is 2 2595979 - 1
has 781468 decimal digits
takes 0.180 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L6474FE065A093D11double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26711.446167.1642%30000001350000001.02508.9639%12.471270.1076%2.9434%
PrimeNet2590.029662.7119%110002000000.00212.6941%0.031763.7164%1.0046%
GPU722630.614865.0794%120002000000.00221.5299%0.617065.6136%0.5342%
Difference+4+10.8313+2.0848%+2988000+134800000+1.0228+7.4341%+11.8541+4.4940%+4.4940%

Known prime factors (1 factor, 85.3 bits, 0.00328551% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2595979473351503913684024811953992685.2919117013348599584681
112 × 29 × 7643 × 8761 × 38801783
2018-11-278761388017835,397,2090.21340.3971

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-31T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.294%
2003-11-08T00:00:00Team Prime Ribv4_computers15000206250---0.003--0.898%
2010-11-16T23:08:00Jocelyn LaroucheManual testing2000020000---0.002--0.317%
2011-01-15T02:57:00Jocelyn LaroucheManual testing5000050000---0.005--0.622%
2011-02-25T17:37:00James Heinrichi7-9203000008000000---0.072--4.397%
2018-07-08T11:30:43Jocelyn Larouchelow 4M60000060000006---0.090--4.480%
2018-11-28T00:27:22mikrMSI3000000135000000122685.2911.0250.3602.0508.964%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-02-12T00:00:00ANONYMOUSv4_computers21258--0.015--
1999-03-26T00:00:00ANONYMOUSv4_computers21259--0.030--
2016-02-23T16:29:17Mark RoseManual testing259260--0.030--
2009-01-31T21:19:00Sturle Sundedietrich.ifi260261--0.059--
2012-06-23T09:43:00Sebastian HornbostelManual testing261262--0.118--
2013-01-14T11:55:00dbaughManual testing262263--0.378--
2015-02-27T20:35:00VictordeHollanderManual testing263264--0.756--
2015-02-27T20:35:00VictordeHollanderManual testing264265--1.439--
2015-11-06T09:16:17ramgeisManual testing265266--2.879--
2017-08-21T17:34:51Gordon SpenceManual testing266267--5.757--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.774 GHz-days
Estimated T-Level:1.500
DigitsB1CurvesCompleteFacMiss
201100030 / 1000.30073.970%
255000030 / 2800.10789.823%

New Calculation Method

Total ECM effort:2.774 GHz-days
Estimated T-Level:1.500
DigitsB1CompleteFacMiss
20110000.96837.994%
25500000.08791.625%
302500000.00599.463%


ECM Summary

B1B2factorcurvesGHz-days
500005000000302.774


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-02-12T00:00:00ANONYMOUSv4_computers6474FE065A093D110.180
1999-03-26T00:00:00ANONYMOUSv4_computers6474FE065A093D110.180


PRP results:
dateuseridcompidcofactorsres64PRP
2018-11-28T00:56:36rucio
47335150391368402481195399
52BF9E3D3770C9__no
2018-11-28T01:13:24ATHec2-PRPCFDC
47335150391368402481195399
52BF9E3D3770C9__no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 135000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 600000, B2 = 6000000 (P-1 stage 2)
B1 = 300000, B2 = 8000000 (P-1 stage 2)
B1 = 600000 (P-1 stage 1)
B1 = 300000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
B1 = 15000, B2 = 206250 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
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105
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107
102
103
104
105
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109
TF factor-bounds graph:
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266
265
264
263
262
261
260
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258
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2100
Last modified: 2018-11-28T01:13:24+00:00