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
3934639Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
1236814423271236.8old
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
Verified2017-09-20kkmrkkblmbrbk55011452683A63DD1013
Verified2017-12-30Oliver Kruse55011452683A63DD1329760313
History
DateUserTypeResult
2022-05-31JossNF-PM1
B1=100000, B2=119860650
2022-03-22JossNF-PM1
B1=100000
2022-03-02JossNF-PM1
B1=90000
2017-12-30Oliver KruseC-PRP
M3934639/123681442327 : 55011452683A63DD
PRP: Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M3934639/123681442327 : 55011452683A63DD
PRP: Verified
PRP without proof (not generated)