Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
3221591Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
8699028934111611549.6old
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
Verified2017-11-02Oliver KruseADD15D57D48A7E6712680353
Verified2017-12-13kkmrkkblmbrbkADD15D57D48A7E671243114053
History
DateUserTypeResult
2022-09-11JossNF-PM1
B1=1000000, B2=241175550
2022-03-11JossNF-PM1
B1=1000000, B2=134343300
2021-07-06JossNF
no factor from 2^67 to 2^68
2021-01-10JossNF-PM1
B1=322159, B2=3221591, E=6
2021-01-10JossNF-PM1
B1=322159
2021-01-02JossNF-PM1
B1=161079
2017-12-13kkmrkkblmbrbkC-PRP
M3221591/869902893411161 : ADD15D57D48A7E67
PRP: Verified
PRP without proof (not generated)
2017-11-02Oliver KruseC-PRP
M3221591/869902893411161 : ADD15D57D48A7E67
PRP: Verified
PRP without proof (not generated)