is 2 2466481 - 1
has 742485 decimal digits
takes 0.171 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L3786FA37524101F6double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26824.166067.6471 %60000001800000001.55699.0161 %25.722870.5640 %
Target2630.647165.0794 %100008000000.00531.3352 %0.652465.5456 %
Difference+5+23.5189+2.5677 %+5990000+179200000+1.5515+7.6809%+25.0704+5.0184 %

Known prime factors (1 factor, 78.3 bits, 0.00317549% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
24664813780250804662217466855532478.32376632473646912696
23 × 3 × 23 × 53 × 2619376320991
2020-08-2653261937632099143,70814,35326,807

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-10-14ANONYMOUSv4_computers2048204800--0.0010.659%
2003-10-31Team Prime Ribv4_computers15000232500--0.0031.693%
2010-11-19JossManual testing2000020000--0.0020.620%
2010-11-25JossManual testing246648246648--0.0252.488%
2013-10-22David Campeaui5-2500k5900001593000012--0.1437.844%
2019-04-19Sid & AndyBullseye600000018000000012--1.55712.949%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-05-02ANONYMOUSv4_computers212590.016
2016-02-23Mark RoseManual testing2592600.031
2009-02-13Sturle Sundefigaro.ifi2602610.062
2012-06-08Sebastian HornbostelManual testing2612620.125
2013-01-23dbaughManual testing2622630.398
2015-03-03VictordeHollanderManual testing2632652.311
2015-10-27ramgeisManual testing2652663.030
2017-07-16Gordon SpenceManual testing2662676.059
2019-06-17TJAOIManual testing26726812.12


ECM factoring results:
Total ECM effort:6.635 GHz-days
Estimated T-Level:21.317
DigitsB1CompleteFacMiss
20110002.8465.807%
25500000.26376.848%
302500000.01798.353%


ECM Summary

B1B2factorcurvesGHz-days
500005000000696.176
50000500000050.459


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-23ANONYMOUSv4_computers3786FA37524101F60.171
2018-05-28kkmrkkblmbrbkold3786FA37524101F60.171


PRP results:
dateuseridcompidcofactorsres64
2020-08-26jvang3600
378025080466221746685553
2D38A6AFF3CDDDEE


CERT results:
dateuseridcompid
2020-08-26Ben Deloi-012e8f9e38365357c


P-1 factor-bounds graph:
B1 = 6000000, B2 = 180000000 (P-1 stage 2)
B1 = 6000000 (P-1 stage 1)
B1 = 590000, B2 = 15930000 (P-1 stage 2)
B1 = 590000 (P-1 stage 1)
B1 = 246648 (P-1 stage 1)
B1 = 15000, B2 = 232500 (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)
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TF factor-bounds graph:
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267
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this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=21.32 ~= 54-bit
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Last modified: 2024-03-13T02:15:48+00:00