Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
127031Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
12194977823.5old
987673646871136.52008-07-26 12:48:48
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000214 / 1566
Estimated T-Level: 30.7
TF below 2^97 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-22Oliver Kruse2753029EB5B42DBA2013
Verified2017-10-13kkmrkkblmbrbk2753029EB5B42DBA26481913
Verified2020-04-17Oliver KruseDA849F071000D0D826782853
Verified2024-02-03Wentao HuangDA849F071000D0D827977353
History
DateUserTypeResult
2024-02-03Naegi MakotoCERT
PRP Certification
Proof certified good
2024-02-03Wentao HuangC-PRP
M127031/12194977/98767364687 : DA849F071000D0D8
PRP proof power = 5
PRP: Verified
Proof certified good
2020-04-17Oliver KruseC-PRP
M127031/12194977/98767364687 : DA849F071000D0D8
PRP: Verified
PRP without proof (small exponent)
2017-10-13kkmrkkblmbrbkC-PRP
M127031/12194977/98767364687 : 2753029EB5B42DBA
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M127031/12194977/98767364687 : 2753029EB5B42DBA
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M127031/12194977/98767364687 : 2753029EB5B42DBA
PRP without proof (not generated)
2017-03-26kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12
2008-07-26J FeitsmaF
Factor: 98767364687