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
2605103Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
5210207722.3old
1054180979991236.62008-07-14 20:25:20
202775382089291444.22008-09-07 10:07:04
ECM
DigitsB1Curves
2550000150 / 280
Estimated T-Level: 22.7
TF below 2^70 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-15Oliver Kruse8716D75D2DB877003123987453
Verified2017-12-02kkmrkkblmbrbk8716D75D2DB877003253256753
History
DateUserTypeResult
2019-07-04alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2017-12-02kkmrkkblmbrbkC-PRP
M2605103/5210207/105418097999/20277538208929 : 8716D75D2DB87700
PRP: Verified
PRP without proof (not generated)
2017-10-15Oliver KruseC-PRP
M2605103/5210207/105418097999/20277538208929 : 8716D75D2DB87700
PRP: Verified
PRP without proof (not generated)
2008-09-07Will EdgingtonF
Factor: 20277538208929
2008-07-14George WoltmanF-ECM
Factor: 105418097999