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:





MnDetails
12227
Composite, with 2 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
1080297137222891546.6old
23173646824003485831485272580.92008-08-29 02:24:29
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001612 / 9201
Estimated T-Level: 40.9 ⓘ
TF below 2^131 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
No proof (small exponent)
2017-09-21Oliver KruseAAC3335B88CFF9402013
Verified
No proof (small exponent)
2017-10-02kkmrkkblmbrbkAAC3335B88CFF9402013
Verified
No proof (small exponent)
2017-12-07ATHAAC3335B88CFF9402616213
Verified
No proof (small exponent)
2020-04-17Oliver Kruse252E3E077E8B3512260953
Verified
No proof (small exponent)
2024-07-01kkmrkkblmbrbk252E3E077E8B35122323553
History
DateUserTypeResult
2025-03-07masserNF-PP1Start=144/11, B1=430000000, B2=429570000000
2025-02-21masserNF-PP1Start=6/5, B1=430000000, B2=429570000000
2025-01-20masserNF-PP1Start=2/7, B1=430000000, B2=429570000000
2024-07-01kkmrkkblmbrbkC-PRPM12227/108029713722289/2317364682400348583148527 : 252E3E077E8B3512
2023-04-06-anonymous-NF-PM1B1=100000000000, B2=121982729876067060
2022-05-17aperson1F-ECMFactor: 108029713722289
2020-04-17Oliver KruseC-PRPM12227/108029713722289/2317364682400348583148527 : 252E3E077E8B3512
2017-12-07ATHC-PRPM12227/108029713722289/2317364682400348583148527 : AAC3335B88CFF940
2017-10-02kkmrkkblmbrbkC-PRPM12227/108029713722289/2317364682400348583148527 : AAC3335B88CFF940
2017-09-21Oliver KruseC-PRPM12227/108029713722289/2317364682400348583148527 : AAC3335B88CFF940
2016-09-09kkmrkkblmbrbkNF-PM1B1=100000000, B2=10000000000, E=12
2008-08-29-anonymous-F-ECMFactor: 2317364682400348583148527