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
2125649Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
751265192674391446.1old
ECM
DigitsB1Curves
2550000280 / 280
30250000157 / 640
Estimated T-Level: 26.2
TF below 2^82 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-07Oliver KruseA49A4A9C42D93E981013
Verified2017-11-17kkmrkkblmbrbkA49A4A9C42D93E98165908413
History
DateUserTypeResult
2017-11-17kkmrkkblmbrbkC-PRP
M2125649/75126519267439 : A49A4A9C42D93E98
PRP: Verified
PRP without proof (not generated)
2017-10-07Oliver KruseC-PRP
M2125649/75126519267439 : A49A4A9C42D93E98
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12