Marin Mersenne 2^P-1
Username
Password
Forgot password?
Black
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
12743Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
330278072735095556348172374.8old
79075972231903234317048172582.72008-11-22 12:25:27
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001253 / 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 KruseD65E3F7F37EE2BFD2013
Verified2017-10-02kkmrkkblmbrbkD65E3F7F37EE2BFD2013
Verified2017-12-07ATHD65E3F7F37EE2BFD2721213
Verified2020-04-17Oliver Kruse75E31AA329010C992277653
Verified2023-05-24-Anonymous-75E31AA329010C9921258953
Verified2023-05-24reclux75E31AA329010C992889553
P-1 factors
DateFactorB1B2
2023-05-2433027807273509555634817100000000000120417199046794656
History
DateUserTypeResult
2023-05-24recluxC-PRP
M12743/33027807273509555634817/7907597223190323431704817 : 75E31AA329010C99
PRP: Verified
PRP without proof (small exponent)
2023-05-24-Anonymous-C-PRP
M12743/33027807273509555634817/7907597223190323431704817 : 75E31AA329010C99
PRP: Verified
PRP without proof (small exponent)
2023-05-24-Anonymous-F-PM1
Factor: 33027807273509555634817 / (P-1, B1=100000000000, B2=120417199046794650)
2023-05-14JacobZNF-PM1
B1=8700000000, B2=36024966470342850
2022-02-05JossNF-PM1
B1=1000000, B2=3910366209750
2020-04-17Oliver KruseC-PRP
M12743/33027807273509555634817/7907597223190323431704817 : 75E31AA329010C99
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M12743/33027807273509555634817/7907597223190323431704817 : D65E3F7F37EE2BFD
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M12743/33027807273509555634817/7907597223190323431704817 : D65E3F7F37EE2BFD
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M12743/33027807273509555634817/7907597223190323431704817 : D65E3F7F37EE2BFD
PRP without proof (not generated)
2008-11-22-Anonymous-F-ECM
Factor: 7907597223190323431704817