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
2804209Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
286029319928.1old
1835747379771237.42008-09-07 19:41:57
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 Kruse94AC3452A45E50DB2129334053
Verified2017-12-06kkmrkkblmbrbk94AC3452A45E50DB280307653
History
DateUserTypeResult
2021-09-10Dylan DelgadoNF-PM1
B1=1000000, B2=71000000
2017-12-06kkmrkkblmbrbkC-PRP
M2804209/286029319/183574737977 : 94AC3452A45E50DB
PRP: Verified
PRP without proof (not generated)
2017-10-21Oliver KruseC-PRP
M2804209/286029319/183574737977 : 94AC3452A45E50DB
PRP: Verified
PRP without proof (not generated)
2008-09-07Will EdgingtonF
Factor: 183574737977