22!20-1 trivially factors prime!: 43 (digits:2)
 28!20-1 trivially factors prime!: 223 (digits:3)
 32!20-1 trivially factors prime!: 383 (digits:3)
 38!20-1 trivially factors prime!: 683 (digits:3)
 42!20-1 trivially factors prime!: 1847 (digits:4)
 54!20-1 trivially factors prime!: 25703 (digits:5)
 58!20-1 trivially factors prime!: 39671 (digits:5)
 70!20-1 trivially factors prime!: 1049999 (digits:7)
 80!20-1 trivially factors prime!: 3839999 (digits:7)
 84!20-1 trivially factors prime!: 22708223 (digits:8)
 
 Primality testing 118!20-1 [N-1, Brillhart-Lehmer-Selfridge]
 small number, factored prime!
 118!20-1 is prime! (0.0171s+0.0011s) (digits:11)
 
 Primality testing 132!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 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 15.00% (320.00% proof)
 132!20-1 is prime! (0.0489s+0.0035s) (digits:13)
 
 Primality testing 140!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 19
 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 9.52% (314.29% proof)
 140!20-1 is prime! (0.0469s+0.0009s) (digits:13)
 
 Primality testing 172!20-1 [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 18.18% (320.00% proof)
 172!20-1 is prime! (0.0496s+0.0031s) (digits:17)
 
 Primality testing 178!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 Running N+1 test using discriminant 11, base 2+sqrt(11)
 Running N+1 test using discriminant 11, base 3+sqrt(11)
 Calling N+1 BLS with factored part 100.00% and helper 1.79% (305.36% proof)
 178!20-1 is prime! (0.0449s+0.0009s) (digits:18)
 
 Primality testing 190!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 29
 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 29.03% (332.26% proof)
 190!20-1 is prime! (0.0141s+0.0020s) (digits:19)
 
 Primality testing 202!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 Running N+1 test using discriminant 19, base 1+sqrt(19)
 Running N+1 test using discriminant 19, base 4+sqrt(19)
 Calling N+1 BLS with factored part 100.00% and helper 24.24% (325.76% proof)
 202!20-1 is prime! (0.0082s+0.0009s) (digits:20)
 
 Primality testing 204!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 Running N+1 test using discriminant 19, base 1+sqrt(19)
 Running N+1 test using discriminant 19, base 4+sqrt(19)
 Calling N+1 BLS with factored part 100.00% and helper 1.49% (304.48% proof)
 204!20-1 is prime! (0.0124s+0.0041s) (digits:21)
 
 Primality testing 218!20-1 [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 25.00% (326.39% proof)
 218!20-1 is prime! (0.0122s+0.0033s) (digits:22)
 
 Primality testing 252!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 17
 Running N+1 test using discriminant 31, base 1+sqrt(31)
 Running N+1 test using discriminant 31, base 2+sqrt(31)
 Calling N+1 BLS with factored part 100.00% and helper 3.49% (305.81% proof)
 252!20-1 is prime! (0.0107s+0.0047s) (digits:27)
 
 Primality testing 332!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 41
 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 2.52% (304.20% proof)
 332!20-1 is prime! (0.0122s+0.0054s) (digits:37)
 
 Primality testing 360!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 19
 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 6.15% (306.92% proof)
 360!20-1 is prime! (0.0083s+0.0012s) (digits:40)
 
 Primality testing 404!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 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 0.67% (301.33% proof)
 404!20-1 is prime! (0.0094s+0.0008s) (digits:46)
 
 Primality testing 482!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 29
 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 1.63% (302.17% proof)
 482!20-1 is prime! (0.0109s+0.0012s) (digits:56)
 
 Primality testing 592!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 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 7.26% (308.12% proof)
 592!20-1 is prime! (0.0108s+0.0019s) (digits:71)
 
 Primality testing 738!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 Running N+1 test using discriminant 61, base 2+sqrt(61)
 Running N+1 test using discriminant 61, base 3+sqrt(61)
 Calling N+1 BLS with factored part 100.00% and helper 6.95% (307.62% proof)
 738!20-1 is prime! (0.0149s+0.0009s) (digits:92)
 
 Primality testing 832!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 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 2.30% (302.87% proof)
 832!20-1 is prime! (0.0159s+0.0009s) (digits:105)
 
