20!15+1 trivially factors prime!: 101 (digits:3)
 21!15+1 trivially factors prime!: 127 (digits:3)
 25!15+1 trivially factors prime!: 251 (digits:3)
 33!15+1 trivially factors prime!: 1783 (digits:4)
 46!15+1 trivially factors prime!: 22817 (digits:5)
 47!15+1 trivially factors prime!: 51137 (digits:5)
 56!15+1 trivially factors prime!: 656657 (digits:6)
 63!15+1 trivially factors prime!: 5388769 (digits:7)
 70!15+1 trivially factors prime!: 38500001 (digits:8)
 84!15+1 trivally factors prime!: 2636577217 (digits:10)
 89!15+1 trivally factors prime!: 6941485937 (digits:10)
 91!15+1 trivally factors prime!: 9625522817 (digits:10)

 Primality testing 103!15+1 [N-1, BLS]
 103!15+1 is prime! (0.000000 seconds) (digits:12)

 Primality testing 111!15+1 [N-1, BLS]
 111!15+1 is prime! (0.000000 seconds) (digits:14)

 Primality testing 112!15+1 [N-1, BLS]
 112!15+1 is prime! (0.000000 seconds) (digits:14)

 Primality testing 114!15+1 [N-1, BLS]
 114!15+1 is prime! (0.000000 seconds) (digits:14)

 Primality testing 136!15+1 [N-1, BLS]
 136!15+1 is prime! (0.000000 seconds) (digits:17)

 Primality testing 141!15+1 [N-1, BLS]
 141!15+1 is prime! (0.000000 seconds) (digits:18)

 Primality testing 145!15+1 [N-1, BLS]
 145!15+1 is prime! (0.000000 seconds) (digits:18)

 Primality testing 156!15+1 [N-1, BLS]
 156!15+1 is prime! (0.016000 seconds) (digits:20)

 Primality testing 162!15+1 [N-1, BLS]
 162!15+1 is prime! (0.031000 seconds) (digits:21)

 Primality testing 186!15+1 [N-1, BLS]
 186!15+1 is prime! (0.016000 seconds) (digits:25)

 Primality testing 192!15+1 [N-1, BLS]
 192!15+1 is prime! (0.015000 seconds) (digits:25)

 Primality testing 206!15+1 [N-1, BLS]
 206!15+1 is prime! (0.016000 seconds) (digits:28)

 Primality testing 226!15+1 [N-1, BLS]
 226!15+1 is prime! (0.000000 seconds) (digits:30)

 Primality testing 230!15+1 [N-1, BLS]
 230!15+1 is prime! (0.016000 seconds) (digits:31)

 Primality testing 233!15+1 [N-1, BLS]
 233!15+1 is prime! (0.015000 seconds) (digits:32)

 Primality testing 239!15+1 [N-1, BLS]
 239!15+1 is prime! (0.000000 seconds) (digits:33)

 Primality testing 252!15+1 [N-1, BLS]
 252!15+1 is prime! (0.015000 seconds) (digits:35)

 Primality testing 299!15+1 [N-1, BLS]
 299!15+1 is prime! (0.016000 seconds) (digits:42)

 Primality testing 347!15+1 [N-1, BLS]
 347!15+1 is prime! (0.016000 seconds) (digits:50)

 Primality testing 367!15+1 [N-1, BLS]
 367!15+1 is prime! (0.015000 seconds) (digits:54)

 Primality testing 390!15+1 [N-1, BLS]
 390!15+1 is prime! (0.016000 seconds) (digits:58)

 Primality testing 403!15+1 [N-1, BLS]
 403!15+1 is prime! (0.000000 seconds) (digits:60)

 Primality testing 421!15+1 [N-1, BLS]
 421!15+1 is prime! (0.016000 seconds) (digits:63)

 Primality testing 432!15+1 [N-1, BLS]
 432!15+1 is prime! (0.000000 seconds) (digits:65)

 Primality testing 460!15+1 [N-1, BLS]
 460!15+1 is prime! (0.016000 seconds) (digits:70)

