Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
74207281Mersenne Prime!
LL
StatusDateUserResidueShift
Verified2015-09-17curtisc000000000000000055126939
History
DateUserTypeResult
2024-01-29Morgan SteelNF
no factor from 2^63 to 2^64
2024-01-29Morgan SteelNF
no factor from 2^0 to 2^63
2016-10-14SADMASTERNF
no factor from 2^68 to 2^69
2015-09-17curtiscP-LL
M74207281 is prime!
2015-06-14TheJudgerNF-PM1
B1=640000, B2=12640000, E=6
2015-06-07kdgehmanNF
no factor from 2^74 to 2^75
2015-06-07kdgehmanNF
no factor from 2^73 to 2^74
2015-06-07kdgehmanNF
no factor from 2^72 to 2^73
2015-06-07kdgehmanNF
no factor from 2^71 to 2^72
2013-05-10SMoffatNF
no factor from 2^70 to 2^71
2012-10-23Clown_RoyalNF
no factor from 2^69 to 2^70
2011-01-04SADMASTERNF
no factor from 2^68 to 2^69
2010-09-01GrunwalderGIMPNF
no factor from 2^67 to 2^68
2010-08-31ANONYMOUSNF
no factor from 2^66 to 2^67
2010-08-27fswebNF
no factor from 2^65 to 2^66
2010-08-25PalantsevichNF
no factor from 2^64 to 2^65
2008-09-12lycornNF
no factor to 2^64