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
2526233Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
318305359928.2old
129153308452391443.62008-09-30 14:37:10
ECM
DigitsB1Curves
255000070 / 280
Estimated T-Level: 21.3
TF below 2^66 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-15kkmrkkblmbrbkCCDDDF9559082EBC264604553
Verified2017-11-08Oliver KruseCCDDDF9559082EBC2130487153
History
DateUserTypeResult
2022-08-22USAFSSNF-PM1
B1=300000, B2=259451010
2017-11-08Oliver KruseC-PRP
M2526233/318305359/12915330845239 : CCDDDF9559082EBC
PRP: Verified
PRP without proof (not generated)
2017-10-15kkmrkkblmbrbkC-PRP
M2526233/318305359/12915330845239 : CCDDDF9559082EBC
PRP: Verified
PRP without proof (not generated)
2008-09-30markrF
Factor: 12915330845239