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
37955639
Composite: proven not-prime with Lucas-Lehmer test
No factors below 274
TF target 271
P-1
B1 = 840000
B2 = 21000000
LL
StatusDateUserResidueShiftSoftware
Verified2007-10-29Kostas G. GavrielidisE6E4C447C131764B8647395Windows,Prime95,v24 final,(aka Wc1)
Verified2016-10-30DubslowE6E4C447C131764B22643191Linux 64-bit,Prime95,v28.7,build 1
History
DateUserTypeResult
2024-05-26LaurVNFno factor TF: 68-69
2016-10-30DubslowC-LLE6E4C447C131764B
2016-10-25Bruno VictalNF-PM1B1=840000, B2=21000000, E=12
2016-10-24Bruno VictalNFno factor TF: 73-74
2016-10-24Bruno VictalNFno factor TF: 72-73
2016-10-24Bruno VictalNFno factor TF: 71-72
2016-10-24Bruno VictalNF-PM1B1=420000, B2=10500000, E=12
2014-04-06Jerry HallettNFno factor TF: 70-71
2014-04-06Jerry HallettNFno factor TF: 69-70
2013-09-04Carsten KossendeyNFno factor TF: 68-69
2007-10-29-anonymous-C-LLE6E4C447C131764B
2007-09-13-anonymous-NF-PM1B1=410000, B2=4817500
2006-06-13marnesNFno factor TF: 1-68