 Primality testing 476!15+1 [N-1, BLS]
 476!15+1 is prime! (0.015000 seconds) (digits:73)

 Primality testing 479!15+1 [N-1, BLS]
 479!15+1 is prime! (0.016000 seconds) (digits:73)

 Primality testing 509!15+1 [N-1, BLS]
 509!15+1 is prime! (0.046000 seconds) (digits:79)

 Primality testing 530!15+1 [N-1, BLS]
 530!15+1 is prime! (0.000000 seconds) (digits:83)

 Primality testing 571!15+1 [N-1, BLS]
 571!15+1 is prime! (0.015000 seconds) (digits:90)

 Primality testing 582!15+1 [N-1, BLS]
 582!15+1 is prime! (0.016000 seconds) (digits:92)

 Primality testing 607!15+1 [N-1, BLS]
 607!15+1 is prime! (0.031000 seconds) (digits:97)

 Primality testing 633!15+1 [N-1, BLS]
 633!15+1 is prime! (0.016000 seconds) (digits:102)

 Primality testing 778!15+1 [N-1, BLS]
 778!15+1 is prime! (0.016000 seconds) (digits:129)

 Primality testing 859!15+1 [N-1, BLS]
 859!15+1 is prime! (0.015000 seconds) (digits:145)

 Primality testing 919!15+1 [N-1, BLS]
 919!15+1 is prime! (0.000000 seconds) (digits:157)

 Primality testing 954!15+1 [N-1, BLS]
 954!15+1 is prime! (0.015000 seconds) (digits:164)

 Primality testing 981!15+1 [N-1, BLS]
 981!15+1 is prime! (0.000000 seconds) (digits:169)

 Primality testing 989!15+1 [N-1, BLS]
 989!15+1 is prime! (0.032000 seconds) (digits:171)

 Primality testing 996!15+1 [N-1, BLS]
 996!15+1 is prime! (0.015000 seconds) (digits:172)

 Primality testing 997!15+1 [N-1, BLS]
 997!15+1 is prime! (0.016000 seconds) (digits:173)

 Primality testing 1079!15+1 [N-1, BLS]
 1079!15+1 is prime! (0.015000 seconds) (digits:189)

 Primality testing 1130!15+1 [N-1, BLS]
 1130!15+1 is prime! (0.015000 seconds) (digits:199)

 Primality testing 1193!15+1 [N-1, BLS]
 1193!15+1 is prime! (0.047000 seconds) (digits:212)

 Primality testing 1197!15+1 [N-1, BLS]
 1197!15+1 is prime! (0.016000 seconds) (digits:213)

 Primality testing 1410!15+1 [N-1, BLS]
 1410!15+1 is prime! (0.015000 seconds) (digits:257)

 Primality testing 1426!15+1 [N-1, BLS]
 1426!15+1 is prime! (0.031000 seconds) (digits:260)

 Primality testing 1430!15+1 [N-1, BLS]
 1430!15+1 is prime! (0.031000 seconds) (digits:262)

 Primality testing 1671!15+1 [N-1, BLS]
 1671!15+1 is prime! (0.016000 seconds) (digits:313)

 Primality testing 1790!15+1 [N-1, BLS]
 1790!15+1 is prime! (0.015000 seconds) (digits:339)

 Primality testing 1796!15+1 [N-1, BLS]
 1796!15+1 is prime! (0.031000 seconds) (digits:340)

 Primality testing 1917!15+1 [N-1, BLS]
 1917!15+1 is prime! (0.031000 seconds) (digits:366)

 Primality testing 1993!15+1 [N-1, BLS]
 1993!15+1 is prime! (0.032000 seconds) (digits:383)

 Primality testing 2053!15+1 [N-1, BLS]
 2053!15+1 is prime! (0.031000 seconds) (digits:396)

 Primality testing 2355!15+1 [N-1, BLS]
 2355!15+1 is prime! (0.079000 seconds) (digits:463)

 Primality testing 2544!15+1 [N-1, BLS]
 2544!15+1 is prime! (0.031000 seconds) (digits:506)

