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
2766887Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
33433568389031341.6old
ECM
DigitsB1Curves
255000097 / 280
Estimated T-Level: 21.7
TF below 2^67 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-20Oliver Kruse6A7F16F38AF92D4A199972553
Verified2017-12-06Chang Chia-Tche6A7F16F38AF92D4A1166952253
History
DateUserTypeResult
2022-11-29USAFSSNF-PM1
B1=320000, B2=261254070
2017-12-06Chang Chia-TcheC-PRP
M2766887/3343356838903 : 6A7F16F38AF92D4A
PRP: Verified
PRP without proof (not generated)
2017-10-20Oliver KruseC-PRP
M2766887/3343356838903 : 6A7F16F38AF92D4A
PRP: Verified
PRP without proof (not generated)