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
4071827Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
2090394545271237.6old
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
Verified2017-11-13Oliver KruseD9AEDDE91BBA58521147231453
Verified2017-12-21kkmrkkblmbrbkD9AEDDE91BBA5852119385953
History
DateUserTypeResult
2022-10-05USAFSSNF-PM1
B1=200000, B2=135233670
2017-12-21kkmrkkblmbrbkC-PRP
M4071827/209039454527 : D9AEDDE91BBA5852
PRP: Verified
PRP without proof (not generated)
2017-11-13Oliver KruseC-PRP
M4071827/209039454527 : D9AEDDE91BBA5852
PRP: Verified
PRP without proof (not generated)