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

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Exponent Range:










MnStatusDetails
7211Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
14423513.8old
57689515.8old
475927618.9old
48059061107239139591962.1old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000002383 / 9201
Estimated T-Level: 41.3
TF below 2^132 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse5ECD6E85F35D60914013
Verified2017-10-12kkmrkkblmbrbk5ECD6E85F35D60914111013
Verified2020-04-17Oliver KruseDEA55CFEDBE108A84456053
Verified (Factored)2022-05-12Jorge CoveiroDEA55CFEDBE108A816653
Verified2024-02-03Wentao HuangDEA55CFEDBE108A84119853
History
DateUserTypeResult
2024-02-03Wentao HuangC-PRP
M7211/14423/57689/475927/4805906110723913959 : DEA55CFEDBE108A8
PRP: Verified
PRP without proof (small exponent)
2023-08-26-Anonymous-NF-PM1
B1=34000000000, B2=142096338314180250
2022-05-12Jorge CoveiroC-PRP
M7211/14423 : DEA55CFEDBE108A8
PRP: Verified
PRP without proof (small exponent)
2021-12-08onlinegameNF-PM1
B1=1000000000, B2=10000000000, E=12
2020-04-17Oliver KruseC-PRP
M7211/14423/57689/475927/4805906110723913959 : DEA55CFEDBE108A8
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M7211/14423/57689/475927/4805906110723913959 : 5ECD6E85F35D6091
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M7211/14423/57689/475927/4805906110723913959 : 5ECD6E85F35D6091
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M7211/14423/57689/475927/4805906110723913959 : 5ECD6E85F35D6091
PRP without proof (not generated)