 Primality testing 2840!15+1 [N-1, BLS]
 2840!15+1 is prime! (0.078000 seconds) (digits:574)

 Primality testing 2906!15+1 [N-1, BLS]
 2906!15+1 is prime! (0.062000 seconds) (digits:589)

 Primality testing 2983!15+1 [N-1, BLS]
 2983!15+1 is prime! (0.094000 seconds) (digits:607)

 Primality testing 3493!15+1 [N-1, BLS]
 3493!15+1 is prime! (0.140000 seconds) (digits:726)

 Primality testing 3576!15+1 [N-1, BLS]
 3576!15+1 is prime! (0.062000 seconds) (digits:746)

 Primality testing 4501!15+1 [N-1, BLS]
 4501!15+1 is prime! (0.219000 seconds) (digits:968)

 Primality testing 4551!15+1 [N-1, BLS]
 4551!15+1 is prime! (0.094000 seconds) (digits:981)

 Primality testing 4704!15+1 [N-1, BLS]
 4704!15+1 is prime! (0.250000 seconds) (digits:1018)

 Primality testing 5249!15+1 [N-1, BLS]
 5249!15+1 is prime! (0.484000 seconds) (digits:1152)

 Primality testing 5595!15+1 [N-1, BLS]
 5595!15+1 is prime! (0.766000 seconds) (digits:1238)

 Primality testing 6325!15+1 [N-1, BLS]
 6325!15+1 is prime! (0.703000 seconds) (digits:1422)

 Primality testing 7023!15+1 [N-1, BLS]
 7023!15+1 is prime! (0.610000 seconds) (digits:1600)

 Primality testing 7138!15+1 [N-1, BLS]
 7138!15+1 is prime! (0.344000 seconds) (digits:1629)

 Primality testing 7970!15+1 [N-1, BLS]
 7970!15+1 is prime! (0.391000 seconds) (digits:1845)

 Primality testing 8630!15+1 [N-1, BLS]
 8630!15+1 is prime! (0.437000 seconds) (digits:2017)

 Primality testing 9620!15+1 [N-1, BLS]
 9620!15+1 is prime! (2.125000 seconds) (digits:2279)

 Primality testing 10619!15+1 [N-1, BLS]
 10619!15+1 is prime! (1.625000 seconds) (digits:2545)

 Primality testing 11886!15+1 [N-1, BLS]
 11886!15+1 is prime! (0.875000 seconds) (digits:2888)

 Primality testing 12070!15+1 [N-1, BLS]
 12070!15+1 is prime! (0.875000 seconds) (digits:2938)

 Primality testing 12349!15+1 [N-1, BLS]
 12349!15+1 is prime! (2.094000 seconds) (digits:3014)

 Primality testing 12885!15+1 [N-1, BLS]
 12885!15+1 is prime! (1.375000 seconds) (digits:3160)

 Primality testing 14392!15+1 [N-1, BLS]
 14392!15+1 is prime! (3.484000 seconds) (digits:3576)

 Primality testing 15166!15+1 [N-1, BLS]
 15166!15+1 is prime! (6.140000 seconds) (digits:3790)

 Primality testing 15193!15+1 [N-1, BLS]
 15193!15+1 is prime! (1.985000 seconds) (digits:3798)

 Primality testing 15206!15+1 [N-1, BLS]
 15206!15+1 is prime! (1.937000 seconds) (digits:3802)

 Primality testing 15290!15+1 [N-1, BLS]
 15290!15+1 is prime! (1.844000 seconds) (digits:3825)

 Primality testing 15855!15+1 [N-1, BLS]
 15855!15+1 is prime! (5.109000 seconds) (digits:3983)

 Primality testing 16489!15+1 [N-1, BLS]
 16489!15+1 is prime! (4.063000 seconds) (digits:4161)

 Primality testing 17346!15+1 [N-1, BLS]
 17346!15+1 is prime! (5.859000 seconds) (digits:4403)

