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
12289Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
14344843832808085671960.3old
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 Kruse72EB7497E8F1F2891013
Verified2017-10-12kkmrkkblmbrbk72EB7497E8F1F289135013
Verified2020-04-17Oliver Kruse65FD28DF56175F5D1435753
Verified2024-07-01kkmrkkblmbrbk65FD28DF56175F5D1958853
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M12289/1434484383280808567 : 65FD28DF56175F5D
PRP: Verified
PRP without proof (small exponent)
2023-04-06-Anonymous-NF-PM1
B1=100000000000, B2=120447384588771240
2020-04-17Oliver KruseC-PRP
M12289/1434484383280808567 : 65FD28DF56175F5D
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M12289/1434484383280808567 : 72EB7497E8F1F289
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M12289/1434484383280808567 : 72EB7497E8F1F289
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M12289/1434484383280808567 : 72EB7497E8F1F289
PRP without proof (not generated)
2016-09-09kkmrkkblmbrbkNF-PM1
B1=100000000, B2=10000000000, E=12