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

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MnStatusDetails
2662459Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
47924263825.5old
2768531366571238.02008-09-30 14:37:27
ECM
DigitsB1Curves
255000093 / 280
Estimated T-Level: 21.7
TF below 2^67 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-18Oliver Kruse2B723F731C8DFA25259634053
Verified2017-12-03kkmrkkblmbrbk2B723F731C8DFA252232586753
History
DateUserTypeResult
2019-07-04alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2017-12-03kkmrkkblmbrbkC-PRP
M2662459/47924263/276853136657 : 2B723F731C8DFA25
PRP: Verified
PRP without proof (not generated)
2017-10-18Oliver KruseC-PRP
M2662459/47924263/276853136657 : 2B723F731C8DFA25
PRP: Verified
PRP without proof (not generated)
2008-09-30markrF
Factor: 276853136657