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

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MnStatusDetails
2052049Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
216162841671134.3old
257080698731134.62008-07-15 07:49:46
ECM
DigitsB1Curves
2550000280 / 280
30250000161 / 640
Estimated T-Level: 26.3
TF below 2^82 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-06Oliver Kruse0D3645747B8ED6EA2013
Verified2017-11-15kkmrkkblmbrbk0D3645747B8ED6EA299068013
History
DateUserTypeResult
2017-11-15kkmrkkblmbrbkC-PRP
M2052049/21616284167/25708069873 : 0D3645747B8ED6EA
PRP: Verified
PRP without proof (not generated)
2017-10-06Oliver KruseC-PRP
M2052049/21616284167/25708069873 : 0D3645747B8ED6EA
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2008-07-15J FeitsmaF
Factor: 25708069873