is 2 3276503 - 1
has 986326 decimal digits
takes 0.344 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L205E197B27FF5536double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26818.191667.6471 %10000001199121001.13897.5257 %19.330570.0818 %
Target2641.086365.6250 %1700014000000.01411.6869 %1.100466.2049 %
Difference+4+17.1053+2.0221 %+983000+118512100+1.1249+5.8387%+18.2302+3.8769 %

Known prime factors (1 factor, 64.3 bits, 0.00196162% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3276503222845006467715221692064.2733400653173028
22 × 3 × 283387764419
2009-05-2242833877644191.08632,351.34,391.6

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2021-01-03JossManual testing327650327650---2.594%
2021-01-03JossManual testing32765032765036---5.143%
2022-02-04JossManual testing1000000119912100--1.13910.496%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-05-20David Campeauv4_computers212600.023
2009-04-01S485122USB-A2602610.047
2022-04-06LordJuliusManual testing21262
2022-04-06LordJuliusManual testing262263
2022-04-06LordJuliusManual testing263264
2022-04-06LordJuliusManual testing265266
2022-04-06LordJuliusManual testing266267
2021-04-15JossManual testing267268


ECM factoring results:
Total ECM effort:0.299 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.299


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-06-06ANONYMOUSv4_computers205E197B27FF55360.344


PRP results:
dateuseridcompidcofactorsres64
2017-11-03Oliver KruseGTX-2
22284500646771522169
FF94D03A9090923D
2017-12-14Chang Chia-Tcheex01
22284500646771522169
FF94D03A9090923D


CERT results:
No CERT results for M3276503


P-1 factor-bounds graph:
B1 = 1000000, B2 = 119912100 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 327650, B2 = 3276503 (P-1 stage 2)
B1 = 327650 (P-1 stage 1)
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TF factor-bounds graph:
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267
266
264
263
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this exponent TF target: 64
TF double-checked to: 67
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Last modified: 2024-03-03T02:29:32+00:00