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
5049977Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
40399817825.3old
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
Verified2017-09-20kkmrkkblmbrbk2126572244B743451013
Verified2018-04-28Oliver Kruse2126572244B743451377502213
History
DateUserTypeResult
2025-01-25Sid & AndyNF-PM1
B1=6000000, B2=6348337380
2025-01-11Sid & AndyNF
no factor from 2^68 to 2^70
2023-05-11This -Anonymous-NF-PM1
B1=50000, B2=1000000
2018-04-28Oliver KruseC-PRP
M5049977/40399817 : 2126572244B74345
PRP: Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M5049977/40399817 : 2126572244B74345
PRP: Verified
PRP without proof (not generated)