 Primality testing 20604!15+1 [N-1, BLS]
 20604!15+1 is prime! (8.469000 seconds) (digits:5332)

 Primality testing 21331!15+1 [N-1, BLS]
 21331!15+1 is prime! (7.797000 seconds) (digits:5541)

 Primality testing 21925!15+1 [N-1, BLS]
 21925!15+1 is prime! (3.969000 seconds) (digits:5713)

 Primality testing 23356!15+1 [N-1, BLS]
 23356!15+1 is prime! (108.312000 seconds) (digits:6128)

 Primality testing 28422!15+1 [N-1, BLS]
 28422!15+1 is prime! (15.828000 seconds) (digits:7619)

 Primality testing 28570!15+1 [N-1, BLS]
 28570!15+1 is prime! (26.937000 seconds) (digits:7663)

 Primality testing 33777!15+1 [N-1, BLS]
 33777!15+1 is prime! (15.796000 seconds) (digits:9222)

 Primality testing 36889!15+1 [N-1, BLS]
 36889!15+1 is prime! (43.765000 seconds) (digits:10166) Ian Brown ??/2003

 Primality testing 37314!15+1 [N-1, BLS]
 37314!15+1 is prime! (51.046000 seconds) (digits:10296) Ian Brown ??/2003

 Primality testing 40193!15+1 [N-1, BLS]
 40193!15+1 is prime! (48.875000 seconds) (digits:11176) Ian Brown ??/2003

 Primality testing 40406!15+1 [N-1, BLS]
 40406!15+1 is prime! (48.328000 seconds) (digits:11241) Ian Brown ??/2003

 Primality testing 43306!15+1 [N-1, BLS]
 43306!15+1 is prime! (28.609000 seconds) (digits:12135) Ian Brown ??/2003

 Primality testing 43683!15+1 [N-1, BLS]
 43683!15+1 is prime! (77.094000 seconds) (digits:12252) Ian Brown ??/2003

 Primality testing 49806!15+1 [N-1, BLS]
 49806!15+1 is prime! (48.641000 seconds) (digits:14158) Ian Brown ??/2003

 Primality testing 52310!15+1 [N-1, BLS]
 52310!15+1 is prime! (49.563000 seconds) (digits:14944) Ian Brown ??/2003

 Primality testing 53927!15+1 [N-1, BLS]
 53927!15+1 is prime! (57.000000 seconds) (digits:15453) Ian Brown ??/2003

 Primality testing 54109!15+1 [N-1, BLS]
 54109!15+1 is prime! (81.813000 seconds) (digits:15511) Ian Brown ??/2003

 Primality testing 57058!15+1 [N-1, BLS]
 57058!15+1 is prime! (235.750000 seconds) (digits:16443) Ian Brown ??/2003

 Primality testing 57676!15+1 [N-1, BLS]
 57676!15+1 is prime! (71.235000 seconds) (digits:16639) Ian Brown ??/2003

 Primality testing 63893!15+1 [N-1, BLS]
 63893!15+1 is prime! (81.718000 seconds) (digits:18622) Ian Brown ??/2003

 Primality testing 66949!15+1 [N-1, BLS]
 66949!15+1 is prime! (108.313000 seconds) (digits:19603) Ian Brown ??/2003

 Primality testing 77800!15+1 [N-1, BLS]
 77800!15+1 is prime! (299.859000 seconds) (digits:23118) Ian Brown ??/2003

 Primality testing 79030!15+1 [N-1, BLS]
 79030!15+1 is prime! (497.422000 seconds) (digits:23520) Ian Brown ??/2003

 Primality testing 82079!15+1 [N-1, BLS]
 82079!15+1 is prime! (265.921000 seconds) (digits:24517) Ian Brown ??/2003

 Primality testing 106195!15+1 [N-1, BLS]
 Running N-1 test using base 3
 106195!15+1 is prime! (310.6861s+0.0404s) (digits:32512) Matt Mills 04/2005

 Primality testing 110167!15+1 [N-1, BLS]
 Running N-1 test using base 3
 110167!15+1 is prime! (337.6286s+0.0364s) (digits:33845) Matt Mills 04/2005

