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

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MnStatusDetails
2076391Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
56685474311032.4old
35265841644110537931961.62016-05-13 11:25:29
ECM
DigitsB1Curves
2550000280 / 280
30250000166 / 640
Estimated T-Level: 26.3
TF below 2^82 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-06Oliver KruseFB16E34256EFF3652013
Verified2017-11-16kkmrkkblmbrbkFB16E34256EFF365238700513
History
DateUserTypeResult
2017-11-16kkmrkkblmbrbkC-PRP
M2076391/5668547431/3526584164411053793 : FB16E34256EFF365
PRP: Verified
PRP without proof (not generated)
2017-10-06Oliver KruseC-PRP
M2076391/5668547431/3526584164411053793 : FB16E34256EFF365
PRP: Verified
PRP without proof (not generated)
2016-05-13TJAOIF
Factor: 3526584164411053793 / TF: 61-62
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12