Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

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MnDetails
3861967
Composite, with 6 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 264
Factored
FactorDigitsBitsDate
996387487929.9old
140575598811133.72008-09-07 21:12:43
106454734158311443.32008-09-30 21:30:32
9374293769852871549.72014-05-09 18:29:03
10094492222411831649.82014-05-14 11:42:10
39928358029720614891961.82016-05-31 11:45:51
P-1 factors
DateFactorsB1B2
2022-07-21No new factors discovered38619673891751500
2022-02-13No new factors discovered2300000134904000
2022-02-09No new factors discovered23000002300000
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkB1043996D6E864E46013
Verified
PRP without proof (not generated)
2017-12-22storm5510B1043996D6E864E46199021213
History
DateUserTypeResult
2022-10-05JossNF-PM1B1=4200000, B2=711820200
2022-09-02JossNF-PM1B1=4200000, B2=217278600
2022-07-21JossF-PM1Factor: 3992835802972061489 / B1=3861967, B2=3891751500
2022-06-19LordJuliusNFno factor TF: 64-65
2022-06-19LordJuliusNFno factor TF: 65-66
2022-06-19LordJuliusNFno factor TF: 63-64
2022-06-19LordJuliusNFno factor TF: 62-63
2022-03-21JossNF-PM1B1=2300000, B2=1003510200
2022-02-13JossF-PM1Factor: 1009449222241183 / B1=2300000, B2=134904000
2022-02-09JossF-PM1Factor: 139778941058474107098201342985727170020195962359 / B1=2300000
2020-03-27JossNF-PM1B1=2300000, B2=200000000, E=12
2020-01-28JossNF-PM1B1=2300000, B2=100000000, E=12
2019-06-18Seth_TrNFno factor TF: 66-67
2017-12-22storm5510C-PRPM3861967/996387487/14057559881/10645473415831/937429376985287/1009449222241183/3992835802972061489 : B1043996D6E864E4
2017-09-20kkmrkkblmbrbkC-PRPM3861967/1009449222241183/10645473415831/14057559881/3992835802972061489/937429376985287/996387487 : B1043996D6E864E4
2016-05-31TJAOIFFactor: 3992835802972061489
2014-05-14TJAOIFFactor: 1009449222241183
2014-05-09TJAOIFFactor: 937429376985287
2008-09-30markrFFactor: 10645473415831
2008-09-07Will EdgingtonFFactor: 14057559881