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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MnStatusDetails
2951503Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
4993765985831238.9old
395856800504318171755.12015-01-08 13:24:35
ECM
DigitsB1Curves
2550000106 / 280
Estimated T-Level: 21.9
TF below 2^68 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-25Oliver Kruse4B26E93CAD9743F322503853
Verified2017-12-09kkmrkkblmbrbk4B26E93CAD9743F32192732253
History
DateUserTypeResult
2023-02-12USAFSSNF-PM1
B1=360000, B2=298405800
2017-12-09kkmrkkblmbrbkC-PRP
M2951503/499376598583/39585680050431817 : 4B26E93CAD9743F3
PRP: Verified
PRP without proof (not generated)
2017-10-25Oliver KruseC-PRP
M2951503/499376598583/39585680050431817 : 4B26E93CAD9743F3
PRP: Verified
PRP without proof (not generated)
2015-01-08TJAOIF
Factor: 39585680050431817 / TF: 55-56