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
2808733Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
870707231929.7old
20099660019779300331960.82016-03-07 12:37:10
ECM
DigitsB1Curves
255000080 / 280
Estimated T-Level: 21.4
TF below 2^66 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-21Oliver Kruse5BA459FA89751A28267862053
Verified2017-12-06kkmrkkblmbrbk5BA459FA89751A28261670553
History
DateUserTypeResult
2021-09-15Dylan DelgadoNF-PM1
B1=1000000, B2=71000000
2017-12-06kkmrkkblmbrbkC-PRP
M2808733/870707231/2009966001977930033 : 5BA459FA89751A28
PRP: Verified
PRP without proof (not generated)
2017-10-21Oliver KruseC-PRP
M2808733/870707231/2009966001977930033 : 5BA459FA89751A28
PRP: Verified
PRP without proof (not generated)
2016-03-07TJAOIF
Factor: 2009966001977930033 / TF: 60-61