Stats for the "Is this prime?" game

This page is updated at most once per minute. It was last updated at .

You can download a dump of every attempt at the game in tab-separated values format: dump-2026-03-08.zip (137MB)

All-time stats

8253685 attempts

Reason for ending Frequency
composite489445959%
prime309234537%
time2654503%
Final number Reason for ending Frequency
87composite94537411.45%
51composite3904384.73%
57composite3873324.69%
39composite2557513.1%
1composite2528083.06%
63composite2064482.5%
49composite2027692.46%
69composite1903092.31%
5prime1889022.29%
27composite1778302.15%
9composite1776742.15%
59prime1727522.09%
79prime1646101.99%
67prime1573781.91%
29prime1547641.88%
47prime1509461.83%
21composite1490621.81%
61prime1476361.79%
53prime1462181.77%
77composite1450671.76%

100 most recent attempts

Time finished Time taken Sequence Final number Reason for ending Difficulty Max. number Time allowed
2026-04-20 00:34:437.38629,59,75,67,3351composite1.02060
2026-04-20 00:34:350.77951composite1.02060
2026-04-20 00:34:320.9561composite1.02060
2026-04-20 00:34:300.96475composite1.02060
2026-04-20 00:34:276.62341,19,39,581composite1.02060
2026-04-19 21:22:0360.96327time1.02060
2026-04-19 17:37:314.96729,43,77,25,4937prime1.02060
2026-04-19 17:37:251.48917prime1.02060
2026-04-19 17:37:233.23479,7751composite1.02060
2026-04-19 17:37:192.4833,7357composite1.02060
2026-04-19 17:37:162.1679composite1.02060
2026-04-19 17:37:1313.38361,71,13,5,63,9,55,69,83,7,85,19,3525composite1.02060
2026-04-19 17:36:593.01653,279composite1.02060
2026-04-19 17:36:5510.4539,25,69,83,3,45,65,23,61,35,111composite1.02060
2026-04-19 17:36:442.23213,4757composite1.02060
2026-04-19 17:36:410.96757composite1.02060
2026-04-19 17:36:390.9521composite1.02060
2026-04-19 17:36:370.96927composite1.02060
2026-04-19 16:52:0660.00125,53,31,17,33,5,13,9,35,67,97,59,11,69,83,103,15,1981time1.02060
2026-04-19 16:51:062.48457composite1.02060
2026-04-19 16:51:0212.26635,45,39,47,1577composite1.02060
2026-04-19 16:50:491.151composite1.02060
2026-04-19 16:50:471.6179composite1.02060
2026-04-19 16:50:448.9513,3,5969composite1.02060
2026-04-19 16:50:334.58353,2911prime1.02060
2026-04-19 16:50:284.28353,23,1765composite1.02060
2026-04-19 16:50:234.3991779prime1.02060
2026-04-19 16:50:184.23317,6347prime1.02060
2026-04-19 16:50:131.9551composite1.02060
2026-04-19 16:50:10367prime1.02060
2026-04-19 16:50:063.95165,4957composite1.02060
2026-04-19 16:50:028.93261,37,19,7977composite1.02060
2026-04-19 16:49:410.5333prime1.02060
2026-04-19 16:49:401.583457prime1.02060
2026-04-19 16:49:380.41759prime1.02060
2026-04-19 16:49:372.0833361prime1.02060
2026-04-19 16:49:306.73457,65,49,91composite1.02060
2026-04-19 16:49:239.11717,55,15,6757composite1.02060
2026-04-19 16:49:135.7579,37,53,65,635prime1.02060
2026-04-19 16:49:062.58473,6751composite1.02060
2026-04-19 16:49:0312.93329,59,9,33,55,67,25,41,17,6391composite1.02060
2026-04-19 16:48:492.0174357composite1.02060
2026-04-19 16:48:4645.353,61,3,13,25,23,41,83,5,59,39,57,77,3151composite1.02060
2026-04-19 16:47:598.86661,73,33,67,3151composite1.02060
