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
4143851Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
34093616979531341.6old
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-11-14kkmrkkblmbrbk6FA94583CAB51D0B1235185053
Verified2018-01-14Oliver Kruse6FA94583CAB51D0B1131556553
History
DateUserTypeResult
2022-11-04USAFSSNF-PM1
B1=200000, B2=135233670
2018-01-14Oliver KruseC-PRP
M4143851/3409361697953 : 6FA94583CAB51D0B
PRP: Verified
PRP without proof (not generated)
2017-11-14kkmrkkblmbrbkC-PRP
M4143851/3409361697953 : 6FA94583CAB51D0B
PRP: Verified
PRP without proof (not generated)