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

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MnStatusDetails
7307683Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
6153743037979743065272169.12012-11-20 08:19:27
ECM
DigitsB1Curves
25500003 / 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)1999-09-22don trimble1FB8B9DE358F4ACD6758354
Verified (Factored)2002-02-17h.h.harmsen1FB8B9DE358F4ACD7185818
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2018-02-26Chang Chia-TcheC9458B92DF5800061244043353
Verified2019-05-03arnaudC9458B92DF5800061151824253
History
DateUserTypeResult
2019-05-03arnaudC-PRP
M7307683/615374303797974306527 : C9458B92DF580006
PRP: Verified
PRP without proof (not generated)
2018-02-26Chang Chia-TcheC-PRP
M7307683/615374303797974306527 : C9458B92DF580006
PRP: Verified
PRP without proof (not generated)
2012-11-20Torchwood InstituteF-ECM
Factor: 615374303797974306527
2011-04-11James HeinrichNF-PM1
B1=140000, B2=3010000, E=6