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-2025-11-24.zip (17MB)

All-time stats

8191552 attempts

Reason for ending Frequency
composite485872459%
prime306752837%
time2638693%
Final number Reason for ending Frequency
87composite94411611.53%
51composite3873484.73%
57composite3840694.69%
39composite2535293.1%
1composite2508043.06%
63composite2046182.5%
49composite2010392.45%
69composite1884492.3%
5prime1873792.29%
27composite1762572.15%
9composite1761632.15%
59prime1713412.09%
79prime1633361.99%
67prime1563981.91%
29prime1534981.87%
47prime1497191.83%
21composite1476631.8%
61prime1464671.79%
53prime1449991.77%
77composite1437641.76%

100 most recent attempts

Time finished Time taken Sequence Final number Reason for ending Difficulty Max. number Time allowed
2026-02-24 20:17:4114.30127,33,49,23,67,17,55,35,2591composite1.02060
2026-02-24 20:17:2628.0343,3,25,27,77,61,55,59,37,33,47,71,69,95,63,11,15,75,7,81,587composite1.02060
2026-02-24 20:16:5534.31215,69,7,83,17,73,65,37,75,71,53,45,47,19,79,63,23,93,57,55,77,113119composite1.02060
2026-02-24 20:16:204.0651739composite1.02060
2026-02-24 19:55:252.366779prime10120
2026-02-24 19:55:211.95379prime10120
2026-02-24 19:55:181.58869composite10120
2026-02-24 19:55:153.0813541prime10120
2026-02-24 19:55:104.56533,51,7,27,4547prime10120
2026-02-24 19:55:052.24657composite10120
2026-02-24 19:54:593.09271prime10120
2026-02-24 19:54:551.11173prime10120
2026-02-24 19:54:293.0887567prime10120
2026-02-24 19:54:252.7886541prime10120
2026-02-24 19:54:2114.4773967prime10120
2026-02-24 19:54:061.11361prime10120
2026-02-24 19:54:042.30977composite10120
2026-02-24 19:54:001.611prime10120
2026-02-24 19:53:3256.35711,19,17,7,3,15,9,1,7,19,55,25,371,1457,145,6739,8073,123955,134961,588741,2396881,5739755,18962337,15787149,60185421474733723prime30100
2026-02-24 19:53:320.2013prime30100
2026-02-24 19:52:174.6781,19,39109prime30100
2026-02-24 19:52:112.268119prime30100
2026-02-24 19:52:065.5451,35,9161composite30100
2026-02-24 19:51:585.6131,39,51,3211009prime30100
2026-02-24 19:51:522.592125composite30100
2026-02-24 19:51:188.8021,25,79,3,303183composite20120
2026-02-24 19:51:067.0791,27,11,21109prime20120
2026-02-24 19:50:5815.24835,27,31,47,33,1763composite1.02060
2026-02-24 19:50:420.7461prime1.02060
2026-02-24 19:50:410.55613prime1.020120
2026-02-24 19:50:400.79561prime1.020120
2026-02-24 19:50:400.62165composite1.02060
2026-02-24 19:50:393.61525,51,21,45,6983prime1.020120
2026-02-24 19:50:391.89453,599composite1.02060
2026-02-24 19:50:370.85437prime1.02060
2026-02-24 19:50:3519.2399,33,67,51,23,6549composite1.02060
2026-02-24 19:50:262.139121composite1.020120
2026-02-24 19:50:232.0391,913prime1.020120
2026-02-24 19:50:153.76755,3349composite1.02060
2026-02-24 19:50:110.9453prime1.02060
2026-02-24 19:50:095.71819,27,6749composite1.02060
2026-02-24 19:49:511.49673prime1.02060
2026-02-24 19:49:498.12927,25,75,3,65,3389prime1.02060
2026-02-24 19:49:401.56665composite1.02060
2026-02-24 19:49:3833.56219,43,59,31,75,87,79,37,17,11,93,69,25,95,41,55,85,21,111,99,33105composite1.02060
2026-02-24 19:49:0312.79639,63,57,15,19,4137prime1.02060
2026-02-24 19:48:4814.6223,73,57,11,53,41,2139composite1.02060
