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Text of the page (random words):
the boinc software used by primegrid when prompted enter the url http www primegrid com select which subprojects to run via the primegrid preferences if you are not using graphics enabled boinc client you may use manual registration form returning participants your account prpnet server manual sieving create or join a team download boinc applications make a donation community participant profiles primegrid message boards primegrid discord chat server external primegrid wiki external mersenneforum org forums external leader boards challenge series top countries top participants top computers top teams top prime finders results primegrid mega primes primegrid primes by project primegrid ap27 primegrid wieferich wss published results other server status subproject status task status fastest gpus fastest cpus computer types drummers lowrise digits prime rank 1 app types sub project available tasks a 2 b 3 4 5 utc time 2026 07 11 03 17 30 7 754 079 17 cpu mt f 321 prime search llr 782 1000 user count 357 802 4 141 675 83 cpu mt f compositorial prime search 1500 52k host count 891 754 8 804 795 15 cpu mt f cullen prime search llr 764 14k hosts per user 2 49 9 222 733 14 cpu mt f extended sierpinski problem llr 833 25k tasks in progress 121 943 3 732 288 126 cpu mt f factorial prime search 1659 5079 primes discovered 101 475 8 324 928 15 cpu mt f generalized cullen woodall prime search llr 758 1000 primes reported 6 at t5k 38 078 12 206 697 9 cpu mt f prime sierpinski problem llr 409 6075 mega primes discovered 3 692 4 411 195 73 cpu mt f primorial prime search 1530 17k teraflops 2 691 869 1 402 787 920 cpu mt f proth prime search llr 1515 242k 715 387 5k cpu mt f proth prime search extended llr 3988 443k 14 239 805 6 cpu mt f seventeen or bust llr 428 7608 primegrid s 2026 challenge series world snake day challenge jul 16 16 00 00 to jul 21 15 59 59 utc time until world snake day challenge days hours min sec standings national egg day challenge 321 individuals teams 4 524 849 71 cpu mt f sierpinski riesel base 5 problem llr 1501 271k 5 118 878 52 cpu mt f the riesel problem llr 1012 2000 8 077 410 16 cpu mt f woodall prime search llr 769 3769 gpu factorial compositorial sieve 1998 cpu sierpinski riesel base 5 problem sieve 995 574 963 5k cpu mt f gpu f generalized fermat prime search n 16 1488 919k 1 139 678 1426 cpu mt f gpu f generalized fermat prime search n 17 mega 5003 585k 2 090 148 359 cpu mt f gpu f generalized fermat prime search n 18 1006 146k 3 879 063 99 cpu mt f gpu f generalized fermat prime search n 19 1009 69k 7 175 620 20 cpu mt f gpu f generalized fermat prime search n 20 1023 4429 13 483 984 6 cpu mt4 f gpu f generalized fermat prime search n 21 419 1671 24 272 443 3 cpu mt4 f gpu f generalized fermat prime search n 22 212 7454 43 985 121 1 gpu f do you feel lucky n 23 214 4862 cpu mt gpu ap27 search 1490 1 prime rank is where the leading edge candidate if prime would appear in the top 5000 primes list 5k means the primes are too small to make the list 2 first available tasks number a is the number of tasks immediately available to send 3 second available tasks number b is additional candidates that have not yet been turned into workunits if the first number a is 0 something is broken if both numbers are 0 we ve run out of work 4 underlined work is loaded manually if the b number is not underlined new candidates b are also automatically created from sieve files which typically contain millions of candidates if b is infinite there s essentially an unlimited amount of work available 5 one or two tasks a are generated automatically from each candidate b when needed so the total number of tasks available without manual intervention is either a b or a 2 b normally two tasks are created for each candidate however only 1 task is created if fast proof tasks are used as designated by an f next to cpu or gpu 6 includes all primes ever reported by primegrid to top 5000 primes list many of these are no longer in the top 5000 f uses fast proof tasks so no double check is necessary everyone is first mt multithreading via web based preferences is available mt4 multithreading via web based preferences is mandatory requiring a minimum of 4 threads about primegrid s primary goal is to advance mathematics by enabling everyday computer users to contribute their system s processing power towards prime finding by simply downloading and installing boinc and attaching to the primegrid project participants can choose from a variety of prime forms to search with a little patience you may find a large or even record breaking prime and enter into chris caldwell s the largest known primes database with a multi million digit prime primegrid s secondary goal is to provide relevant educational materials about primes additionally we wish to contribute to the field of mathematics lastly primes play a central role in the cryptographic systems which are used for computer