Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
2055121No factors below 268
P-1
B1=3 600 000
B2=180 000 000
LL
StatusDateUserResidueShift
VerifiedJoel ArmengaudAFB06784DAA3847D0
VerifiedStephen WoodAFB06784DAA3847D0
Verified2015-11-13MadPooAFB06784DAA3847D1849150
Assigned
AssignedUserWork TypeStage% DoneUpdatedExpired
2021-03-13-Anonymous-factor ECM small0.0 % 2021-03-132021-05-12
History
DateUserTypeResult
2019-03-24chuenkitNFno factor from 2^67 to 2^68
2017-03-06mikrNF-PM1B1=3600000, B2=180000000, E=12
2017-01-31mikrNF-PM1B1=2500000, B2=125000000, E=12
2016-11-06Jocelyn LaroucheNF-PM1B1=324000
2016-09-22Jocelyn LaroucheNF-PM1B1=270000, B2=5832000, E=6
2016-08-18Gordon SpenceNFno factor from 2^66 to 2^67
2016-05-15Jocelyn LaroucheNF-PM1B1=270000, B2=4860000, E=6
2016-02-23Mark RoseNFno factor from 2^1 to 2^60
2015-11-13MadPooC-LLAFB06784DAA3847D
2015-11-03ramgeisNFno factor from 2^65 to 2^66
2015-04-21VictordeHollanderNFno factor from 2^64 to 2^65
2015-04-21VictordeHollanderNFno factor from 2^63 to 2^64
2014-10-26Jocelyn LaroucheNF-PM1B1=166231
2013-09-01ramgeisNFno factor from 2^62 to 2^63
2012-03-11Sebastian HornbostelNFno factor from 2^61 to 2^62
2011-01-21James HeinrichNF-PM1B1=135000, B2=2902500, E=6
2011-01-06Jocelyn LaroucheNF-PM1B1=50000
2010-12-26Jocelyn LaroucheNF-PM1B1=30000
2009-06-21harleeNF-PM1B1=20000, B2=260000
2009-01-02Sturle SundeNFno factor from 2^60 to 2^61
2006-01-15Jocelyn LaroucheNF-PM1B1=4000
2003-02-24-Anonymous-NF-PM1B1=2048, B2=204800, E=12