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
12071Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
237473917409253373296889272684.3old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001342 / 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 Kruse69D079E6006BCD371013
Verified2017-10-12kkmrkkblmbrbk69D079E6006BCD3715613
Verified2020-04-17Oliver KruseCB8D0AE317494B321523953
Verified2023-05-19-Anonymous-CB8D0AE317494B321107153
History
DateUserTypeResult
2023-05-19-Anonymous-C-PRP
M12071/23747391740925337329688927 : CB8D0AE317494B32
PRP: Verified
PRP without proof (small exponent)
2023-04-06-Anonymous-NF-PM1
B1=100000000000, B2=122192573512709700
2020-04-17Oliver KruseC-PRP
M12071/23747391740925337329688927 : CB8D0AE317494B32
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M12071/23747391740925337329688927 : 69D079E6006BCD37
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M12071/23747391740925337329688927 : 69D079E6006BCD37
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M12071/23747391740925337329688927 : 69D079E6006BCD37
PRP without proof (not generated)
2016-09-08kkmrkkblmbrbkNF-PM1
B1=100000000, B2=10000000000, E=12