Marin Mersenne 2^P-1
Username
Password
Forgot password?
White
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
12343Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
7268430556391239.4old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001251 / 9201
Estimated T-Level: 40.7
TF below 2^130 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver KruseC59F6B20C96480AC1013
Verified2017-10-12kkmrkkblmbrbkC59F6B20C96480AC1825313
Verified2020-04-17Oliver KruseA2F519F9FEA8ECCA1320153
Verified2024-07-01kkmrkkblmbrbkA2F519F9FEA8ECCA1100853
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M12343/726843055639 : A2F519F9FEA8ECCA
PRP: Verified
PRP without proof (small exponent)
2023-04-06-Anonymous-NF-PM1
B1=100000000000, B2=120417199046794650
2020-04-17Oliver KruseC-PRP
M12343/726843055639 : A2F519F9FEA8ECCA
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M12343/726843055639 : C59F6B20C96480AC
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M12343/726843055639 : C59F6B20C96480AC
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M12343/726843055639 : C59F6B20C96480AC
PRP without proof (not generated)
2016-09-09kkmrkkblmbrbkNF-PM1
B1=100000000, B2=10000000000, E=12