Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

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MnStatusDetails
78926867Tested as composite (unverified): unconfirmed Lucas-Lehmer test says not-prime
TF
No factors below 276
TF target 275
P-1
B1 = 804000
B2 = 774767070
LL
StatusDateUserResidueShift
Unverified2017-01-10jonoju71C1F8973E5281__31987668
Assigned
AssignedUserWork TypeStage% DoneUpdatedExpired
2025-06-29dallaraLL double-checkLL79.31 % 2025-09-30
History
DateUserTypeResult
2025-07-09Sid & AndyNF
no factor from 2^75 to 2^76
2024-02-13Jason LynchNF-PM1
B1=804000, B2=774767070
2017-04-08James HeinrichNF-PM1
B1=305000, B2=5185000, E=6
2017-01-10jonojuC-LL
71C1F8973E5281__
2016-07-23-Anonymous-NF-PM1
B1=790000
2016-07-03TheJudgerNF
no factor from 2^74 to 2^75
2016-07-03TheJudgerNF
no factor from 2^73 to 2^74
2016-06-27CacheOutNF
no factor from 2^72 to 2^73
2016-02-11RichD0NF
no factor from 2^71 to 2^72
2013-02-11Clown_RoyalNF
no factor from 2^70 to 2^71
2011-01-22vapaddyNF
no factor from 2^69 to 2^70
2011-01-22biszczukNF
no factor from 2^68 to 2^69
2011-01-18lindedNF
no factor from 2^67 to 2^68
2010-11-17stefan_2106NF
no factor from 2^66 to 2^67
2010-11-15Charles A. MorrisNF
no factor from 2^65 to 2^66
2010-11-13Fred CireraNF
no factor from 2^64 to 2^65
2008-06-16-Anonymous-NF
no factor to 2^64