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
2748829Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
82464871826.3old
20820510471291340.92008-09-30 14:37:48
ECM
DigitsB1Curves
255000092 / 280
Estimated T-Level: 21.6
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 Kruse551E74E3F55544CA223467953
Verified2017-12-05kkmrkkblmbrbk551E74E3F55544CA2239391753
History
DateUserTypeResult
2022-11-23USAFSSNF-PM1
B1=255000, B2=191586780
2017-12-05kkmrkkblmbrbkC-PRP
M2748829/82464871/2082051047129 : 551E74E3F55544CA
PRP: Verified
PRP without proof (not generated)
2017-10-20Oliver KruseC-PRP
M2748829/82464871/2082051047129 : 551E74E3F55544CA
PRP: Verified
PRP without proof (not generated)
2008-09-30markrF
Factor: 2082051047129