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
12350671Factored
FactorBitsDate
4249873278611866368765.2old
ECM
DigitsB1Curves
25500002 / 280
Estimated T-Level: 20.0 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2001-05-06Albrecht Heeffer26721BB98B9FBFEC5336127
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-06-06Tucker KaoAB08E3698B09B7FB1764998913
Verified2021-06-09LaurVAB08E3698B09B7FB11144352113
History
DateUserTypeResult
2022-04-07James HeinrichNF
no factor from 2^66 to 2^67
2022-04-07James HeinrichF
Factor: 42498732786118663687 / TF: 65-66
2022-04-07James HeinrichNF
no factor from 2^64 to 2^65
2022-03-01nordiNF-PM1
B1=400000, B2=266270550
2022-02-12nordiNF-PM1
B1=400000
2021-08-21Tucker KaoNF-PP1
Start=96/17, B1=90000, B2=3420000
2021-06-09LaurVC-PRP
M12350671/42498732786118663687 : AB08E3698B09B7FB
PRP: Verified
PRP without proof (not generated)
2021-06-06Tucker KaoC-PRP
M12350671/42498732786118663687 : AB08E3698B09B7FB
PRP: Verified
PRP without proof (not generated)
2021-06-06Tucker KaoNF
no factor from 2^67 to 2^68
2021-06-06Tucker KaoNF-PP1
Start=6/5, B1=90000, B2=3420000