is 2 10885409 - 1
has 3276835 decimal digits
takes 3.556 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L8114D669B8CD415Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2672.729764.1791 %19500041925000.19554.3863 %2.925265.7503 %
Target2685.475764.7059 %7000085000000.25072.7199 %5.726465.6659 %
Difference-1-2.7460-0.5268 %+125000-4307500-0.0552+1.6663%-2.8011+0.0844 %

Known prime factors (1 factor, 74.9 bits, 0.00068815% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
10885409354535282803031748520712374.9081628488570356115
5 × 13 × 19 × 683 × 1930621123
2017-01-096831930621123451.5149.82393.055

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2004-01-18ANONYMOUSv4_computers6000060000--0.0280.799%
2011-10-08James HeinrichQ660019500041925006--0.1963.948%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-11-10korvav4_computers212640.180
2011-09-25James HeinrichManual testing2642650.343
2015-05-18ThaManual testing2652660.686
2015-12-11VictordeHollanderManual testing2662671.373


ECM factoring results:
Total ECM effort:0.993 GHz-days
Estimated T-Level:0.385
DigitsB1CompleteFacMiss
20110000.07792.596%
25500000.00799.291%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.497
50000500000010.497


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-11-15ANONYMOUSv4_computers8114D669B8CD415E3.556
2004-03-26ANONYMOUSv4_computers8114D669B8CD415E3.556


PRP results:
dateuseridcompidcofactorsres64
2021-03-21arnaudstm-11-010
35453528280303174852071
FA083009F358C902
2021-03-23LaurVbutu
35453528280303174852071
FA083009F358C902


CERT results:
dateuseridcompid
2021-03-23Simon Josefssongran


P-1 factor-bounds graph:
B1 = 195000, B2 = 4192500 (P-1 stage 2)
B1 = 195000 (P-1 stage 1)
B1 = 60000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
266
265
264
this exponent TF target: 68
TF double-checked to: 67
ECM T-Level=0.38 ~= -15-bit
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00