 BLS with factored part 100.00% and helper 0.16% (300.19% proof)
 18898!28-1 is prime! (6.7387s+0.0015s)(digits:2596)

 Primality testing 20036!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 857
 Running N+1 test using discriminant 983, base 1+sqrt(983)
 Running N+1 test using discriminant 983, base 2+sqrt(983)
 Calling N+1 BLS with factored part 100.00% and helper 0.01% (300.03% proof)
 20036!28-1 is prime! (5.4868s+0.0011s)(digits:2770)

 Primality testing 20038!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 859, base 1+sqrt(859)
 Running N+1 test using discriminant 859, base 2+sqrt(859)
 Calling N+1 BLS with factored part 100.00% and helper 0.29% (300.32% proof)
 20038!28-1 is prime! (7.1406s+0.0019s)(digits:2770)

 Primality testing 21284!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 937, base 1+sqrt(937)
 Running N+1 test using discriminant 937, base 2+sqrt(937)
 Calling N+1 BLS with factored part 100.00% and helper 0.03% (300.06% proof)
 21284!28-1 is prime! (8.0551s+0.0015s)(digits:2963)

 Primality testing 21786!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 853
 Running N+1 test using discriminant 937, base 1+sqrt(937)
 Running N+1 test using discriminant 937, base 2+sqrt(937)
 Calling N+1 BLS with factored part 100.00% and helper 0.15% (300.15% proof)
 21786!28-1 is prime! (7.9757s+0.0015s)(digits:3040)

 Primality testing 23144!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 1109
 Running N+1 test using discriminant 1151, base 1+sqrt(1151)
 Running N+1 test using discriminant 1151, base 2+sqrt(1151)
 Calling N+1 BLS with factored part 100.00% and helper 0.01% (300.01% proof)
 23144!28-1 is prime! (9.5448s+0.0016s)(digits:3251)

 Primality testing 25324!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 1103, base 1+sqrt(1103)
 Running N+1 test using discriminant 1103, base 3+sqrt(1103)
 Calling N+1 BLS with factored part 100.00% and helper 0.01% (300.01% proof)
 25324!28-1 is prime! (9.9621s+0.0021s)(digits:3593)

 Primality testing 29762!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 1163, base 2+sqrt(1163)
 Running N+1 test using discriminant 1163, base 3+sqrt(1163)
 Calling N+1 BLS with factored part 100.00% and helper 0.01% (300.01% proof)
 29762!28-1 is prime! (18.2517s+0.0019s)(digits:4296)

 Primality testing 32048!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 1361
 Running N+1 test using discriminant 1459, base 1+sqrt(1459)
 Running N+1 test using discriminant 1459, base 2+sqrt(1459)
 Calling N+1 BLS with factored part 100.00% and helper 0.01% (300.01% proof)
 32048!28-1 is prime! (15.4297s+0.0022s)(digits:4663)

 Primality testing 32716!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 1439, base 1+sqrt(1439)
 Running N+1 test using discriminant 1439, base 3+sqrt(1439)
 Calling N+1 BLS with factored part 100.00% and helper 0.01% (300.01% proof)
 32716!28-1 is prime! (16.3172s+0.0027s)(digits:4771)

 Primality testing 32728!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 1373, base 2+sqrt(1373)
 Running N+1 test using discriminant 1373, base 3+sqrt(1373)
 Calling N+1 BLS with factored part 100.00% and helper 0.01% (300.01% proof)
 32728!28-1 is prime! (15.6038s+0.0022s)(digits:4772)

 Primality testing 34318!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 1321, base 1+sqrt(1321)
 Running N+1 test using discriminant 1321, base 2+sqrt(1321)
 Calling N+1 BLS with factored part 100.00% and helper 0.02% (300.04% proof)
 34318!28-1 is prime! (30.7083s+0.0030s)(digits:5029)

 Primality testing 36524!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 1663
 Running N+1 test using discriminant 1733, base 1+sqrt(1733)
 Running N+1 test using discriminant 1733, base 2+sqrt(1733)
 Calling N+1 BLS with factored part 100.00% and helper 0.01% (300.02% proof)
 36524!28-1 is prime! (22.6776s+0.0025s)(digits:5388)

 Primality testing 40824!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 1459
 Running N+1 test using discriminant 1481, base 1+sqrt(1481)
 Running N+1 test using discriminant 1481, base 2+sqrt(1481)
 Calling N+1 BLS with factored part 100.00% and helper 0.18% (300.19% proof)
 40824!28-1 is prime! (15.4726s+0.0033s)(digits:6092)

