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
37979873
Composite: proven not-prime with Lucas-Lehmer test
No factors below 273
TF target 271
P-1
B1 = 725000
B2 = 16312500
LL
StatusDateUserResidueShiftSoftware
Verified2008-01-15C. Cooper / S. BooneE36E640775E9663D31324876Windows,Prime95,v24 final,NT service,(aka Wc5)
Verified2014-08-26DubslowE36E640775E9663D37553159Linux 64-bit,Prime95,v28.5,build 2
History
DateUserTypeResult
2022-07-05RichD0NFno factor TF: 72-73
2018-05-30Architects CubedNF-PM1B1=725000, B2=16312500, E=12
2018-05-24Architects CubedNFno factor TF: 71-72
2014-08-26DubslowC-LLE36E640775E9663D
2014-04-03Jerry HallettNFno factor TF: 70-71
2014-04-03Jerry HallettNFno factor TF: 69-70
2008-01-15curtiscC-LLE36E640775E9663D
2007-03-20AmperioNF-PM1B1=545000
2006-06-13-anonymous-NFno factor TF: 1-69