is 2 3524371 - 1
has 1060942 decimal digits
takes 0.370 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L324DA68559D593E3double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272271.348769.4444 %10000001452087001.34885.4886 %272.697671.1215 %
Target2641.009965.6250 %2000018000000.01781.9178 %1.027766.2843 %
Difference+8+270.3388+3.8194 %+980000+143408700+1.3310+3.5708%+271.6698+4.8373 %

Known prime factors (1 factor, 72.9 bits, 0.00206751% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
352437186104818872338574105112272.8671221562923885405
33 × 5 × 37 × 244557141919
2021-06-2237244557141919271.352,029.13,789.9

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-07-06Carsten Kossendeymother20000245000--0.0051.721%
2011-11-20USAFSSP4_2600600009900006--0.0173.161%
2014-08-07JossManual testing7821278212--0.0121.341%
2014-11-10JossManual testing9642496424--0.0151.498%
2015-10-20Squeeky_SquirrelP4_260017000045900006--0.0635.174%
2017-04-27JossManual testing34000034000006--0.0775.250%
2021-01-08Dylan DelgadoManual testing16000005000000012--0.6349.683%
2022-03-01JossManual testing100000100000--0.0151.526%
2022-04-30JossManual testing500000145208700--1.33710.145%
2022-09-20JossManual testing1000000145208700--1.41210.834%


Trial Factoring results:
57585960616263646566676869707172
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2016-02-23Mark RoseManual testing212600.044
2009-03-18S485122USB-A2602610.044
2011-07-10Grant McCrackenhome2612620.087
2012-06-20GrunwalderGIMPManual testing212630.453
2016-02-23Mark RoseManual testing2622630.279
2015-01-27VictordeHollanderManual testing2632640.557
2015-01-27VictordeHollanderManual testing2642651.060
2016-03-03ramgeisManual testing2652662.120
2017-01-10Gordon SpenceManual testing2662674.241
2018-11-26TJAOIManual testing2672688.481
2021-01-19axnManual testing26826916.96
2021-03-18ANONYMOUSManual testing26927033.92
2021-03-18ANONYMOUSManual testing27027167.85
2021-03-19ANONYMOUSManual testing271272135.7


ECM factoring results:
Total ECM effort:3.446 GHz-days
Estimated T-Level:4.647
DigitsB1CompleteFacMiss
20110000.92939.476%
25500000.08691.761%
302500000.00599.459%


ECM Summary

B1B2factorcurvesGHz-days
500005000000223.104
50000675000020.342


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-09-14ANONYMOUSv4_computers1CDC0EB17A6570AB0.370
1999-12-30Sturle Sundev4_computers324DA68559D593E30.370


PRP results:
dateuseridcompidcofactorsres64
2021-06-23Chad SteenersonLulabelle14
8610481887233857410511
3B59C5D32F38123F


CERT results:
dateuseridcompid
2021-06-23Chun sung sooeunjung_Sin


P-1 factor-bounds graph:
B1 = 1000000, B2 = 145208700 (P-1 stage 2)
B1 = 500000, B2 = 145208700 (P-1 stage 2)
B1 = 1600000, B2 = 50000000 (P-1 stage 2)
B1 = 1600000 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
B1 = 340000, B2 = 3400000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 170000, B2 = 4590000 (P-1 stage 2)
B1 = 340000 (P-1 stage 1)
B1 = 170000 (P-1 stage 1)
B1 = 60000, B2 = 990000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 96424 (P-1 stage 1)
B1 = 78212 (P-1 stage 1)
B1 = 60000 (P-1 stage 1)
B1 = 20000, B2 = 245000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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1010
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TF factor-bounds graph:
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271
270
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265
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this exponent TF target: 64
TF double-checked to: 67
ECM T-Level=4.65 ~= -1-bit
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Last modified: 2024-02-09T03:30:02+00:00