 Primality testing 53048!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 2341
 Running N+1 test using discriminant 2467, base 1+sqrt(2467)
 Running N+1 test using discriminant 2467, base 2+sqrt(2467)
 Calling N+1 BLS with factored part 100.00% and helper 0.00% (300.00% proof)
 53048!28-1 is prime! (74.3359s+0.0040s)(digits:8131)

 Primality testing 58508!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 2467
 Running N+1 test using discriminant 2579, base 1+sqrt(2579)
 Running N+1 test using discriminant 2579, base 2+sqrt(2579)
 Calling N+1 BLS with factored part 100.00% and helper 0.00% (300.01% proof)
 58508!28-1 is prime! (67.1043s+0.0051s)(digits:9057)

 Primality testing 63810!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 2549, base 1+sqrt(2549)
 Running N+1 test using discriminant 2549, base 2+sqrt(2549)
 Calling N+1 BLS with factored part 100.00% and helper 0.04% (300.05% proof)
 63810!28-1 is prime! (133.0750s+0.0057s)(digits:9963)

 Primality testing 73360!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 2621
 Running N+1 test using discriminant 2657, base 1+sqrt(2657)
 Running N+1 test using discriminant 2657, base 2+sqrt(2657)
 Calling N+1 BLS with factored part 100.00% and helper 0.00% (300.01% proof)
 73360!28-1 is prime! (89.1957s+0.0073s)(digits:11612) Marian Otremba 10/2013

 Primality testing 76814!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N-1 test using base 2963
 Running N+1 test using discriminant 3061, base 1+sqrt(3061)
 Running N+1 test using discriminant 3061, base 2+sqrt(3061)
 Calling N+1 BLS with factored part 100.00% and helper 0.04% (300.04% proof)
 76814!28-1 is prime! (168.7901s+0.0077s)(digits:12214) Marian Otremba 10/2013

 Primality testing 77420!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 2797
 Running N+1 test using discriminant 2803, base 1+sqrt(2803)
 Running N+1 test using discriminant 2803, base 2+sqrt(2803)
 Calling N+1 BLS with factored part 100.00% and helper 0.04% (300.04% proof)
 77420!28-1 is prime! (71.4181s+0.0077s)(digits:12319) Marian Otremba 10/2013

 Primality testing 79884!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 2879
 Running N+1 test using discriminant 2927, base 1+sqrt(2927)
 Running N+1 test using discriminant 2927, base 2+sqrt(2927)
 Calling N+1 BLS with factored part 100.00% and helper 0.05% (300.06% proof)
 79884!28-1 is prime! (74.3195s+0.0085s)(digits:12750) Marian Otremba 10/2013

 Primality testing 81350!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 3313, base 1+sqrt(3313)
 Running N+1 test using discriminant 3313, base 2+sqrt(3313)
 Calling N+1 BLS with factored part 100.00% and helper 0.01% (300.01% proof)
 81350!28-1 is prime! (238.4373s+0.0087s)(digits:13008) Marian Otremba 10/2013

 Primality testing 81406!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 3187
 Running N+1 test using discriminant 3229, base 1+sqrt(3229)
 Running N+1 test using discriminant 3229, base 2+sqrt(3229)
 Calling N+1 BLS with factored part 100.00% and helper 0.05% (300.05% proof)
 81406!28-1 is prime! (241.7079s+0.0086s)(digits:13018) Marian Otremba 10/2013

 Primality testing 87884!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 3677
 Running N+1 test using discriminant 3733, base 1+sqrt(3733)
 Running N+1 test using discriminant 3733, base 2+sqrt(3733)
 Calling N+1 BLS with factored part 100.00% and helper 0.11% (300.11% proof)
 87884!28-1 is prime! (200.1069s+0.0098s)(digits:14157) Marian Otremba 10/2013

 Primality testing 90752!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 3793, base 1+sqrt(3793)
 Running N+1 test using discriminant 3793, base 2+sqrt(3793)
 Calling N+1 BLS with factored part 100.00% and helper 0.04% (300.04% proof)
 90752!28-1 is prime! (197.8765s+0.0105s)(digits:14665) Marian Otremba 10/2013

 Primality testing 94460!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 4007
 Running N+1 test using discriminant 4049, base 1+sqrt(4049)
 Running N+1 test using discriminant 4049, base 2+sqrt(4049)
 Calling N+1 BLS with factored part 100.00% and helper 0.03% (300.03% proof)
 94460!28-1 is prime! (216.6450s+0.0109s)(digits:15322) Marian Otremba 10/2013

