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
2455339Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
503437359702202071755.5old
ECM
DigitsB1Curves
255000090 / 280
Estimated T-Level: 21.6
TF below 2^67 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-13Oliver Kruse5B4607D42B3FB913147124253
Verified2017-11-28kkmrkkblmbrbk5B4607D42B3FB9131157176953
History
DateUserTypeResult
2018-09-28alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2017-11-28kkmrkkblmbrbkC-PRP
M2455339/50343735970220207 : 5B4607D42B3FB913
PRP: Verified
PRP without proof (not generated)
2017-10-13Oliver KruseC-PRP
M2455339/50343735970220207 : 5B4607D42B3FB913
PRP: Verified
PRP without proof (not generated)