 Primality testing 850!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 89
 Running N+1 test using discriminant 101, base 1+sqrt(101)
 Running N+1 test using discriminant 101, base 2+sqrt(101)
 Calling N+1 BLS with factored part 100.00% and helper 0.28% (300.56% proof)
 850!20-1 is prime! (0.0145s+0.0010s) (digits:108)
 
 Primality testing 898!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 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 2.37% (302.37% proof)
 898!20-1 is prime! (0.0209s+0.0012s) (digits:115)
 
 Primality testing 1052!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 67
 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 2.19% (302.41% proof)
 1052!20-1 is prime! (0.0196s+0.0012s) (digits:138)
 
 Primality testing 1082!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 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 0.21% (300.21% proof)
 1082!20-1 is prime! (0.0240s+0.0010s) (digits:143)
 
 Primality testing 1174!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 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 1.54% (301.54% proof)
 1174!20-1 is prime! (0.0261s+0.0013s) (digits:157)
 
 Primality testing 1830!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 193
 Running N+1 test using discriminant 211, base 1+sqrt(211)
 Running N+1 test using discriminant 211, base 2+sqrt(211)
 Calling N+1 BLS with factored part 100.00% and helper 0.12% (300.23% proof)
 1830!20-1 is prime! (0.0325s+0.0012s) (digits:261)
 
 Primality testing 1844!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 Running N+1 test using discriminant 139, base 1+sqrt(139)
 Running N+1 test using discriminant 139, base 4+sqrt(139)
 Calling N+1 BLS with factored part 100.00% and helper 0.11% (300.11% proof)
 1844!20-1 is prime! (0.0425s+0.0012s) (digits:263)
 
 Primality testing 2088!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 Running N+1 test using discriminant 163, base 1+sqrt(163)
 Running N+1 test using discriminant 163, base 2+sqrt(163)
 Calling N+1 BLS with factored part 100.00% and helper 0.10% (300.30% proof)
 2088!20-1 is prime! (0.0557s+0.0012s) (digits:304)
 
 Primality testing 2092!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 137
 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 0.30% (300.50% proof)
 2092!20-1 is prime! (0.0520s+0.0011s) (digits:304)
 
 Primality testing 2150!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 233
 Running N+1 test using discriminant 241, base 1+sqrt(241)
 Running N+1 test using discriminant 241, base 2+sqrt(241)
 Calling N+1 BLS with factored part 100.00% and helper 0.10% (300.29% proof)
 2150!20-1 is prime! (0.0404s+0.0012s) (digits:314)
 
 Primality testing 2490!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 251
 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 1.71% (301.79% proof)
 2490!20-1 is prime! (0.0509s+0.0010s) (digits:371)
 
 Primality testing 2804!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 Running N+1 test using discriminant 179, base 1+sqrt(179)
 Running N+1 test using discriminant 179, base 2+sqrt(179)
 Calling N+1 BLS with factored part 100.00% and helper 0.07% (300.14% proof)
 2804!20-1 is prime! (0.0755s+0.0015s) (digits:425)
 
 Primality testing 3078!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 Running N+1 test using discriminant 181, base 2+sqrt(181)
 Running N+1 test using discriminant 181, base 3+sqrt(181)
 Calling N+1 BLS with factored part 100.00% and helper 0.06% (300.13% proof)
 3078!20-1 is prime! (0.1050s+0.0012s) (digits:472)
 
 Primality testing 4020!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 211
 Running N+1 test using discriminant 233, base 1+sqrt(233)
 Running N+1 test using discriminant 233, base 2+sqrt(233)
 Calling N+1 BLS with factored part 100.00% and helper 0.85% (300.94% proof)
 4020!20-1 is prime! (0.0936s+0.0014s) (digits:639)
 
 Primality testing 5180!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 263
 Running N+1 test using discriminant 281, base 1+sqrt(281)
 Running N+1 test using discriminant 281, base 2+sqrt(281)
 Calling N+1 BLS with factored part 100.00% and helper 0.04% (300.07% proof)
 5180!20-1 is prime! (0.1681s+0.0013s) (digits:852)
 
 Primality testing 6162!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 389
 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 0.09% (300.12% proof)
 6162!20-1 is prime! (0.4812s+0.0011s) (digits:1036)
 
