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
3254291Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
188488534731134.1old
3814549738571238.52008-09-07 19:47:50
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
Verified2017-11-02kkmrkkblmbrbk22CCB85458E2336B272252753
Verified2017-11-19Oliver Kruse22CCB85458E2336B226200953
History
DateUserTypeResult
2022-09-11JossNF-PM1
B1=1000000, B2=241175550
2022-03-10JossNF-PM1
B1=1000000, B2=134343300
2021-10-03JossNF
no factor from 2^67 to 2^68
2021-01-15JossNF-PM1
B1=325429, B2=3254291, E=6
2021-01-09JossNF-PM1
B1=325429
2020-12-25JossNF-PM1
B1=108476
2017-11-19Oliver KruseC-PRP
M3254291/18848853473/381454973857 : 22CCB85458E2336B
PRP: Verified
PRP without proof (not generated)
2017-11-02kkmrkkblmbrbkC-PRP
M3254291/18848853473/381454973857 : 22CCB85458E2336B
PRP: Verified
PRP without proof (not generated)
2008-09-07Will EdgingtonF
Factor: 381454973857