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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Exponent Range:










MnStatusDetails
7765267Factored
FactorDigitsBitsDate
177075785445205192776412373.92018-07-11 08:32:48
ECM
DigitsB1Curves
25500004 / 280
Estimated T-Level: 20.1 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2000-02-23C. Cooper / S. BooneBBC3768C2F0881064340139
Verified (Factored)2002-05-11chris clarkBBC3768C2F0881066465772
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2018-07-16_p95holder_FE71B9FFC2A956A11554353
Verified2019-09-24Igvan28FE71B9FFC2A956A11659721753
History
DateUserTypeResult
2019-09-24Igvan28C-PRP
M7765267/17707578544520519277641 : FE71B9FFC2A956A1
PRP: Verified
PRP without proof (not generated)
2018-07-16_p95holder_C-PRP
M7765267/17707578544520519277641 : FE71B9FFC2A956A1
PRP: Verified
PRP without proof (not generated)
2018-07-11Claude PortenierF-ECM
Factor: 17707578544520519277641 / (ECM curve 1, B1=50000, B2=5000000)
2016-09-09Gordon SpenceNF
no factor from 2^66 to 2^67
2015-06-03VictordeHollanderNF
no factor from 2^65 to 2^66
2013-12-12David CampeauNF
no factor from 2^64 to 2^65
2013-10-08NesowaNF
no factor from 2^63 to 2^64
2012-08-24NesowaNF-PM1
B1=95000, B2=1781250, E=6