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

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MnStatusDetails
2867797Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
1944280790937531547.5old
304247542149385211754.82014-12-12 11:35:57
ECM
DigitsB1Curves
2550000129 / 280
Estimated T-Level: 22.3
TF below 2^69 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-23Oliver Kruse2EFCB6E54CA54F592238908453
Verified2017-12-07kkmrkkblmbrbk2EFCB6E54CA54F592100850853
History
DateUserTypeResult
2022-11-23USAFSSNF-PM1
B1=255000, B2=196319970
2017-12-07kkmrkkblmbrbkC-PRP
M2867797/194428079093753/30424754214938521 : 2EFCB6E54CA54F59
PRP: Verified
PRP without proof (not generated)
2017-10-23Oliver KruseC-PRP
M2867797/194428079093753/30424754214938521 : 2EFCB6E54CA54F59
PRP: Verified
PRP without proof (not generated)
2014-12-12TJAOIF
Factor: 30424754214938521 / TF: 54-55