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

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MnStatusDetails
2706313Factored
FactorDigitsBitsDate
28761394315159087839586092581.32020-08-14 07:14:28
ECM
DigitsB1Curves
255000040 / 280
Estimated T-Level: 20.7 ⓘ
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Dan Woerner5ECD7750730C5EEC0
Verified (Factored)1999-08-07Dave Barton5ECD7750730C5EEC2127982
Verified (Factored)2018-08-01kkmrkkblmbrbk5ECD7750730C5EEC1145460
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-08-15M Miller05085B97A4EE30C21212213553
History
DateUserTypeResult
2023-04-17Kevin_9611NF-PM1
B1=720000, B2=868549500
2020-08-15rucioCERT
PRP Certification
Proof certified good
2020-08-15M MillerC-PRP
M2706313/2876139431515908783958609 : 05085B97A4EE30C2
PRP proof power = 7
PRP: Verified
Proof certified good
2020-08-14Sergey NosovF-ECM
Factor: 2876139431515908783958609 / (ECM curve 1, B1=50000, B2=5000000)
2019-02-11chuenkitNF
no factor from 2^67 to 2^68
2018-08-06JossNF-PM1
B1=600000, B2=6000000, E=6
2018-08-01kkmrkkblmbrbkC-LL
5ECD7750730C5EEC
2017-09-29Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-01-29ramgeisNF
no factor from 2^65 to 2^66
2015-04-13VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-13VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-10dbaughNF
no factor from 2^62 to 2^63
2012-04-27Grant McCrackenNF
no factor from 2^61 to 2^62
2011-03-27James HeinrichNF-PM1
B1=300000, B2=8000000, E=12
2011-01-18JossNF-PM1
B1=50000
2010-12-26JossNF-PM1
B1=30000
2010-12-16JossNF-PM1
B1=20000
2009-01-31Sturle SundeNF
no factor from 2^60 to 2^61