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
3078391Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
42666499271032.0old
ECM
DigitsB1Curves
255000053 / 280
Estimated T-Level: 20.9
TF below 2^65 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-29Oliver Kruse58DADB9B39ED1EC61300201253
Verified2017-12-11kkmrkkblmbrbk58DADB9B39ED1EC61281924853
History
DateUserTypeResult
2022-02-20JossNF-PM1
B1=1000000, B2=128282700
2021-04-26JossNF
no factor from 2^67 to 2^68
2020-11-21JossNF-PM1
B1=307839, B2=3078391, E=6
2017-12-11kkmrkkblmbrbkC-PRP
M3078391/4266649927 : 58DADB9B39ED1EC6
PRP: Verified
PRP without proof (not generated)
2017-10-29Oliver KruseC-PRP
M3078391/4266649927 : 58DADB9B39ED1EC6
PRP: Verified
PRP without proof (not generated)