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

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MnStatusDetails
3448649Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
176570828811134.0old
18964189823991340.82008-09-30 14:47:56
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
Verified2017-11-06Oliver Kruse3840BB98F0BAA01D2148546653
Verified2017-12-16kkmrkkblmbrbk3840BB98F0BAA01D2281576053
History
DateUserTypeResult
2022-02-08JossNF-PM1
B1=1000000, B2=1217743800
2021-02-26JossNF
no factor from 2^67 to 2^68
2021-02-18JossNF
no factor from 2^66 to 2^67
2021-02-18JossNF
no factor from 2^65 to 2^66
2017-12-16kkmrkkblmbrbkC-PRP
M3448649/17657082881/1896418982399 : 3840BB98F0BAA01D
PRP: Verified
PRP without proof (not generated)
2017-11-06Oliver KruseC-PRP
M3448649/17657082881/1896418982399 : 3840BB98F0BAA01D
PRP: Verified
PRP without proof (not generated)
2008-09-30markrF
Factor: 1896418982399