is 2 3759901 - 1
has 1131843 decimal digits
takes 0.395 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L039E9427EE6D3F31double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27063.552468.5714 %1600000660000000.77806.1504 %64.330470.5044 %
Target2640.946765.6250 %2200022500000.02182.1117 %0.968566.3509 %
Difference+6+62.6057+2.9464 %+1578000+63750000+0.7562+4.0387%+63.3619+4.1535 %

Known prime factors (1 factor, 84.0 bits, 0.00223478% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3759901196886923188537211171194712684.0262618246107923283235
5 × 523649221584656647
2021-11-0455236492215846566471,042,0144.345e+98.115e+9

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-07-11Carsten Kossendeymother20000265000--0.0051.782%
2013-03-19Squeeky_SquirrelP4_260011000020350006--0.0334.151%
2016-01-05mikrMSI16000006600000012--0.77810.151%
2022-03-03JossManual testing9000090000--0.0141.462%
2022-03-22JossManual testing100000100000--0.0151.544%
2022-05-24JossManual testing100000130364850--1.3028.120%


Trial Factoring results:
5758596061626364656667686970
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2009-03-03S485122USB-Z2602610.041
2011-04-20markrManual testing212620.082
2012-04-21GrunwalderGIMPManual testing212630.424
2016-02-23Mark RoseManual testing2622630.261
2015-01-25VictordeHollanderManual testing2632640.522
2015-01-25VictordeHollanderManual testing2642650.994
2016-02-28ramgeisManual testing2652661.987
2016-11-07Gordon SpenceManual testing2662673.975
2019-01-28TJAOIManual testing2672687.950
2019-02-08YxinityManual testing267268
2020-10-26TJAOIManual testing26826915.90
2021-03-27axnManual testing26927031.80


ECM factoring results:
Total ECM effort:3.900 GHz-days
Estimated T-Level:20.464
DigitsB1CompleteFacMiss
20110001.00336.670%
25500000.09391.146%
302500000.00699.414%


ECM Summary

B1B2factorcurvesGHz-days
500005000000121.645
50000670000061.038
50000675000071.216


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-03-27ANONYMOUSv4_computers039E9427EE6D3F310.395


PRP results:
dateuseridcompidcofactorsres64
2021-11-05kutensterra
19688692318853721117119471
C5AFC2B13253D7A4


CERT results:
dateuseridcompid
2021-11-05Ben Deloi-0bae8b7fa750e61ef


P-1 factor-bounds graph:
B1 = 100000, B2 = 130364850 (P-1 stage 2)
B1 = 1600000, B2 = 66000000 (P-1 stage 2)
B1 = 1600000 (P-1 stage 1)
B1 = 110000, B2 = 2035000 (P-1 stage 2)
B1 = 110000 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
B1 = 20000, B2 = 265000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 64
TF double-checked to: 67
ECM T-Level=20.46 ~= 51-bit
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Last modified: 2024-03-03T02:29:32+00:00