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

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MnStatusDetails
2336783Factored
FactorDigitsBitsDate
20848782540397345841532270.82020-06-28 07:31:25
ECM
DigitsB1Curves
255000066 / 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)Bob ShairB26C1D6B065BB2320
Verified (Factored)Mark CrosbyB26C1D6B065BB2320
Verified (Factored)1999-03-15Allister WeiB26C1D6B065BB2321821842
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-06-28M Miller43EC9AFD7E4AB0A3171519253
Verified2020-06-29oodaira43EC9AFD7E4AB0A313670453
History
DateUserTypeResult
2020-06-29oodairaC-PRP
M2336783/2084878254039734584153 : 43EC9AFD7E4AB0A3
PRP: Verified
PRP without proof (not generated)
2020-06-28M MillerC-PRP
M2336783/2084878254039734584153 : 43EC9AFD7E4AB0A3
PRP: Verified
PRP without proof (not generated)
2020-06-28GANF-ECM
Factor: 2084878254039734584153 / (ECM curve 3, B1=50000, B2=5000000, Sigma=3204813010330147)
2019-03-18TJAOINF
no factor from 2^67 to 2^68
2018-02-21Sid & AndyNF-PM1
B1=6000000, B2=180000000, E=12
2017-06-07Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2015-10-25ramgeisNF
no factor from 2^65 to 2^66
2015-03-03VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-03VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-05-27Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-03-03BudNF-PM1
B1=500000, B2=10000000, E=12
2009-01-10Sturle SundeNF
no factor from 2^60 to 2^61