Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
340927Factored
FactorDigitsBitsDate
12504448206907763317757528526499333106.62019-03-27 23:22:13
ECM
DigitsB1Curves
2550000280 / 280
30250000398 / 640
Estimated T-Level: 28.1 ⓘ
TF below 2^88 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski26780
Verified (Factored)Anneke M.Th. HarbersDD396B3B1CEBA6780
Verified (Factored)John SweeneyDD396B3B1CEBA6780
Verified (Factored)Mike GachDD396B3B1CEBA6780
Verified (Factored)Eivind TrielDD396B3B1CEBA678193308
Verified (Factored)2016-06-01MadPooDD396B3B1CEBA678127501
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2019-03-28trebor67FF78531738BC64131339053
Verified2019-03-28fdlr67FF78531738BC64131896053
History
DateUserTypeResult
2019-03-28fdlrC-PRP
M340927/125044482069077633177575285264993 : 67FF78531738BC64
PRP: Verified
PRP without proof (small exponent)
2019-03-28treborC-PRP
M340927/125044482069077633177575285264993 : 67FF78531738BC64
PRP: Verified
PRP without proof (small exponent)
2019-03-27alexF-ECM
Factor: 125044482069077633177575285264993 / (ECM curve 218, B1=250000, B2=25000000, Sigma=6911346269017977)
2018-02-16Gordon SpenceNF
no factor from 2^64 to 2^65
2016-09-30mikrNF-PM1
B1=60000000, B2=3000000000, E=12
2016-06-01MadPooC-LL
DD396B3B1CEBA678
2015-12-16Gordon SpenceNF
no factor from 2^63 to 2^64
2015-12-16Gordon SpenceNF
no factor from 2^62 to 2^63
2015-07-25NRNF
no factor from 2^61 to 2^62
2013-05-29Sid & AndyNF
no factor from 2^60 to 2^61
2012-02-11alpertronNF-PM1
B1=10000000, B2=200000000, E=12
2011-08-10JossNF-PM1
B1=1340853
2009-01-25Sturle SundeNF
no factor from 2^59 to 2^60
2008-12-31Sturle SundeNF
no factor from 2^58 to 2^59