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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
74340751Tested as composite (unverified): unconfirmed Lucas-Lehmer test says not-prime
TF
No factors below 275
TF target 274
P-1
B1 = 1800000
B2 = 1177928640
LL
StatusDateUserResidueShift
Unverified2017-03-05heiopeiF625BB7FC902F2__3340529
Assigned
AssignedUserWork TypeStage% DoneUpdatedExpired
2024-10-14-Anonymous-LL double-checkLL22.15 % 2025-06-23
History
DateUserTypeResult
2025-05-19JurzalNF-PM1
B1=1800000, B2=1177928640
2017-03-05heiopeiC-LL
F625BB7FC902F2__
2016-07-08-Anonymous-NF
no factor from 2^74 to 2^75
2014-09-02James HeinrichNF-PM1
B1=685000, B2=14042500, E=6
2013-12-07La GüiraNF
no factor from 2^73 to 2^74
2013-12-07La GüiraNF
no factor from 2^72 to 2^73
2013-12-07La GüiraNF
no factor from 2^71 to 2^72
2013-12-07La GüiraNF
no factor from 2^70 to 2^71
2013-05-11PascalBieriNF
no factor from 2^69 to 2^70
2010-12-03Kelly LowderNF
no factor from 2^68 to 2^69
2010-11-29Helmut ZulusNF
no factor from 2^67 to 2^68
2010-09-16Manfred FNF
no factor from 2^66 to 2^67
2010-09-14Per JessenNF
no factor from 2^65 to 2^66
2010-07-06David Hdez MorenoNF
no factor from 2^64 to 2^65
2008-09-12lycornNF
no factor to 2^64