 Primality testing 6898!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 Running N+1 test using discriminant 421, base 2+sqrt(421)
 Running N+1 test using discriminant 421, base 3+sqrt(421)
 Calling N+1 BLS with factored part 100.00% and helper 0.03% (300.05% proof)
 6898!20-1 is prime! (0.5192s+0.0011s) (digits:1176)
 
 Primality testing 8070!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 823
 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 0.24% (300.28% proof)
 8070!20-1 is prime! (0.4775s+0.0009s) (digits:1404)
 
 Primality testing 8974!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 Running N+1 test using discriminant 503, base 1+sqrt(503)
 Running N+1 test using discriminant 503, base 2+sqrt(503)
 Calling N+1 BLS with factored part 100.00% and helper 0.02% (300.04% proof)
 8974!20-1 is prime! (0.8633s+0.0012s) (digits:1581)
 
 Primality testing 9230!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 937
 Running N+1 test using discriminant 967, base 1+sqrt(967)
 Running N+1 test using discriminant 967, base 2+sqrt(967)
 Calling N+1 BLS with factored part 100.00% and helper 0.02% (300.02% proof)
 9230!20-1 is prime! (0.5394s+0.0013s) (digits:1632)
 
 Primality testing 15078!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 Running N+1 test using discriminant 971, base 2+sqrt(971)
 Running N+1 test using discriminant 971, base 3+sqrt(971)
 Calling N+1 BLS with factored part 100.00% and helper 0.01% (300.01% proof)
 15078!20-1 is prime! (2.8253s+0.0014s) (digits:2825)
 
 Primality testing 16644!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 Running N+1 test using discriminant 1049, base 1+sqrt(1049)
 Running N+1 test using discriminant 1049, base 4+sqrt(1049)
 Calling N+1 BLS with factored part 100.00% and helper 0.01% (300.02% proof)
 16644!20-1 is prime! (2.5261s+0.0012s) (digits:3154)
 
 Primality testing 20568!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 Running N+1 test using discriminant 1303, base 1+sqrt(1303)
 Running N+1 test using discriminant 1303, base 2+sqrt(1303)
 Calling N+1 BLS with factored part 100.00% and helper 0.11% (300.11% proof)
 20568!20-1 is prime! (4.0202s+0.0016s) (digits:3992)
 
 Primality testing 20978!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 Running N+1 test using discriminant 1201, base 1+sqrt(1201)
 Running N+1 test using discriminant 1201, base 2+sqrt(1201)
 Calling N+1 BLS with factored part 100.00% and helper 0.10% (300.10% proof)
 20978!20-1 is prime! (7.8557s+0.0012s) (digits:4080)
 
 Primality testing 23230!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 2341
 Running N+1 test using discriminant 2357, base 1+sqrt(2357)
 Running N+1 test using discriminant 2357, base 2+sqrt(2357)
 Calling N+1 BLS with factored part 100.00% and helper 0.01% (300.01% proof)
 23230!20-1 is prime! (5.0699s+0.0016s) (digits:4570)
 
 Primality testing 24450!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 2473
 Running N+1 test using discriminant 2521, base 1+sqrt(2521)
 Running N+1 test using discriminant 2521, base 2+sqrt(2521)
 Calling N+1 BLS with factored part 100.00% and helper 0.01% (300.01% proof)
 24450!20-1 is prime! (7.7557s+0.0017s) (digits:4837)
 
 Primality testing 34918!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 Running N+1 test using discriminant 1951, base 1+sqrt(1951)
 Running N+1 test using discriminant 1951, base 2+sqrt(1951)
 Calling N+1 BLS with factored part 100.00% and helper 0.05% (300.07% proof)
 34918!20-1 is prime! (18.4533s+0.0018s) (digits:7176)
 
 Primality testing 38924!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 Running N+1 test using discriminant 2549, base 1+sqrt(2549)
 Running N+1 test using discriminant 2549, base 4+sqrt(2549)
 Calling N+1 BLS with factored part 100.00% and helper 0.00% (300.01% proof)
 38924!20-1 is prime! (21.0532s+0.0020s) (digits:8091)
 
 Primality testing 39214!20-1 [N-1/N+1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 5
 Running N+1 test using discriminant 2273, base 1+sqrt(2273)
 Running N+1 test using discriminant 2273, base 2+sqrt(2273)
 Calling N+1 BLS with factored part 100.00% and helper 0.00% (300.01% proof)
 39214!20-1 is prime! (26.6167s+0.0032s) (digits:8158)