security through the study of prime numbers it can be shown how much processing is required to crack an encryption code and thus to determine whether current security schemes are sufficiently secure primegrid is currently running several sub projects 321 prime search searching for mega primes of the form 3 2 n 1 cullen woodall search searching for mega primes of forms n 2 n 1 and n 2 n 1 generalized cullen woodall search searching for mega primes of forms n b n 1 and n b n 1 where n 2 b extended sierpinski problem helping solve the extended sierpinski problem generalized fermat prime search searching for mega primes of the form b 2 n 1 prime sierpinski project helping the prime sierpinski project solve the prime sierpinski problem proth prime search searching for primes of the form k 2 n 1 seventeen or bust helping to solve the sierpinski problem sierpinski riesel base 5 helping to solve the sierpinski riesel base 5 problem the riesel problem helping to solve the riesel problem ap27 search searching for record length arithmetic progressions of primes you can choose the projects you would like to run by going to the project preferences page recent significant primes on 16 april 2025 11 37 45 utc primegrid s generalized cullen woodall primesearch found the largest known generalized cullen prime 4052186 69 4052186 1 the prime is 7 451 366 digits long and will enter the largest known primes database ranked 1st for generalized cullen primes and 16th overall this is the second largest prime ever found by primegrid base 69 was one of 9 primeless generalized cullen bases for b 121 that primegrid is searching the remaining bases are 13 29 47 49 55 101 109 121 the discovery was made by mark williams markfw of the united states using 8 cores of an amd epyc 9554 64 core processor with 196gb ram running microsoft windows 10 professional x64 edition this computer took about 10 hours 15 minutes to complete the probable prime prp test using prst mark is a member of team anandtech the prp was confirmed prime on 17 april 2025 by an amd ryzen 9 7950x3d 4 20ghz with 128gb ram running debian 12 5 this computer using 8 cores took 12 hours and 32 minutes to complete the primality test using prst for more information please see the official announcement on 8 april 2025 12 49 49 utc primegrid s sierpiński riesel base 5 problem project eliminated k 67612 by finding the mega prime 67612 5 5501582 1 the prime is 3 845 446 digits long and will enter the largest known primes database ranked 92nd overall 27 k s now remain in the sierpiński base 5 problem the discovery was made by kai presler aperture_science_innovators of australia using 8 cores of an amd ryzen 9 7945hx with 14gb ram running linux mint 21 3 this computer took about 1 hour 24 minutes to complete the probable prime prp test using prst kai is a member of team h ard ocp the prp was confirmed prime on 8 april 2025 20 19 10 utc by an amd ryzen 9 7950x3d 4 20ghz with 128gb ram running debian 12 5 this computer using 4 cores took 3 hours and 44 minutes to complete the primality test using llr2 for more information please see the official announcement on 3 march 2025 07 53 17 utc primegrid s generalized fermat prime search found the mega prime 13427472 524288 1 the prime is 3 737 122 digits long and will enter the largest known primes database ranked 15th for generalized fermat primes and 94th overall the discovery was made by jean luc garambois af amis des lapins jean luc of france using an nvidia geforce rtx 4080 super in an amd ryzen threadripper 3990x 64 core processor with 256gb ram running linux ubuntu 22 04 5 lts this computer took about 15 minutes and 23 seconds to complete the probable prime prp test using genefer22 jean luc is a member of the l alliance francophone team the prp was confirmed prime on 17 april 2025 by an amd ryzen 9 7950x3d 4 20ghz with 128gb ram running debian 12 5 this computer took about 20 hours 35 minutes to complete the primality test using llr for more information please see the official announcement other significant primes 3 2 20928756 1 321 official announcement 321 3 2 18924988 1 321 official announcement 321 3 2 18196595 1 321 official announcement 321 3 2 17748034 1 321 official announcement 321 3 2 16819291 1 321 official announcement 321 27 2 8342438 1 27121 official announcement 27121 121 2 9584444 1 27121 official announcement 27121 27 2 7046834 1 27121 official announcement 27121 27 2 5213635 1 27121 official announcement 27121 27 2 4583717 1 27121 official announcement 27121 277699295941594831 170826477 23 n for n 0 26 ap27 official announcement 224584605939537911 81292139 23 n for n 0 26 ap27 official announcement 48277590120607451 37835074 23 n for n 0 25 ap26 official announcement 142099325379199423 16549135 23 n for n 0 25 ap26 official announcement 149836681069944461 7725290 23 n for n 0 25 ap26 official announcement 6679881 2 6679881 1 cul official announcement cullen 6328548 2 6328548 1 cul official announcement cullen 202705 2 21320516 1 esp official announcement