is 2 2796043 - 1
has 841693 decimal digits
takes 0.216 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LFA9C661AC8320B5Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26710.627167.1642 %3600002873801701.79167.9903 %12.418769.7879 %
Target2630.570865.0794 %1500013000000.00951.7893 %0.580365.7042 %
Difference+4+10.0563+2.0848 %+345000+286080170+1.7821+6.2011%+11.8384+4.0837 %

Known prime factors (1 factor, 61.5 bits, 0.00219923% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
279604332415171941200975911961.491579661542065
5 × 12281 × 9439973
2010-10-071228194399730.13710.05890.1076

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-11-28ANONYMOUSv4_computers2048204800--0.0010.682%
2023-01-29USAFSS6917th_Scty_Sq360000287380170
skipped known factor: 3241517194120097591
--1.97411.272%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-03-17ANONYMOUSv4_computers212590.014
2022-03-11LordJuliusManual testing21260
2009-02-14Sturle Sundegaudi.ifi2602610.055


ECM factoring results:
Total ECM effort:0.404 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
10.162
50000500000030.243


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-07-11ANONYMOUSv4_computersFA9C661AC8320B5E0.216
1999-08-22ANONYMOUSv4_computersFA9C661AC8320B5E0.216


PRP results:
dateuseridcompidcofactorsres64
2017-10-21Oliver KruseGTX-1
3241517194120097591
737C32E5D528A6E4
2017-12-06kkmrkkblmbrbkc4.xlarge
3241517194120097591
737C32E5D528A6E4


CERT results:
No CERT results for M2796043


P-1 factor-bounds graph:
B1 = 360000, B2 = 287380170 (P-1 stage 2)
B1 = 360000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
TF factor-bounds graph:
261
260
259
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00