Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
12211Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
42312580331032.0old
139111617682753869654012373.62008-08-29 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 KruseF8BCAFDDAEF4C54F2013
Verified2017-10-12kkmrkkblmbrbkF8BCAFDDAEF4C54F2658413
Verified2020-04-17Oliver Kruse2F0DFA1B74AF3EFE2702553
Verified2024-07-01kkmrkkblmbrbk2F0DFA1B74AF3EFE21048853
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M12211/13911161768275386965401/4231258033 : 2F0DFA1B74AF3EFE
PRP: Verified
PRP without proof (small exponent)
2023-04-06-Anonymous-NF-PM1
B1=100000000000, B2=121982729876067060
2020-04-17Oliver KruseC-PRP
M12211/4231258033/13911161768275386965401 : 2F0DFA1B74AF3EFE
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M12211/4231258033/13911161768275386965401 : F8BCAFDDAEF4C54F
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M12211/4231258033/13911161768275386965401 : F8BCAFDDAEF4C54F
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M12211/4231258033/13911161768275386965401 : F8BCAFDDAEF4C54F
PRP without proof (not generated)
2016-09-09kkmrkkblmbrbkNF-PM1
B1=100000000, B2=10000000000, E=12
2008-08-29-Anonymous-F-ECM
Factor: 13911161768275386965401