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
2807879Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
16537508788731340.6old
ECM
DigitsB1Curves
255000058 / 280
Estimated T-Level: 21.0
TF below 2^65 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-21Oliver KruseD2045B84F958DDD9166583753
Verified2017-12-07nokno3261EE0B7121385D1013
Verified2017-12-07kkmrkkblmbrbkD2045B84F958DDD91199000053
Verified2017-12-08kkmrkkblmbrbk3261EE0B7121385D1151758213
History
DateUserTypeResult
2022-08-20USAFSSNF-PM1
B1=288000, B2=226423890
2017-12-08kkmrkkblmbrbkC-PRP
M2807879/1653750878873 : 3261EE0B7121385D
PRP: Verified
PRP without proof (not generated)
2017-12-07kkmrkkblmbrbkC-PRP
M2807879/1653750878873 : D2045B84F958DDD9
PRP: Verified
PRP without proof (not generated)
2017-12-07noknoC-PRP
M2807879/1653750878873 : 3261EE0B7121385D
PRP: Verified
PRP without proof (not generated)
2017-10-21Oliver KruseC-PRP
M2807879/1653750878873 : D2045B84F958DDD9
PRP: Verified
PRP without proof (not generated)