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

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MnStatusDetails
344653Factored
FactorDigitsBitsDate
83978099630038103621598535272892.82019-03-24 05:42:16
ECM
DigitsB1Curves
2550000280 / 280
30250000377 / 640
Estimated T-Level: 27.9 ⓘ
TF below 2^88 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski1C7A0
Verified (Factored)Unknown5C7A0
Verified (Factored)Guillermo Ballester Valor282D59C6AA72DC7A0
Verified (Factored)Eivind Triel282D59C6AA72DC7A84599
Verified (Factored)2002-01-22Dennis Pope282D59C6AA72DC7A308511
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2019-03-24ATH8760F23663D6A1F0126656553
Verified2019-03-25arnaud8760F23663D6A1F0125574053
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2019-03-25arnaudC-PRP
M344653/8397809963003810362159853527 : 8760F23663D6A1F0
PRP: Verified
PRP without proof (small exponent)
2019-03-24ATHC-PRP
M344653/8397809963003810362159853527 : 8760F23663D6A1F0
PRP: Verified
PRP without proof (small exponent)
2019-03-24alexF-ECM
Factor: 8397809963003810362159853527 / (ECM curve 201, B1=250000, B2=25000000, Sigma=4166363539480056)
2018-02-21BloodERazorNF
no factor from 2^64 to 2^65
2016-10-15mikrNF-PM1
B1=60000000, B2=3000000000, E=12
2015-12-17Gordon SpenceNF
no factor from 2^63 to 2^64
2015-12-17Gordon SpenceNF
no factor from 2^62 to 2^63
2015-07-25NRNF
no factor from 2^61 to 2^62
2013-06-16Sid & AndyNF
no factor from 2^60 to 2^61
2012-02-07alpertronNF-PM1
B1=10000000, B2=200000000, E=12
2011-08-14JossNF-PM1
B1=1322088
2009-01-25Sturle SundeNF
no factor from 2^59 to 2^60
2008-12-30Sturle SundeNF
no factor from 2^58 to 2^59