2026-04-19 16:47:494.31631,7779prime1.02060
2026-04-19 16:47:442.253335composite1.02060
2026-04-19 16:47:411.251composite1.02060
2026-04-19 16:47:3810.36611,15,27,7371prime1.02060
2026-04-19 16:04:208.31925,73,39,431composite1.02060
2026-04-19 16:04:112.64355composite1.02060
2026-04-19 16:04:033.768739composite1.02060
2026-04-19 16:03:571.3857composite1.02060
2026-04-19 16:03:533.94179prime1.02060
2026-04-19 14:21:327.27757,9,41,75,11,27,5,85,8167prime1.02060
2026-04-19 14:21:2323.10973,65,33,81,41,51,45,3,87,17,63,83,69,97,93,25,55,27,57,9,49,13,107,115,85,123,79,117,59133composite1.02060
2026-04-19 14:20:599.47247,51,79,23,21,17,5987composite1.02060
2026-04-19 14:15:0527.87353,13,35,1,4161prime1.02060
2026-04-19 12:50:574.6571,61,25,3,69,2341prime1.02060
2026-04-19 12:50:522.43249,5971prime1.02060
2026-04-19 12:50:491.1641357composite1.02060
2026-04-19 12:50:471.315157prime1.02060
2026-04-19 12:50:4515.91473,53,75,83,15,51,3,29,79,27,25,71,67,77,81,4787composite1.02060
2026-04-19 12:50:2811.3167,73,23,3,83,75,29,81,1,13,599composite1.02060
2026-04-19 12:45:5751.47451,73,9,13,61,83,33,17,23,15,93,29,97,79,57,41,7,27,75,85,21,63,115,35,39,19,105,131,109,119,111,117,95,71,77,149,159,141,49,171,151,69,143,133,47,163,65,123,99,173,207,127,145,227,3,211,121,219,217,107,25,89,67,139,251,179,175,287233prime1.02060
2026-04-19 11:43:211.2995761prime1.02060
2026-04-19 11:43:190.13375composite1.02060
2026-04-19 11:43:190.17655composite1.02060
2026-04-19 11:43:190.16127composite1.02060
2026-04-19 11:43:180.527composite1.02060
2026-04-19 11:43:180.38321composite1.02060
2026-04-19 11:43:170.44557composite1.02060
2026-04-19 11:43:160.93971prime1.02060
2026-04-19 11:43:0911.63629,51,77,11,63,23,6539composite1.02060
2026-04-19 11:42:561.15219prime1.02060
2026-04-19 10:50:060.0457composite1.02060
2026-04-19 10:43:3460.001941time1.02060
2026-04-19 10:05:4113.43933,51,3,61,81,67,9,55,69,71,77,79,101,99,7589prime1.02060
2026-04-19 10:05:271.6872549composite1.02060
2026-04-19 10:05:2414.33219,57,69,75,7,79,61,31,15,67,29,77,85,81,23,9527composite1.02060
2026-04-19 09:48:3421.55549,61,17,33,19,9,35,63,71,59,65,21,55,81,25,45,97,77,955prime1.02060
2026-04-19 09:48:125.43239,35,63,8137prime1.02060
2026-04-19 09:47:5027.4575511prime1.02060
2026-04-19 08:28:453.496767prime1.02060
2026-04-19 08:28:391.38141prime1.02060
2026-04-19 08:28:351.29859prime1.02060
2026-04-19 08:28:252.463691composite1.02060
2026-04-19 08:28:1212.76427,69,55,83,8157composite1.02060
2026-04-19 06:30:2460.18175time1.02060
2026-04-19 06:29:233.46431,3,41,73,81,8569composite1.02060
2026-04-19 06:29:200.65479,333composite1.02060
2026-04-19 06:29:190.44769composite1.02060
2026-04-19 06:29:180.7335,4745composite1.02060
2026-04-19 06:29:170.2551composite1.02060
2026-04-19 06:29:170.1521composite1.02060
2026-04-19 06:29:160.417175composite1.02060
2026-04-19 06:29:160.21621composite1.02060
2026-04-19 06:29:150.62453,4135composite1.02060
2026-04-19 06:29:140.4647935composite1.02060
2026-04-19 06:29:140.20621composite1.02060
2026-04-19 06:29:130.29863composite1.02060