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
3286939Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
868491657383846331756.3old
ECM
DigitsB1Curves
25500009 / 280
Estimated T-Level: 20.2
TF below 2^62 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-11-03Oliver KruseC7259BA5F8644A291236044453
Verified2017-12-14kkmrkkblmbrbkC7259BA5F8644A291119348753
History
DateUserTypeResult
2022-09-10JossNF-PM1
B1=1000000, B2=241175550
2022-03-13JossNF-PM1
B1=1000000, B2=134343300
2021-05-21JossNF
no factor from 2^67 to 2^68
2021-01-02JossNF-PM1
B1=328693, B2=3286939, E=6
2020-12-25JossNF-PM1
B1=109564
2017-12-14kkmrkkblmbrbkC-PRP
M3286939/86849165738384633 : C7259BA5F8644A29
PRP: Verified
PRP without proof (not generated)
2017-11-03Oliver KruseC-PRP
M3286939/86849165738384633 : C7259BA5F8644A29
PRP: Verified
PRP without proof (not generated)