Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
2407697Factored
FactorDigitsBitsDate
1677378818083843517864202972787.12014-03-03 20:37:18
ECM
DigitsB1Curves
255000067 / 280
Estimated T-Level: 21.2
TF below 2^65 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)John Lloyd582ECBBBB8959F3F0
Verified (Factored)Stephen Wood582ECBBBB8959F3F0
Verified (Factored)1999-03-15Carl Mikkelsen582ECBBBB8959F3F1193668
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-13Oliver KruseD28B1349B0D3BA371235105053
Verified2017-11-26kkmrkkblmbrbkD28B1349B0D3BA371185750853
P-1 factors
DateFactorB1B2
2014-03-0316773788180838435178642029731028220
History
DateUserTypeResult
2022-03-09LordJuliusNF
no factor from 2^1 to 2^60
2018-09-28alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2017-11-26kkmrkkblmbrbkC-PRP
M2407697/167737881808384351786420297 : D28B1349B0D3BA37
PRP: Verified
PRP without proof (not generated)
2017-10-13Oliver KruseC-PRP
M2407697/167737881808384351786420297 : D28B1349B0D3BA37
PRP: Verified
PRP without proof (not generated)
2014-03-03mikrF-PM1
Factor: 167737881808384351786420297
2013-12-04Jerry HallettNF
no factor from 2^62 to 2^63
2012-06-03Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-12-21markrNF-PM1
B1=95000, B2=1923750, E=6
2010-11-16JossNF-PM1
B1=20000
2010-11-09JossNF-PM1
B1=15000
2009-01-15Sturle SundeNF
no factor from 2^60 to 2^61