2026-02-24 19:48:1147.37111,53,17,3,55,23,15,31,19,1,63,95,49,35,7,39,27,77,79,85,33,21,89,105,81,91,117,7351composite1.02060
2026-02-24 19:47:170.3587543prime1.02060
2026-02-24 19:47:170.28943prime1.02060
2026-02-24 19:47:160.56115,3923prime1.02060
2026-02-24 19:47:160.1617prime1.02060
2026-02-24 19:46:4740.93831,59,3,13,23,75,55,15,53,57,11,49,99,37,101,4783prime1.02060
2026-02-24 19:45:594.68679,1377composite1.02060
2026-02-24 19:45:5311.77871,13,69,23,45,87,6591composite1.02060
2026-02-24 19:45:412.67267,2927composite1.02060
2026-02-24 19:45:227.88773,43,33,55,5351composite1.02060
2026-02-24 19:45:138.22923,67,77,1383prime1.02060
2026-02-24 19:44:4552.35129,69,77,53,63,59,17,39,13,45,41,93,97,1,73,107,31,55,49,71,11,19,67,81,99,83,65133composite1.02060
2026-02-24 19:43:4920.719,45,47,43,55,73,75,3,7,19,5957composite1.02060
2026-02-24 19:40:475.16667,7739composite10163
2026-02-24 19:40:3870.80471,37,13,55,67,77,69,45,25,17,43,53,11,31,57,35,29,21,5,9,77,17,7,61,939composite10163
2026-02-24 19:39:0735.27535,15,63,45,3,33,1,21,67,43,73,27,39,9,4149composite1060
2026-02-24 19:38:011.1896529prime1.02060
2026-02-24 19:37:590.65173prime1.02060
2026-02-24 19:37:581.2262517prime1.02060
2026-02-24 19:37:565.2941,8167prime1.02060
2026-02-24 19:37:502.3416973prime1.02060
2026-02-24 19:37:472.35557,9,3311prime1.02060
2026-02-24 19:37:442.64453prime1.02060
2026-02-24 19:37:406.1123,7717prime1.02060
2026-02-24 19:37:073.5389composite1.02060
2026-02-24 19:37:0210.48377,15,75,55,9,2739composite1.02060
2026-02-24 19:36:3730.54771,61,65,83,55,27,25,45,47,53,3,33,69,79,8951composite1.02060
2026-02-24 19:36:0111.76427,9,35,41,2351composite1.02060
2026-02-24 19:34:555.63871prime1.02060
2026-02-24 19:34:4622.327,75,81,41,23,15,85,59,43,27,61,2539composite1.02060
2026-02-24 19:34:2215.37629,61,71,35,27,31,77,41,3,65,3337prime1.02060
2026-02-24 19:33:4419.9251,69,45,27,85,33,41,15,29,5,63,8939composite1.02060
2026-02-24 19:31:419.42631,63,3,19,11,51,8983prime1.02060
2026-02-24 19:31:302.929composite1.02060
2026-02-24 19:08:5560.7423time1.02060
2026-02-24 19:07:5033.2717,3,51,13,79,19,65,91,39,25,75,57,9,35,59,53,61,95,93101prime1.02060
2026-02-24 19:07:165.18365,7157composite1.02060
2026-02-24 19:07:103.5215969composite1.02060
2026-02-24 18:32:3034.4527,15,55,67,83,23,9,31,79,43,3797prime1.02060
2026-02-24 18:32:1913.66719,25,63,35,73,1,83,33,85,69,81,41,57,55,1397prime1.02060
2026-02-24 18:32:051.435691composite1.02060
2026-02-24 18:32:034.26953,39,11,7951composite1.02060
2026-02-24 18:31:583.57273,45,61,4931prime1.02060
2026-02-24 18:29:0732.5321,5,53,75,73,71,17,21,43,55,35,15,69,63,91,23,9,107,93,109,25,37,115,31,117,125,9751composite1.02060
2026-02-24 18:18:1860.01767,13,39,43,51,5,71,1,3,11,53,81,41,93,87,7,97,101,47,45,29,35,111,105,61,95,131,121,13519time1.02060
2026-02-24 18:15:2646.59229,57,21,9,81,25,41,83,87,43,67,11,47,65,27,77,85,89,95,97,55,71,45,33119composite1.02060
2026-02-24 18:14:562965.91125composite1.0204.56789e19
2026-02-24 18:14:3120.95771,57,13,19,3,29,75,15,1,4939composite1.02060
2026-02-24 17:25:294.739135composite1.0204.56789e19
2026-02-24 17:25:230.9611composite1.0204.56789e19
2026-02-24 17:25:211.8341composite1.0204.56789e19
2026-02-24 17:25:0313.2285351composite1.0201.23457e22
2026-02-24 17:24:170.51215composite1.02060