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

PrimeNet Exponent Status

Exponent Range:





MnDetails
12143
Composite, with 2 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
4748600112383591548.8old
457253580505229931755.32008-08-29 02:24:29
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001612 / 9201
Estimated T-Level: 40.9 ⓘ
TF below 2^131 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
No proof (small exponent)
2017-09-21Oliver Kruse10E10B5E8793BBCF2013
Verified
No proof (small exponent)
2017-10-12kkmrkkblmbrbk10E10B5E8793BBCF2261113
Verified
No proof (small exponent)
2017-11-23ANONYMOUSCF651143C6B6B2392170853
Verified
No proof (small exponent)
2017-12-04kkmrkkblmbrbkCF651143C6B6B2392249353
Verified
No proof (small exponent)
2023-05-19-anonymous-CF651143C6B6B2392170453
History
DateUserTypeResult
2025-03-08masserNF-PP1Start=142/43, B1=430000000, B2=429570000000
2025-02-22masserNF-PP1Start=6/5, B1=430000000, B2=429570000000
2025-01-20masserNF-PP1Start=2/7, B1=430000000, B2=429570000000
2023-05-19-anonymous-C-PRPM12143/474860011238359/45725358050522993 : CF651143C6B6B239
2023-04-06-anonymous-NF-PM1B1=100000000000, B2=120942232635634410
2017-12-04kkmrkkblmbrbkC-PRPM12143/474860011238359/45725358050522993 : CF651143C6B6B239
2017-11-23ANONYMOUSC-PRPM12143/474860011238359/45725358050522993 : CF651143C6B6B239
2017-10-12kkmrkkblmbrbkC-PRPM12143/474860011238359/45725358050522993 : 10E10B5E8793BBCF
2017-09-21Oliver KruseC-PRPM12143/474860011238359/45725358050522993 : 10E10B5E8793BBCF
2017-09-21Oliver KruseC-PRPM12143/474860011238359/45725358050522993 : 10E10B5E8793BBCF
2016-09-08kkmrkkblmbrbkNF-PM1B1=100000000, B2=10000000000, E=12
2008-08-29-anonymous-F-ECMFactor: 45725358050522993