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
37518583
Composite: proven not-prime with Lucas-Lehmer test
No factors below 273
TF target 271
P-1
B1 = 400000
B2 = 12000000
LL
StatusDateUserResidueShiftSoftware
Verified2007-09-28C. Cooper / S. Boone05B954D8CF9B409624203054Windows,Prime95,v24 final,NT service,(aka Wc5)
Verified2016-09-06Dubslow05B954D8CF9B409615856743Linux 64-bit,Prime95,v28.7,build 1
History
DateUserTypeResult
2022-05-20Sid & AndyNFno factor TF: 71-72
2022-05-20Sid & AndyNFno factor TF: 72-73
2016-09-06DubslowC-LL05B954D8CF9B4096
2016-03-08HBendtzNF-PM1B1=400000, B2=12000000, E=12
2014-03-02Jerry HallettNFno factor TF: 70-71
2013-11-23bayanneNFno factor TF: 69-70
2013-07-14Norman LeyNFno factor TF: 68-69
2012-04-29Carsten KossendeyNFno factor TF: 67-68
2007-09-28curtiscC-LL05B954D8CF9B4096
2007-07-24curtiscNF-PM1B1=655000
2006-04-28Team Prime RibNFno factor TF: 1-67