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

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MnStatusDetails
4514173Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
27085039824.7old
2825420880711238.02008-09-07 23:41:44
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-20kkmrkkblmbrbk6792A148DF5C86972013
Verified2018-02-19Oliver Kruse6792A148DF5C86972442572113
History
DateUserTypeResult
2023-02-10LordJuliusNF
no factor from 2^68 to 2^69
2023-02-10LordJuliusNF
no factor from 2^67 to 2^68
2022-10-07USAFSSNF-PM1
B1=240000, B2=158253810
2018-02-19Oliver KruseC-PRP
M4514173/27085039/282542088071 : 6792A148DF5C8697
PRP: Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M4514173/27085039/282542088071 : 6792A148DF5C8697
PRP: Verified
PRP without proof (not generated)
2008-09-07Will EdgingtonF
Factor: 282542088071