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
12227Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
1080297137222891546.6old
23173646824003485831485272580.92008-08-29 02:24:29
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001282 / 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 KruseAAC3335B88CFF9402013
Verified2017-10-02kkmrkkblmbrbkAAC3335B88CFF9402013
Verified2017-12-07ATHAAC3335B88CFF9402616213
Verified2020-04-17Oliver Kruse252E3E077E8B3512260953
Verified2024-07-01kkmrkkblmbrbk252E3E077E8B35122323553
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M12227/108029713722289/2317364682400348583148527 : 252E3E077E8B3512
PRP: Verified
PRP without proof (small exponent)
2023-04-06-Anonymous-NF-PM1
B1=100000000000, B2=121982729876067060
2022-05-17aperson1F-ECM
Factor: 108029713722289 / (ECM curve 1, B1=10000000, B2=1020000000)
2020-04-17Oliver KruseC-PRP
M12227/108029713722289/2317364682400348583148527 : 252E3E077E8B3512
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M12227/108029713722289/2317364682400348583148527 : AAC3335B88CFF940
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M12227/108029713722289/2317364682400348583148527 : AAC3335B88CFF940
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M12227/108029713722289/2317364682400348583148527 : AAC3335B88CFF940
PRP without proof (not generated)
2016-09-09kkmrkkblmbrbkNF-PM1
B1=100000000, B2=10000000000, E=12
2008-08-29-Anonymous-F-ECM
Factor: 2317364682400348583148527