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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Exponent Range:





MnDetails
2493187
Composite, with 2 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 263
Factored
FactorDigitsBitsDate
27774103191031.4old
39034781720471341.82008-07-14 20:24:19
ECM
DigitsB1Curves
2550000105 / 280
Estimated T-Level: 21.9 ⓘ
TF below 2^68 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
PRP without proof (not generated)
2017-10-14Oliver KruseB7257E91CD0EF0D42205886853
Verified
PRP without proof (not generated)
2017-11-30noknoDC53F906ED76A0CE2013
Verified
PRP without proof (not generated)
2017-11-30storm5510B7257E91CD0EF0D42143977753
Verified
PRP without proof (not generated)
2017-12-04kkmrkkblmbrbkDC53F906ED76A0CE276655613
History
DateUserTypeResult
2019-07-04alpertronNF-PM1B1=2000000, B2=60000000, E=12
2017-12-04kkmrkkblmbrbkC-PRPM2493187/2777410319/3903478172047 : DC53F906ED76A0CE
2017-11-30storm5510C-PRPM2493187/2777410319/3903478172047 : B7257E91CD0EF0D4
2017-11-30noknoC-PRPM2493187/2777410319/3903478172047 : DC53F906ED76A0CE
2017-10-14Oliver KruseC-PRPM2493187/2777410319/3903478172047 : B7257E91CD0EF0D4
2008-07-14George WoltmanF-ECMFactor: 3903478172047