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
37952983
Composite: proven not-prime with Lucas-Lehmer test
No factors below 274
TF target 271
P-1
B1 = 840000
B2 = 21000000
LL
StatusDateUserResidueShiftSoftware
Verified2007-09-13Ahmer AliB9DF44560644A25932729986Windows,Prime95,v23,NT service,(aka WZ5)
Verified2016-10-30DubslowB9DF44560644A25913319042Linux 64-bit,Prime95,v28.7,build 1
History
DateUserTypeResult
2016-10-30DubslowC-LL
B9DF44560644A259
2016-10-24Bruno 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
2014-04-06Jerry HallettNFno factor TF: 70-71
2014-04-06Jerry HallettNFno factor TF: 69-70
2007-09-13ahmeraliC-LL
B9DF44560644A259
2007-07-04ahmeraliNFno factor TF: 1-69
2007-07-04ahmeraliNF-PM1B1=355000, B2=2662500
2006-07-25Team Prime RibNFno factor TF: 1-68
2006-07-10Team Prime RibNFno factor TF: 1-68