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
2047729Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
3983692951191238.5old
40993363987271341.92008-07-15 07:49:43
ECM
DigitsB1Curves
2550000280 / 280
30250000154 / 640
Estimated T-Level: 26.2
TF below 2^82 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-06Oliver Kruse88A2FD03DA94AFB02013
Verified2017-11-15kkmrkkblmbrbk88A2FD03DA94AFB0224165813
History
DateUserTypeResult
2017-11-15kkmrkkblmbrbkC-PRP
M2047729/398369295119/4099336398727 : 88A2FD03DA94AFB0
PRP: Verified
PRP without proof (not generated)
2017-10-06Oliver KruseC-PRP
M2047729/398369295119/4099336398727 : 88A2FD03DA94AFB0
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2008-07-15J FeitsmaF
Factor: 4099336398727