is 2 12285829 - 1
has 3698404 decimal digits
takes 4.730 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LE295859092962E01double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2699.717465.2174 %1500000300000001.70426.6224 %11.421667.5208 %
Target2684.851564.7059 %90000110000000.38213.0824 %5.233665.7938 %
Difference+1+4.8659+0.5115 %+1410000+19000000+1.3221+3.5399%+6.1881+1.7270 %

Known prime factors (1 factor, 85.7 bits, 0.00069739% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
12285829619769903404310882403388492685.6802522295823115847056
24 × 31 × 21031 × 186869 × 1293949
2018-04-2818686912939491,250,1720.13800.2123

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-02-18ANONYMOUSv4_computers1450001957500--0.1363.245%
2001-07-22ANONYMOUSv4_computers185000185000--0.1031.516%
2018-04-28riccardo ubertiNomad2C43000085000001222685.6800.4855.107%
2022-02-23riccardo ubertiColab_noGPU14150000030000000
skipped known factor: 61976990340431088240338849
--1.7047.221%


Trial Factoring results:
57585960616263646566676869
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-04-19ANONYMOUSv4_computers212640.160
2013-08-03lycornManual testing2642650.304
2013-09-29NesowaManual testing2652660.608
2015-03-07ThaManual testing2662671.216
2015-07-25ThaManual testing2672682.433
2017-11-03ramgeisManual testing2682694.866


ECM factoring results:
Total ECM effort:12.915 GHz-days
Estimated T-Level:2.692
DigitsB1CompleteFacMiss
20110000.53858.365%
25500000.05294.945%
302500000.00399.666%


ECM Summary

B1B2factorcurvesGHz-days
50000500000011.584
50000144000001011.33


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-03-16ANONYMOUSv4_computersE295859092962E014.730
2004-07-26Michael Hanschov4_computersE295859092962E014.730


PRP results:
dateuseridcompidcofactorsres64
2019-02-09riccardo ubertiNomad2C
61976990340431088240338849
A1C4708973586204
2021-02-09JaytholomewJaytholomew
61976990340431088240338849
A1C4708973586204


CERT results:
dateuseridcompid
2021-02-10arachnotronMinerCPU


P-1 factor-bounds graph:
B1 = 1500000, B2 = 30000000 (P-1 stage 2)
B1 = 1500000 (P-1 stage 1)
B1 = 430000, B2 = 8500000 (P-1 stage 2)
B1 = 430000 (P-1 stage 1)
B1 = 145000, B2 = 1957500 (P-1 stage 2)
B1 = 185000 (P-1 stage 1)
B1 = 145000 (P-1 stage 1)
104
105
106
107
104
105
106
107
108
TF factor-bounds graph:
269
268
267
266
265
264
this exponent TF target: 68
TF double-checked to: 67
ECM T-Level=2.69 ~= -8-bit
250
260
270
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290
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Last modified: 2024-03-13T02:15:48+00:00