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
2981089Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
582564412391135.8old
ECM
DigitsB1Curves
255000055 / 280
Estimated T-Level: 21.0
TF below 2^65 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-26Oliver Kruse0849FA1C35418FA81255795653
Verified2017-12-10kkmrkkblmbrbk0849FA1C35418FA81109914653
History
DateUserTypeResult
2022-11-16Kevin_9611NF-PM1
B1=1000000, B2=203977620
2017-12-10kkmrkkblmbrbkC-PRP
M2981089/58256441239 : 0849FA1C35418FA8
PRP: Verified
PRP without proof (not generated)
2017-10-26Oliver KruseC-PRP
M2981089/58256441239 : 0849FA1C35418FA8
PRP: Verified
PRP without proof (not generated)