k 202705 eliminated 99739 2 14019102 1 esp official announcement k 99739 eliminated 193997 2 11452891 1 esp official announcement k 193997 eliminated 161041 2 7107964 1 esp official announcement k 161041 eliminated 147855 1 fps official announcement factorial 110059 1 fps official announcement factorial 103040 1 fps official announcement factorial 94550 1 fps official announcement factorial 27 2 7963247 1 pps div official announcement fermat divisor 13 2 5523860 1 pps div official announcement fermat divisor 193 2 3329782 1 pps mega official announcement fermat divisor 57 2 2747499 1 pps official announcement fermat divisor 267 2 2662090 1 pps official announcement fermat divisor 2525532 73 2525532 1 gc official announcement generalized cullen 2805222 25 2805222 1 gc official announcement generalized cullen 1806676 41 1806676 1 gc official announcement generalized cullen 1323365 116 1323365 1 gc official announcement generalized cullen 1341174 53 1341174 1 gc official announcement generalized cullen 11937916 524288 1 gfn official announcement generalized fermat prime 9332124 524288 1 gfn official announcement generalized fermat prime 10913140 524288 1 gfn official announcement generalized fermat prime 8630170 524288 1 gfn official announcement generalized fermat prime 6339004 524288 1 gfn official announcement generalized fermat prime 563528 13 563528 1 gw official announcement generalized woodall 404882 43 404882 1 gw official announcement generalized woodall 6369619 1 prs official announcement primorial 6354977 1 prs official announcement primorial 5256037 1 prs official announcement primorial 4778027 1 prs official announcement primorial 4328927 1 prs official announcement primorial 25 2 8788628 1 pps div official announcement top 100 prime 17 2 8636199 1 pps div official announcement top 100 prime 25 2 8456828 1 pps div official announcement top 100 prime 39 2 8413422 1 pps div official announcement top 100 prime 31 2 8348000 1 pps div official announcement top 100 prime 168451 2 19375200 1 psp official announcement k 168451 eliminated 10223 2 31172165 1 sob official announcement k 10223 eliminated 2996863034895 2 1290000 1 sgs official announcement twin 2618163402417 2 1290000 1 sgs 2618163402417 2 1290001 1 2p 1 official announcement sophie germain 18543637900515 2 666667 1 sgs 18543637900515 2 666668 1 2p 1 official announcement sophie germain 3756801695685 2 666669 1 sgs official announcement twin 65516468355 2 333333 1 tps official announcement twin 63838 5 3887851 1 sr5 official announcement k 63838 eliminated 273662 5 3493296 1 sr5 official announcement k 273662 eliminated 102818 5 3440382 1 sr5 official announcement k 102818 eliminated 109838 5 3168862 1 sr5 official announcement k 109838 eliminated 118568 5 3112069 1 sr5 official announcement k 118568 eliminated 9221 2 11392194 1 trp official announcement k 9221 eliminated 146561 2 11280802 1 trp official announcement k 146561 eliminated 273809 2 8932416 1 trp official announcement k 273809 eliminated 502573 2 7181987 1 trp official announcement k 502573 eliminated 402539 2 7173024 1 trp official announcement k 402539 eliminated 17016602 2 17016602 1 woo official announcement woodall 3752948 2 3752948 1 woo official announcement woodall 2367906 2 2367906 1 woo official announcement woodall 2013992 2 2013992 1 woo official announcement woodall news world snake day challenge from july 16 16 00 to july 21 16 00 primegrid will be running a 5 day challenge on the factorial prime search project for more information please see this forum thread 5 jul 2026 9 20 02 utc comment national egg day challenge from june 3 21 00 to june 10 21 00 primegrid will be running a 7 day challenge on the 321 prime search llr project for more information please see this forum thread 27 may 2026 12 01 27 utc comment windows arm suppport for gfn apps primegrid is happy to announce the release of arm apps for windows for many gfn apps that support gpu tasks we now offer windows arm applications just select the cpu tasks in the project preferences page the list of gfn apps that support windows arm is subject to change for the most up to date list see the applications page look for microsoft windows running on an arm 64 bit cpu 27 apr 2026 19 26 09 utc comment telephone challenge from march 7 10 00 to march 17 10 00 primegrid will be running a 10 day challenge on the seventeen or bust llr project for more information please see this forum thread 2 mar 2026 9 07 47 utc comment tour de primes 2026 february is almost upon us and with it primegrid s annual tour de primes this is a month long event where all can earn special tour de primes badges and a lucky few will win the coveted tour de primes jerseys more information can be found here 26 jan 2026 15 02 45 utc comment more news is available as an rss feed newly reported primes mega primes are in bold 592964352 65536 1 azmodes 405 2 4656611 1 valterc 413 2 4655781 1 khs 6561 2 2376057 1 ryan propper 543 2 4649628 1 valterc 3027 2 2376278 1 ryan pro...