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

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MnStatusDetails
4772953Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
192063628731134.2old
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
Verified2017-09-20kkmrkkblmbrbkE4F91EE170A7F9D21013
Verified2018-03-19krackerE4F91EE170A7F9D2184729213
History
DateUserTypeResult
2023-10-12USAFSSNF-PM1
B1=240000, B2=91991760
2018-03-19krackerC-PRP
M4772953/19206362873 : E4F91EE170A7F9D2
PRP: Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M4772953/19206362873 : E4F91EE170A7F9D2
PRP: Verified
PRP without proof (not generated)