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
4775569Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
687681937929.4old
83994522288231342.92008-09-30 21:36:14
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-20kkmrkkblmbrbkE09D48ABA9279BDC2013
Verified2018-03-20BattlemaxxE09D48ABA9279BDC244810513
History
DateUserTypeResult
2023-10-13USAFSSNF-PM1
B1=240000, B2=91991760
2018-03-20BattlemaxxC-PRP
M4775569/687681937/8399452228823 : E09D48ABA9279BDC
PRP: Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M4775569/687681937/8399452228823 : E09D48ABA9279BDC
PRP: Verified
PRP without proof (not generated)
2008-09-30markrF
Factor: 8399452228823