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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
12611Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
1235879720.2old
2044627323452765268528364092787.42008-08-29 02:24:31
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001270 / 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 KruseBD9F4BE3830E690B2013
Verified2017-10-12kkmrkkblmbrbkBD9F4BE3830E690B2171413
Verified2020-04-17Oliver Kruse9EB574D7939AC5B72226353
Verified2024-07-01kkmrkkblmbrbk9EB574D7939AC5B721075153
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M12611/1235879/204462732345276526852836409 : 9EB574D7939AC5B7
PRP: Verified
PRP without proof (small exponent)
2023-05-13Anton RepkoNF-PM1
B1=100000000000, B2=120417199046794650
2022-02-05JossNF-PM1
B1=1000000, B2=3910366209750
2020-04-17Oliver KruseC-PRP
M12611/1235879/204462732345276526852836409 : 9EB574D7939AC5B7
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M12611/1235879/204462732345276526852836409 : BD9F4BE3830E690B
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M12611/1235879/204462732345276526852836409 : BD9F4BE3830E690B
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M12611/1235879/204462732345276526852836409 : BD9F4BE3830E690B
PRP without proof (not generated)
2008-08-29-Anonymous-F-ECM
Factor: 204462732345276526852836409