 Primality testing 100896!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 4253, base 1+sqrt(4253)
 Running N+1 test using discriminant 4253, base 3+sqrt(4253)
 Calling N+1 BLS with factored part 100.00% and helper 0.04% (300.04% proof)
 100896!28-1 is prime! (313.6653s+0.0113s)(digits:16469) Marian Otremba 10/2013

 Primality testing 114118!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N-1 test using base 4457
 Running N+1 test using discriminant 4513, base 1+sqrt(4513)
 Running N+1 test using discriminant 4513, base 2+sqrt(4513)
 Calling N+1 BLS with factored part 100.00% and helper 0.00% (300.01% proof)
 114118!28-1 is prime! (420.1220s+0.0147s)(digits:18845) Marian Otremba 10/2013

 Primality testing 115624!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5009
 Running N+1 test using discriminant 5233, base 1+sqrt(5233)
 Running N+1 test using discriminant 5233, base 2+sqrt(5233)
 Calling N+1 BLS with factored part 100.00% and helper 0.00% (300.00% proof)
 115624!28-1 is prime! (310.1518s+0.0150s)(digits:19117) Marian Otremba 10/2013

 Primality testing 128092!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5399
 Running N+1 test using discriminant 5413, base 1+sqrt(5413)
 Running N+1 test using discriminant 5413, base 2+sqrt(5413)
 Calling N+1 BLS with factored part 100.00% and helper 0.02% (300.03% proof)
 128092!28-1 is prime! (439.5654s+0.0183s)(digits:21382) Marian Otremba 10/2013

 Primality testing 137156!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5779
 Running N+1 test using discriminant 6073, base 1+sqrt(6073)
 Running N+1 test using discriminant 6073, base 2+sqrt(6073)
 Calling N+1 BLS with factored part 100.00% and helper 0.00% (300.00% proof)
 137156!28-1 is prime! (488.0964s+0.0208s)(digits:23040) Marian Otremba 10/2013

 Primality testing 141798!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5639
 Running N+1 test using discriminant 5653, base 1+sqrt(5653)
 Running N+1 test using discriminant 5653, base 2+sqrt(5653)
 Calling N+1 BLS with factored part 100.00% and helper 0.03% (300.03% proof)
 141798!28-1 is prime! (674.4619s+0.0223s)(digits:23893) Marian Otremba 10/2013

 Primality testing 151590!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5867
 Running N+1 test using discriminant 6091, base 1+sqrt(6091)
 Running N+1 test using discriminant 6091, base 2+sqrt(6091)
 Calling N+1 BLS with factored part 100.00% and helper 0.00% (300.00% proof)
 151590!28-1 is prime! (723.3084s+0.0258s)(digits:25699) Marian Otremba 10/2013

 Primality testing 162668!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 6779
 Running N+1 test using discriminant 7129, base 1+sqrt(7129)
 Running N+1 test using discriminant 7129, base 2+sqrt(7129)
 Calling N+1 BLS with factored part 100.00% and helper 0.00% (300.00% proof)
 162668!28-1 is prime! (797.7733s+0.0290s)(digits:27756) Marian Otremba 10/2013

 Primality testing 166456!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 7043, base 2+sqrt(7043)
 Running N+1 test using discriminant 7043, base 3+sqrt(7043)
 Calling N+1 BLS with factored part 100.00% and helper 0.04% (300.04% proof)
 166456!28-1 is prime! (792.8727s+0.0307s)(digits:28461) Marian Otremba 10/2013

 Primality testing 177506!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 12689
 Running N+1 test using discriminant 12703, base 1+sqrt(12703)
 Running N+1 test using discriminant 12703, base 2+sqrt(12703)
 Calling N+1 BLS with factored part 100.00% and helper 0.00% (300.00% proof)
 177506!28-1 is prime! (704.8819s+0.0346s)(digits:30527) Marian Otremba 10/2013

 Primality testing 182746!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 7159, base 1+sqrt(7159)
 Running N+1 test using discriminant 7159, base 2+sqrt(7159)
 Calling N+1 BLS with factored part 100.00% and helper 0.05% (300.05% proof)
 182746!28-1 is prime! (1710.3766s+0.0369s)(digits:31511) Marian Otremba 10/2013

