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

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MnStatusDetails
2476321Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
150510790391133.8old
229166075250171444.42008-09-30 14:37:05
ECM
DigitsB1Curves
2550000158 / 280
Estimated T-Level: 22.8
TF below 2^71 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-14Oliver KruseA8728095703841582239544553
Verified2017-11-29kkmrkkblmbrbkA872809570384158232485753
History
DateUserTypeResult
2018-09-28alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2017-11-29kkmrkkblmbrbkC-PRP
M2476321/15051079039/22916607525017 : A872809570384158
PRP: Verified
PRP without proof (not generated)
2017-10-14Oliver KruseC-PRP
M2476321/15051079039/22916607525017 : A872809570384158
PRP: Verified
PRP without proof (not generated)
2008-09-30markrF
Factor: 22916607525017