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
3456979Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
974868079929.9old
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
Verified2017-11-06kkmrkkblmbrbkE005FF73B43506F4183420753
Verified2017-11-22Oliver KruseE005FF73B43506F41290719653
History
DateUserTypeResult
2022-01-22JossNF-PM1
B1=1000000, B2=114656850
2021-04-24JossNF
no factor from 2^67 to 2^68
2020-12-02JossNF-PM1
B1=345697, B2=3456979, E=6
2017-11-22Oliver KruseC-PRP
M3456979/974868079 : E005FF73B43506F4
PRP: Verified
PRP without proof (not generated)
2017-11-06kkmrkkblmbrbkC-PRP
M3456979/974868079 : E005FF73B43506F4
PRP: Verified
PRP without proof (not generated)