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
2807899Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
1136637515211236.7old
827941757556756971756.22015-03-17 12:07:52
ECM
DigitsB1Curves
255000078 / 280
Estimated T-Level: 21.4
TF below 2^66 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-21Oliver Kruse387B1B5D938E26BB2134745653
Verified2017-12-06kkmrkkblmbrbk387B1B5D938E26BB2211310053
History
DateUserTypeResult
2021-09-14Dylan DelgadoNF-PM1
B1=1000000, B2=71000000
2017-12-06kkmrkkblmbrbkC-PRP
M2807899/113663751521/82794175755675697 : 387B1B5D938E26BB
PRP: Verified
PRP without proof (not generated)
2017-10-21Oliver KruseC-PRP
M2807899/113663751521/82794175755675697 : 387B1B5D938E26BB
PRP: Verified
PRP without proof (not generated)
2015-03-17TJAOIF
Factor: 82794175755675697 / TF: 56-57