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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
12143Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
4748600112383591548.8old
457253580505229931755.32008-08-29 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 Kruse10E10B5E8793BBCF2013
Verified2017-10-12kkmrkkblmbrbk10E10B5E8793BBCF2261113
Verified2017-11-23ANONYMOUSCF651143C6B6B2392170853
Verified2017-12-04kkmrkkblmbrbkCF651143C6B6B2392249353
Verified2023-05-19-Anonymous-CF651143C6B6B2392170453
History
DateUserTypeResult
2023-05-19-Anonymous-C-PRP
M12143/474860011238359/45725358050522993 : CF651143C6B6B239
PRP: Verified
PRP without proof (small exponent)
2023-04-06-Anonymous-NF-PM1
B1=100000000000, B2=120942232635634410
2017-12-04kkmrkkblmbrbkC-PRP
M12143/474860011238359/45725358050522993 : CF651143C6B6B239
PRP: Verified
PRP without proof (small exponent)
2017-11-23ANONYMOUSC-PRP
M12143/474860011238359/45725358050522993 : CF651143C6B6B239
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M12143/474860011238359/45725358050522993 : 10E10B5E8793BBCF
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M12143/474860011238359/45725358050522993 : 10E10B5E8793BBCF
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M12143/474860011238359/45725358050522993 : 10E10B5E8793BBCF
PRP without proof (not generated)
2016-09-08kkmrkkblmbrbkNF-PM1
B1=100000000, B2=10000000000, E=12
2008-08-29-Anonymous-F-ECM
Factor: 45725358050522993