Marin Mersenne 2^P-1
Username
Password
Forgot password?
Black
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
79221617Tested as composite (unverified): unconfirmed Lucas-Lehmer test says not-prime
TF
No factors below 276
TF target 275
P-1
B1 = 670000
B2 = 13567500
LL
StatusDateUserResidueShift
Unverified2018-04-26Dax MickelsonDFEF2848A4C7D8__29072029
Assigned
AssignedUserWork TypeStage% DoneUpdatedExpired
2025-10-24Ra1nb0wLL double-checkLL37.50 % 2025-10-26
History
DateUserTypeResult
2025-08-01ElectricBillNF
no factor from 2^75 to 2^76
2018-04-26Dax MickelsonC-LL
DFEF2848A4C7D8__
2016-09-12FilenNF-PM1
B1=670000, B2=13567500, E=12
2016-08-23A_SavchenkoNF
no factor from 2^74 to 2^75
2016-08-23A_SavchenkoNF
no factor from 2^73 to 2^74
2016-07-22cuBerBruceNF
no factor from 2^72 to 2^73
2016-04-05Mark RoseNF
no factor from 2^63 to 2^64
2016-04-05Mark RoseNF
no factor from 2^64 to 2^65
2016-02-19GregNF
no factor from 2^71 to 2^72
2013-01-23phoenicisNF
no factor from 2^70 to 2^71
2010-12-03Sid & AndyNF
no factor from 2^69 to 2^70
2010-11-28Sid & AndyNF
no factor from 2^68 to 2^69
2010-11-25Fred CireraNF
no factor from 2^67 to 2^68
2010-11-21BisisNF
no factor from 2^66 to 2^67
2010-11-16S00030NF
no factor from 2^65 to 2^66