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
2580587Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
268381049928.0old
ECM
DigitsB1Curves
2550000163 / 280
Estimated T-Level: 22.9
TF below 2^71 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-16kkmrkkblmbrbk598E133401EB320A194207453
Verified2017-11-11Oliver Kruse598E133401EB320A184445953
History
DateUserTypeResult
2019-07-04alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2017-11-11Oliver KruseC-PRP
M2580587/268381049 : 598E133401EB320A
PRP: Verified
PRP without proof (not generated)
2017-10-16kkmrkkblmbrbkC-PRP
M2580587/268381049 : 598E133401EB320A
PRP: Verified
PRP without proof (not generated)