Marin Mersenne 2^P-1
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MnStatusDetails
347173Factored
FactorDigitsBitsDate
6277481843923027712006498812789.02019-04-02 08:04:23
ECM
DigitsB1Curves
2550000280 / 280
30250000302 / 640
Estimated T-Level: 27.4 ⓘ
TF below 2^86 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski5D70
Verified (Factored)Unknown05D70
Verified (Factored)Guillermo Ballester ValorF48BF854168885D70
Verified (Factored)Eivind TrielF48BF854168885D7100449
Verified (Factored)2002-02-03Dennis PopeF48BF854168885D763882
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2019-04-02ATHDC8D37DC2617D10C133946153
Verified2019-04-06Chang Chia-TcheDC8D37DC2617D10C118570453
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2019-04-06Chang Chia-TcheC-PRP
M347173/627748184392302771200649881 : DC8D37DC2617D10C
PRP: Verified
PRP without proof (small exponent)
2019-04-02ATHC-PRP
M347173/627748184392302771200649881 : DC8D37DC2617D10C
PRP: Verified
PRP without proof (small exponent)
2019-04-02alexF-ECM
Factor: 627748184392302771200649881 / (ECM curve 126, B1=250000, B2=25000000, Sigma=1888526014595950)
2018-02-21BloodERazorNF
no factor from 2^64 to 2^65
2016-10-31mikrNF-PM1
B1=60000000, B2=3000000000, E=12
2015-12-18Gordon SpenceNF
no factor from 2^63 to 2^64
2015-12-18Gordon SpenceNF
no factor from 2^62 to 2^63
2015-07-25NRNF
no factor from 2^61 to 2^62
2013-06-11lycornNF
no factor from 2^60 to 2^61
2012-02-11alpertronNF-PM1
B1=10000000, B2=200000000, E=12
2011-08-14JossNF-PM1
B1=1309658
2009-01-26Sturle SundeNF
no factor from 2^59 to 2^60
2008-12-31Sturle SundeNF
no factor from 2^58 to 2^59