 Primality testing 188886!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7393
 Running N+1 test using discriminant 7547, base 1+sqrt(7547)
 Running N+1 test using discriminant 7547, base 2+sqrt(7547)
 Calling N+1 BLS with factored part 100.00% and helper 0.01% (300.02% proof)
 188886!28-1 is prime! (1795.4218s+0.0393s)(digits:32666) Marian Otremba 10/2013

 Primality testing 198286!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 7649, base 1+sqrt(7649)
 Running N+1 test using discriminant 7649, base 2+sqrt(7649)
 Calling N+1 BLS with factored part 100.00% and helper 0.02% (300.02% proof)
 198286!28-1 is prime! (1540.5451s+0.0434s)(digits:34441) Marian Otremba 10/2013

 Primality testing 214758!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 8387
 Running N+1 test using discriminant 8429, base 1+sqrt(8429)
 Running N+1 test using discriminant 8429, base 2+sqrt(8429)
 Calling N+1 BLS with factored part 100.00% and helper 0.00% (300.00% proof)
 214758!28-1 is prime! (775.7009s+0.0208s)(digits:37568) Marian Otremba 08/2014

 Primality testing 269720!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 11257
 Running N+1 test using discriminant 11299, base 1+sqrt(11299)
 Running N+1 test using discriminant 11299, base 2+sqrt(11299)
 Calling N+1 BLS with factored part 100.00% and helper 0.00% (300.00% proof)
 269720!28-1 is prime! (828.4921s+0.0457s)(digits:48135) Marian Otremba 08/2014

 Primality testing 272230!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 19457
 Running N+1 test using discriminant 19483, base 1+sqrt(19483)
 Running N+1 test using discriminant 19483, base 2+sqrt(19483)
 Calling N+1 BLS with factored part 100.00% and helper 0.01% (300.01% proof)
 272230!28-1 is prime! (647.8263s+0.0341s)(digits:48622) Marian Otremba 08/2014

 Primality testing 277704!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 9923
 Running N+1 test using discriminant 9931, base 1+sqrt(9931)
 Running N+1 test using discriminant 9931, base 2+sqrt(9931)
 Calling N+1 BLS with factored part 100.00% and helper 0.00% (300.00% proof)
 277704!28-1 is prime! (706.4257s+0.0358s)(digits:49685) Marian Otremba 08/2014

 Primality testing 284218!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 11177, base 1+sqrt(11177)
 Running N+1 test using discriminant 11177, base 2+sqrt(11177)
 Calling N+1 BLS with factored part 100.00% and helper 0.00% (300.00% proof)
 284218!28-1 is prime! (1527.3769s+0.0356s)(digits:50953) Marian Otremba 08/2014

 Primality testing 287840!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 10289
 Running N+1 test using discriminant 10331, base 1+sqrt(10331)
 Running N+1 test using discriminant 10331, base 2+sqrt(10331)
 Calling N+1 BLS with factored part 100.00% and helper 0.00% (300.00% proof)
 287840!28-1 is prime! (653.4675s+0.0550s)(digits:51658) Marian Otremba 08/2014

 Primality testing 305610!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 11779
 Running N+1 test using discriminant 11807, base 1+sqrt(11807)
 Running N+1 test using discriminant 11807, base 2+sqrt(11807)
 Calling N+1 BLS with factored part 100.00% and helper 0.01% (300.01% proof)
 305610!28-1 is prime! (1455.5136s+0.5471s)(digits:55132) Marian Otremba 08/2014

 Primality testing 346696!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 12391
 Running N+1 test using discriminant 12413, base 1+sqrt(12413)
 Running N+1 test using discriminant 12413, base 2+sqrt(12413)
 Calling N+1 BLS with factored part 100.00% and helper 0.00% (300.00% proof)
 346696!28-1 is prime! (1167.5574s+0.0766s)(digits:63221) Marian Otremba 08/2014

 Primality testing 362998!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 13997
 Running N+1 test using discriminant 14081, base 1+sqrt(14081)
 Running N+1 test using discriminant 14081, base 2+sqrt(14081)
 Calling N+1 BLS with factored part 100.00% and helper 0.01% (300.01% proof)
 362998!28-1 is prime! (2972.6335s+0.0574s)(digits:66453) Marian Otremba 08/2014

 Primality testing 427622!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 16811
 Running N+1 test using discriminant 16979, base 1+sqrt(16979)
 Running N+1 test using discriminant 16979, base 2+sqrt(16979)
 Calling N+1 BLS with factored part 100.00% and helper 0.00% (300.00% proof)
 427622!28-1 is prime! (4334.4295s+0.0889s)(digits:79370) Marian Otremba 08/2014

