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

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MnStatusDetails
12671609Factored
FactorDigitsBitsDate
17166190453562549832912892580.52016-04-15 07:40:34
ECM
DigitsB1Curves
25500001 / 280
Estimated T-Level: 20.0 ⓘ
TF below 2^61 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2001-08-31Smegheads4775EB722BF9AB466967263
Verified (Factored)2004-09-02Phillip Reed4775EB722BF9AB463161655
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-04-30PoaoB5F0DEEBB9587F2A11018497953
History
DateUserTypeResult
2023-10-26nordiNF-PM1
B1=500000, B2=430944150
2023-10-12nordiNF-PM1
B1=500000
2022-04-30curtiscCERT
PRP Certification
Proof certified good
2022-04-30PoaoC-PRP
M12671609/1716619045356254983291289 : B5F0DEEBB9587F2A
PRP proof power = 8
PRP: Verified
Proof certified good
2016-04-15Massimo Cappelli (ik5pwa)F-ECM
Factor: 1716619045356254983291289 / (ECM curve 1, B1=50000, B2=5000000)
2015-03-31ThaNF
no factor from 2^66 to 2^67
2014-04-07NesowaNF
no factor from 2^65 to 2^66
2013-06-12lycornNF
no factor from 2^64 to 2^65