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:





MnDetails
37518857
Composite: proven not-prime with Lucas-Lehmer test
No factors below 273
TF target 271
P-1
B1 = 655000
B2 = 655000
LL
StatusDateUserResidueShiftSoftware
Bad2008-05-10Michael Krasilnikov3DF29F725E3BB8B529686466Windows,Prime95,v25 beta,(aka Wd1)
Verified2016-09-06DubslowAF5C19EC861741BA21510071Linux 64-bit,Prime95,v28.7,build 1
Verified2016-09-07XZTAF5C19EC861741BA14823802Windows 64-bit,Prime95,v28.9,build 2
History
DateUserTypeResult
2022-07-19TheJudgerNFno factor TF: 72-73
2022-05-19Architects CubedNFno factor TF: 71-72
2016-09-07XZTC-LLAF5C19EC861741BA
2016-09-06DubslowC-LLAF5C19EC861741BA
2014-03-02Jerry HallettNFno factor TF: 70-71
2013-11-24bayanneNFno factor TF: 69-70
2012-05-13megavinkNFno factor TF: 68-69
2012-05-13megavinkNFno factor TF: 67-68
2008-05-10mkrasC-LL3DF29F725E3BB8B5
2007-04-23-anonymous-NF-PM1B1=655000
2006-04-28TDH-DXLNFno factor TF: 1-67