 Primality testing 440356!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 15737
 Running N+1 test using discriminant 15749, base 1+sqrt(15749)
 Running N+1 test using discriminant 15749, base 2+sqrt(15749)
 Calling N+1 BLS with factored part 100.00% and helper 0.01% (300.01% proof)
 440356!28-1 is prime! (1515.3545s+0.0844s)(digits:81933) Marian Otremba 08/2014

 Primality testing 487878!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 18869
 Running N+1 test using discriminant 19037, base 1+sqrt(19037)
 Running N+1 test using discriminant 19037, base 2+sqrt(19037)
 Calling N+1 BLS with factored part 100.00% and helper 0.00% (300.00% proof)
 487878!28-1 is prime! (4928.5714s+0.1255s)(digits:91551) Marian Otremba 08/2014

 Primality testing 488082!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 34871
 Running N+1 test using discriminant 34883, base 1+sqrt(34883)
 Running N+1 test using discriminant 34883, base 2+sqrt(34883)
 Calling N+1 BLS with factored part 100.00% and helper 0.00% (300.00% proof)
 488082!28-1 is prime! (3294.9486s+0.1153s)(digits:91592) Marian Otremba 08/2014

 Primality testing 522436!28-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 7
 Running N+1 test using discriminant 22159, base 1+sqrt(22159)
 Running N+1 test using discriminant 22159, base 3+sqrt(22159)
 Calling N+1 BLS with factored part 100.00% and helper 0.00% (300.00% proof)
 522436!28-1 is prime! (4052.3447s+0.1226s)(digits:98590) Marian Otremba 08/2014

 Primality testing 559704!28-1 [N+1, Brillhart-Lehmer-Selfridge]
 Running N+1 test using discriminant 7, base 1+sqrt(7)
 Calling Brillhart-Lehmer-Selfridge with factored part 33.41%
 559704!28-1 is prime! (582.5116s+0.2476s)(digits:106221) Marian Otremba 10/2022

 Primality testing 563758!28-1 [N+1, Brillhart-Lehmer-Selfridge]
 Running N+1 test using discriminant 21977, base 1+sqrt(21977)
 Calling Brillhart-Lehmer-Selfridge with factored part 33.39%
 563758!28-1 is prime! (595.8224s+0.3022s)(digits:107053) Marian Otremba 10/2022

 Primality testing 594562!28-1 [N+1, Brillhart-Lehmer-Selfridge]
 Running N+1 test using discriminant 7, base 1+sqrt(7)
 Calling Brillhart-Lehmer-Selfridge with factored part 33.55%
 594562!28-1 is prime! (780.0649s+0.3338s)(digits:113393) Marian Otremba 10/2022

 Primality testing 597022!28-1 [N+1, Brillhart-Lehmer-Selfridge]
 Running N+1 test using discriminant 23041, base 1+sqrt(23041)
 Calling Brillhart-Lehmer-Selfridge with factored part 33.53%
 597022!28-1 is prime! (938.4652s+0.2938s)(digits:113900) Marian Otremba 10/2022

 Primality testing 685400!28-1 [N+1, Brillhart-Lehmer-Selfridge]
 Running N+1 test using discriminant 28591, base 1+sqrt(28591)
 Calling Brillhart-Lehmer-Selfridge with factored part 33.79%
 685400!28-1 is prime! (1332.3901s+0.2213s)(digits:132228) Marian Otremba 11/2022

 Primality testing 779474!28-1 [N+1, Brillhart-Lehmer-Selfridge]
 Running N+1 test using discriminant 7, base 1+sqrt(7)
 Calling Brillhart-Lehmer-Selfridge with factored part 33.38%
 779474!28-1 is prime! (1957.2436s+0.2848s)(digits:151932) Marian Otremba 11/2022

 Primality testing 869540!28-1 [N+1, Brillhart-Lehmer-Selfridge]
 Running N+1 test using discriminant 31091, base 1+sqrt(31091)
 Calling Brillhart-Lehmer-Selfridge with factored part 34.31%
 869540!28-1 is prime! (2288.2450s+0.3596s)(digits:170961) Marian Otremba 11/2022

 Primality testing 942828!28-1 [N+1, Brillhart-Lehmer-Selfridge]
 Running N+1 test using discriminant 7, base 1+sqrt(7)
 Calling Brillhart-Lehmer-Selfridge with factored part 33.73%
 942828!28-1 is prime! (2828.4895s+0.5304s)(digits:186554) Marian Otremba 11/2022