Marin Mersenne 2^P-1
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MnStatusDetails
4027811Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
28793563343919585911961.32009-11-14 02:56:33
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)1998-05-16David Linton82B4C403129511CC0
Verified (Factored)1999-10-21Rhett Hooper82B4C403129511CC2479142
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-20kkmrkkblmbrbkA57776C5C298ACDB1013
Verified2018-01-06Oliver KruseA57776C5C298ACDB140369113
History
DateUserTypeResult
2022-08-16USAFSSNF-PM1
B1=180000, B2=96593640
2018-01-06Oliver KruseC-PRP
M4027811/2879356334391958591 : A57776C5C298ACDB
PRP: Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M4027811/2879356334391958591 : A57776C5C298ACDB
PRP: Verified
PRP without proof (not generated)
2009-11-14GrunwalderGIMPF-ECM
Factor: 2879356334391958591