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
2287547Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
56565730200971342.4old
ECM
DigitsB1Curves
2550000180 / 280
Estimated T-Level: 23.2
TF below 2^72 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-11Oliver KruseD7E65BCF33EB78D81013
Verified2017-11-22kkmrkkblmbrbkD7E65BCF33EB78D8138178813
History
DateUserTypeResult
2017-11-22kkmrkkblmbrbkC-PRP
M2287547/5656573020097 : D7E65BCF33EB78D8
PRP: Verified
PRP without proof (not generated)
2017-10-11Oliver KruseC-PRP
M2287547/5656573020097 : D7E65BCF33EB78D8
PRP: Verified
PRP without proof (not generated)
2016-04-18alpertronNF-PM1
B1=500000, B2=15000000, E=12