 Primality testing 139671!15+1 [N-1, BLS]
 Running N-1 test using base 5
 139671!15+1 is prime! (632.0456s+0.1418s) (digits:43867) Ken Davis 11/2005

 Primality testing 154069!15+1 [N-1, BLS]
 Running N-1 test using base 3
 Running N-1 test using base 5
 154069!15+1 is prime! (295.6439s+0.0553s) (digits:48827) Richard Kapek 09/2010

 Primality testing 156553!15+1 [N-1, BLS]
 Running N-1 test using base 3
 Running N-1 test using base 11597
 156553!15+1 is prime! (409.6585s+0.0818s) (digits:49686) Richard Kapek 09/2010

 Primality testing 164210!15+1 [N-1, BLS]
 Running N-1 test using base 3
 Running N-1 test using base 16433
 164210!15+1 is prime! (512.6358s+0.0497s) (digits:52344) Richard Kapek 09/2010

 Primality testing 169786!15+1 [N-1, BLS]
 Running N-1 test using base 3
 Running N-1 test using base 5
 169786!15+1 is prime! (420.8696s+0.0589s) (digits:54285) Richard Kapek 09/2010

 Primality testing 197874!15+1 [N-1, BLS]
 Running N-1 test using base 5
 Running N-1 test using base 16607
 197874!15+1 is prime! (163.9856s+0.0274s)(digits:64142) MO 05/2014

 Primality testing 198156!15+1 [N-1, BLS]
 Running N-1 test using base 5
 198156!15+1 is prime! (75.5940s+0.0192s)(digits:64242) MO 05/2014

 Primality testing 205203!15+1 [N-1, BLS]
 Running N-1 test using base 17159
 Running N-1 test using base 17209
 Running N-1 test using base 17299
 205203!15+1 is prime! (324.8752s+0.0269s)(digits:66734) MO 05/2014

 Primality testing 207973!15+1 [N-1, BLS]
 Running N-1 test using base 3
 Running N-1 test using base 14867
 207973!15+1 is prime! (211.5054s+0.0214s)(digits:67715) MO 05/2014

 Primality testing 216135!15+1 [N-1, BLS]
 Running N-1 test using base 14419
 216135!15+1 is prime! (122.4494s+0.0303s)(digits:70613) MO 05/2014

 Primality testing 244902!15+1 [N-1, BLS]
 Running N-1 test using base 20441
 Running N-1 test using base 20641
 244902!15+1 is prime! (358.8810s+0.0359s)(digits:80898) MO 05/2014

 Primality testing 317400!15+1 [N-1, BLS]
 Running N-1 test using base 21169
 317400!15+1 is prime! (171.9937s+0.0609s)(digits:107227) MO 12/2021

 Primality testing 343667!15+1 [N-1, BLS]
 Running N-1 test using base 3
 Running N-1 test using base 5
 343667!15+1 is prime! (297.8909s+0.0644s)(digits:116892) MO 12/2021

 Primality testing 343900!15+1 [N-1, BLS]
 Running N-1 test using base 3
 Running N-1 test using base 34429
 343900!15+1 is prime! (369.7158s+0.0655s)(digits:116978) MO 12/2021

 Primality testing 353273!15+1 [N-1, BLS]
 Running N-1 test using base 3
 Running N-1 test using base 5
 Running N-1 test using base 25447
 353273!15+1 is prime! (541.4236s+0.0522s)(digits:120442) MO 12/2021

 Primality testing 357177!15+1 [N-1, BLS]
 Running N-1 test using base 5
 357177!15+1 is prime! (155.0082s+0.0750s)(digits:121886) MO 12/2021

 Primality testing 375767!15+1 [N-1, BLS]
 Running N-1 test using base 3
 Running N-1 test using base 5
 375767!15+1 is prime! (405.0773s+0.0810s)(digits:128782) MO 12/2021

