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
12547Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
3237127721.6old
9158329855790809894868756392789.62008-08-29 02:24:31
3051032597707818214886668548309871686830341134.52023-05-18 17:07:47
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001266 / 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
Verified (Factored)2017-09-21Oliver Kruse9D4C3F3DC4120D992013
Verified (Factored)2017-10-12kkmrkkblmbrbk9D4C3F3DC4120D9921171613
Verified (Factored)2020-04-17Oliver Kruse49F2C7698A6ED7232793053
Verified2023-05-18Denial14049F2C7698A6ED7233807953
History
DateUserTypeResult
2023-05-18Denial140C-PRP
M12547/3237127/915832985579080989486875639/30510325977078182148866685483098716868303 : 49F2C7698A6ED723
PRP: Verified
PRP without proof (small exponent)
2023-05-18Denial140F-ECM
Factor: 30510325977078182148866685483098716868303 / (ECM curve 108, B1=3000000, B2=22972799850, Sigma=4063321269034073)
2023-05-13Anton RepkoNF-PM1
B1=100000000000, B2=120417199046794650
2022-02-05JossNF-PM1
B1=1000000, B2=3910366209750
2020-04-17Oliver KruseC-PRP
M12547/3237127/915832985579080989486875639 : 49F2C7698A6ED723
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M12547/3237127/915832985579080989486875639 : 9D4C3F3DC4120D99
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M12547/3237127/915832985579080989486875639 : 9D4C3F3DC4120D99
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M12547/3237127/915832985579080989486875639 : 9D4C3F3DC4120D99
PRP without proof (not generated)
2008-08-29-Anonymous-F-ECM
Factor: 915832985579080989486875639