is 2 1085809 - 1
has 326862 decimal digits
takes 0.032 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LC93B080C9F060771double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual271440.296970.4225 %10858092000000000.51245.5837 %440.809372.0740 %
Target2600.141565.0000 %45001000000.00040.6535 %0.141965.2287 %
Difference+11+440.1554+5.4225 %+1081309+199900000+0.5120+4.9302%+440.6674+6.8453 %

Known prime factors (1 factor, 72.8 bits, 0.00670723% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
108580983812911841023825414972272.8283859468462732572
22 × 32 × 19 × 229 × 24639728177
2016-08-1822924639728177880.7657.693107.75

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-12-31bcp19Toshiba-740Q2000001000000012--0.0327.846%
2012-02-09bcp19Toshiba-740Q20000010000000012--0.24210.889%
2014-08-21JossManual testing259111259111--0.0113.205%
2014-11-06JossManual testing318222318222--0.0143.468%
2016-05-26JossManual testing10858091085809---5.258%
2016-07-21Bruno Victal5820K.ECM25000006250000012--0.25712.512%
2016-07-27Bruno VictalManual testing25000006250000012---12.512%
2016-08-04JossManual testing108580920000000012--0.51213.816%


Trial Factoring results:
575859606162636465666768697071
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-07-04ANONYMOUSv4_computers212560.009
2001-11-24ANONYMOUSv4_computers212570.018
2016-02-23Mark RoseManual testing2572600.124
2009-02-17Sturle Sundegimba.ifi2602610.141
2010-11-17Michael CManual testing2612620.283
2012-10-21dbaughManual testing2622630.904
2013-05-02Never Odd Or EvenManual testing2632641.808
2013-07-02Never Odd Or EvenManual testing2642653.441
2013-07-02Never Odd Or EvenManual testing2652666.882
2013-07-02Never Odd Or EvenManual testing26626713.76
2013-07-02Never Odd Or EvenManual testing26726827.53
2013-09-29Never Odd Or EvenManual testing26826955.06
2013-09-29Never Odd Or EvenManual testing269270110.1
2014-04-01Never Odd Or EvenManual testing270271220.2


ECM factoring results:
Total ECM effort:17.503 GHz-days
Estimated T-Level:25.658
DigitsB1CompleteFacMiss
201100014.8080.000%
25500001.62019.795%
302500000.13287.678%
3510000000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002799.70
50000500000020.073
25000025000000447.730


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-03-16ANONYMOUSv4_computersC93B080C9F0607710.032
2016-06-01MadPooManual testingC93B080C9F0607710.032


PRP results:
dateuseridcompidcofactorsres64
2017-09-29Oliver KruseGTX-3
8381291184102382541497
537A1432E523EA4F
2017-10-16Oliver KruseThreadripper-PC
8381291184102382541497
537A1432E523EA4F
2018-01-02ATHec2-1xh
8381291184102382541497
537A1432E523EA4F


CERT results:
No CERT results for M1085809


P-1 factor-bounds graph:
B1 = 1085809, B2 = 200000000 (P-1 stage 2)
B1 = 2500000, B2 = 62500000 (P-1 stage 2)
B1 = 200000, B2 = 100000000 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 1085809 (P-1 stage 1)
B1 = 200000, B2 = 10000000 (P-1 stage 2)
B1 = 318222 (P-1 stage 1)
B1 = 259111 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.66 ~= 69-bit
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Last modified: 2024-02-09T03:30:02+00:00