 Primality testing 387351!15+1 [N-1, BLS]
 Running N-1 test using base 5
 Running N-1 test using base 32303
 Running N-1 test using base 32363
 387351!15+1 is prime! (806.8195s+0.0822s)(digits:133092) MO 12/2021

 Primality testing 426283!15+1 [N-1, BLS]
 Running N-1 test using base 3
 Running N-1 test using base 5
 426283!15+1 is prime! (479.0024s+0.0776s)(digits:147651) MO 12/2021

 Primality testing 443631!15+1 [N-1, BLS]
 Running N-1 test using base 5
 Running N-1 test using base 36973
 443631!15+1 is prime! (641.3154s+0.0964s)(digits:154172) MO 12/2021

 Primality testing 453204!15+1 [N-1, BLS]
 Running N-1 test using base 5
 Running N-1 test using base 37997
 Running N-1 test using base 38167
 Running N-1 test using base 38177
 453204!15+1 is prime! (1413.6121s+0.0984s)(digits:157779) MO 12/2021

 Primality testing 458514!15+1 [N-1, BLS]
 Running N-1 test using base 5
 Running N-1 test using base 38317
 458514!15+1 is prime! (754.7742s+0.1025s)(digits:159782) MO 12/2021

 Primality testing 474130!15+1 [N-1, BLS]
 Running N-1 test using base 3
 474130!15+1 is prime! (321.4460s+0.1153s)(digits:165683) MO 12/2021

 Primality testing 495150!15+1 [N-1, BLS]
 Running N-1 test using base 33013
 Running N-1 test using base 33023
 495150!15+1 is prime! (984.0370s+0.1246s)(digits:173650) MO 12/2021

 Primality testing 498100!15+1 [N-1, BLS]
 Running N-1 test using base 3
 Running N-1 test using base 49921
 Running N-1 test using base 49939
 498100!15+1 is prime! (1331.1582s+0.1205s)(digits:174771) MO 12/2021

 Primality testing 527950!15+1 [N-1, BLS]
 Running N-1 test using base 3
 Running N-1 test using base 52807
 527950!15+1 is prime! (956.1804s+0.1242s)(digits:186134) MO 12/2021

 Primality testing 562086!15+1 [N-1, BLS]
 Running N-1 test using base 5
 Running N-1 test using base 46853
 Running N-1 test using base 46933
 562086!15+1 is prime! (1649.0253s+0.1583s)(digits:199188) MO 12/2021

 Primality testing 571360!15+1 [N-1, BLS]
 Running N-1 test using base 3
 Running N-1 test using base 57223
 571360!15+1 is prime! (1077.6116s+0.1441s)(digits:202745) MO 12/2021

 Primality testing 620236!15+1 [N-1, BLS]
 Running N-1 test using base 3
 620236!15+1 is prime! (521.5164s+0.1791s)(digits:221562) MO 12/2021

 Primality testing 648936!15+1 [N-1, BLS]
 Running N-1 test using base 5
 648936!15+1 is prime! (624.1465s+0.1848s)(digits:232665) MO 12/2021

 Primality testing 656463!15+1 [N-1, BLS]
 Running N-1 test using base 54779
 Running N-1 test using base 54799
 656463!15+1 is prime! (1835.5373s+0.1883s)(digits:235583) MO 12/2021

 Primality testing 720739!15+1 [N-1, BLS]
 Running N-1 test using base 3
 Running N-1 test using base 5
 720739!15+1 is prime! (1556.1756s+0.2412s)(digits:260598) MO 12/2021

 Primality testing 730039!15+1 [N-1, BLS]
 Running N-1 test using base 3
 730039!15+1 is prime! (783.2877s+0.2450s)(digits:264232) MO 12/2021

 Primality testing 771451!15+1 [N-1, BLS]
 Running N-1 test using base 3
 Running N-1 test using base 5
 771451!15+1 is prime! (1811.2248s+0.2651s)(digits:280452) MO 01/2022

 Primality testing 783108!15+1 [N-1, BLS]
 Running N-1 test using base 5
 783108!15+1 is prime! (919.9607s+0.2731s)(digits:285030) MO 01/2022