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
42351877
Composite: proven not-prime with Lucas-Lehmer test
No factors below 274
TF target 272
P-1
B1 = 710000
B2 = 710000
LL
StatusDateUserResidueShiftSoftware
Bad2010-06-19David_HarveyC3076F9F059E839531884594Windows,Prime95,v25.11,build 2
Verified2015-10-23George WoltmanA9654F049DA24B8338492433Windows 64-bit,Prime95,v28.6,build 1
Verified2016-09-14Mark RoseA9654F049DA24B8316837952Linux 64-bit,Prime95,v28.9,build 2
History
DateUserTypeResult
2020-01-10-anonymous-NFno factor TF: 73-74
2018-08-08-anonymous-NFno factor TF: 72-73
2016-09-14Mark RoseC-LLA9654F049DA24B83
2015-10-23George WoltmanC-LLA9654F049DA24B83
2015-07-28GregNFno factor TF: 71-72
2015-03-16Mark RoseNFno factor TF: 70-71
2015-02-14Architects CubedNFno factor TF: 69-70
2014-03-07LaurVNFno factor TF: 68-69
2010-06-19David_HarveyC-LLC3076F9F059E8395
2009-03-30-anonymous-NF-PM1B1=710000
2007-07-04ITSNFno factor TF: 1-68