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
2894747Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
492106991928.9old
371771894050491445.12008-09-30 14:38:20
125399417615359611753.52014-09-26 11:14:24
ECM
DigitsB1Curves
255000083 / 280
Estimated T-Level: 21.5
TF below 2^66 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-15Yaroslav Berezhko04FD4774E386B9FF3013
Verified2017-11-16Oliver Kruse04FD4774E386B9FF3111378013
History
DateUserTypeResult
2022-12-02USAFSSNF-PM1
B1=320000, B2=243437040
2017-11-16Oliver KruseC-PRP
M2894747/492106991/37177189405049/12539941761535961 : 04FD4774E386B9FF
PRP: Verified
PRP without proof (not generated)
2017-10-15Yaroslav BerezhkoC-PRP
M2894747/492106991/37177189405049/12539941761535961 : 04FD4774E386B9FF
PRP: Verified
PRP without proof (not generated)
2014-09-26TJAOIF
Factor: 12539941761535961 / TF: 53-54
2008-09-30markrF
Factor: 37177189405049