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

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MnStatusDetails
3076387Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
30763871824.9old
15812629191030.62008-09-07 19:43:55
ECM
DigitsB1Curves
255000090 / 280
Estimated T-Level: 21.6
TF below 2^67 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-29Oliver KruseAC8F7F0590E7443A2121752453
Verified2017-12-11kkmrkkblmbrbkAC8F7F0590E7443A2204785253
History
DateUserTypeResult
2022-08-17JossNF-PM1
B1=3076387, B2=331695000
2021-12-20JossNF-PM1
B1=3076387, B2=116689650
2021-06-22JossNF-PM1
B1=3076387
2021-06-19JossNF
no factor from 2^67 to 2^68
2021-02-15JossNF-PM1
B1=307638, B2=6152774, E=6
2020-11-20JossNF-PM1
B1=307638, B2=3076387, E=6
2017-12-11kkmrkkblmbrbkC-PRP
M3076387/30763871/1581262919 : AC8F7F0590E7443A
PRP: Verified
PRP without proof (not generated)
2017-10-29Oliver KruseC-PRP
M3076387/30763871/1581262919 : AC8F7F0590E7443A
PRP: Verified
PRP without proof (not generated)
2008-09-07Will EdgingtonF
Factor: 1581262919