is 2 519691 - 1
has 156443 decimal digits
takes 0.008 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L3DD921A5239FD2B1double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26757.176171.6418 %2500000010000000001.651911.5516 %58.828174.9176 %
Target2440.000056.8182 %900015000000.001914.5895 %0.001963.1182 %
Difference+23+57.1761+14.8236 %+24991000+998500000+1.6500-3.0379 %+58.8261+11.7994 %

Known prime factors (1 factor, 93.4 bits, 0.01798096% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
519691134856026605653160693260997672993.44512974635562829947092913
12974635562829947092913
2020-01-251129746355628299470929135.709e+91.495e+132.792e+13

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2000-12-07Alex Kruppav4_computers1000004000000--0.00723.952%
2002-08-31ANONYMOUSv4_computers65536655360012--0.00924.844%
2003-04-27ANONYMOUSv4_computers1310721310720030--0.01827.438%
2011-05-24JossManual testing10000001000000--0.02119.613%
2012-07-14JossManual testing10393821039382--0.02219.731%
2013-01-28markrManual testing25000000100000000012--1.65242.188%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-03-15ANONYMOUSv4_computers2532540.002
2022-03-07LordJuliusManual testing254255
2001-04-01ANONYMOUSv4_computers212560.018
2001-12-22ANONYMOUSv4_computers212570.037
2003-12-13ANONYMOUSv4_computers212580.074
2016-02-23Mark RoseManual testing2582600.222
2010-12-28Sid & AndyBuzz2602610.296
2015-07-07NRManual testing2612620.591
2015-09-07Gordon SpenceManual testing2622645.667
2017-11-08BloodERazorManual testing2642657.190
2018-05-23chuenkitManual testing26526614.38


ECM factoring results:
Total ECM effort:14.712 GHz-days
Estimated T-Level:26.434
DigitsB1CompleteFacMiss
201100023.8600.000%
25500003.0254.858%
302500000.28775.066%
3510000000.02297.833%
4030000000.00199.860%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002804.266
25000025000000564.387
25000025000000886.059


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-11-09ANONYMOUSv4_computers3DD921A5239FD2B10.008
2015-04-11MadPooManual testing3DD921A5239FD2B10.008


PRP results:
dateuseridcompidcofactorsres64
2020-01-25mikrV211
13485602660565316069326099767
66E313ED884E44C1
2020-01-26marssystemssystem11
13485602660565316069326099767
66E313ED884E44C1


CERT results:
No CERT results for M519691


P-1 factor-bounds graph:
B1 = 25000000, B2 = 1000000000 (P-1 stage 2)
B1 = 25000000 (P-1 stage 1)
B1 = 1039382 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 100000, B2 = 4000000 (P-1 stage 2)
B1 = 131072 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 65536 (P-1 stage 1)
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1010
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TF factor-bounds graph:
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this exponent TF target: 44
TF double-checked to: 67
ECM T-Level=26.43 ~= 71-bit
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Last modified: 2024-03-13T02:15:48+00:00