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
2554333Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
1090906817944155771856.6old
ECM
DigitsB1Curves
2550000152 / 280
Estimated T-Level: 22.7
TF below 2^70 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Johan Småros178416B5EFAEB39B0
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-16kkmrkkblmbrbk9C8CCC8D571D184D1142960153
Verified2017-11-10Oliver Kruse9C8CCC8D571D184D1229543553
History
DateUserTypeResult
2019-07-04alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2017-11-10Oliver KruseC-PRP
M2554333/109090681794415577 : 9C8CCC8D571D184D
PRP: Verified
PRP without proof (not generated)
2017-10-16kkmrkkblmbrbkC-PRP
M2554333/109090681794415577 : 9C8CCC8D571D184D
PRP: Verified
PRP without proof (not generated)