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
42501857
Composite: proven not-prime with Lucas-Lehmer test
No factors below 273
TF target 272
P-1
B1 = 770000
B2 = 16362500
LL
StatusDateUserResidueShiftSoftware
Verified2008-08-07Brandon HarrisEAF4680E8E9C49B88149446Windows,Prime95,v25 beta,(aka Wd1)
Verified2018-01-29DubslowEAF4680E8E9C49B85532848Linux 64-bit,Prime95,v28.7,build 1
History
DateUserTypeResult
2018-02-16Architects CubedNF-PM1B1=770000, B2=16362500, E=12
2018-02-15Architects CubedNFno factor TF: 72-73
2018-01-29DubslowC-LLEAF4680E8E9C49B8
2015-08-27-anonymous-NFno factor TF: 71-72
2015-03-03Mark RoseNFno factor TF: 70-71
2015-02-23BdotNFno factor TF: 69-70
2014-03-07LaurVNFno factor TF: 68-69
2008-08-07BranMuffinC-LLEAF4680E8E9C49B8
2008-03-29BranMuffinNF-PM1B1=710000
2007-06-15Philippe.RoseNFno factor TF: 1-68