Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
2571979Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
26800021191031.3old
79084454538538027911962.82016-10-12 11:23:31
ECM
DigitsB1Curves
2550000106 / 280
Estimated T-Level: 21.9
TF below 2^68 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-15Oliver Kruse964BE71907FB8CA22241691953
Verified2017-12-01kkmrkkblmbrbk964BE71907FB8CA2224862753
History
DateUserTypeResult
2022-09-01USAFSSNF-PM1
B1=300000, B2=258641460
2017-12-01kkmrkkblmbrbkC-PRP
M2571979/2680002119/7908445453853802791 : 964BE71907FB8CA2
PRP: Verified
PRP without proof (not generated)
2017-10-15Oliver KruseC-PRP
M2571979/2680002119/7908445453853802791 : 964BE71907FB8CA2
PRP: Verified
PRP without proof (not generated)
2016-10-12TJAOIF
Factor: 7908445453853802791 / TF: 62-63