is 2 12671609 - 1
has 3814535 decimal digits
takes 5.176 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L4775EB722BF9AB46double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2672.344964.1791 %50000043094415014.186310.2585 %16.531267.8538 %
Target2684.703864.7059 %90000110000000.40543.0966 %5.109265.7988 %
Difference-1-2.3589-0.5268 %+410000+419944150+13.7809+7.1620%+11.4220+2.0550 %

Known prime factors (1 factor, 80.5 bits, 0.00063532% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1267160917166190453562549832912892580.50667734849037571116
22 × 73433 × 230600850563
2016-04-157343323060085056319,3917,441.413,898

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-07-29ANONYMOUSv4_computers1600003400000--0.1993.745%
2001-08-04Smegheadsv4_computers135000978750--0.1072.706%
2002-04-28Smegheadsv4_computers135000978750--0.1072.706%
2023-10-12nordisweet16_30.8b14500000500000--0.2792.365%
2023-10-26nordisweet16_30.8b14500000430944150--16.639.445%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-03-27ANONYMOUSv4_computers212560.001
2000-04-19Baquarav4_computers212620.024
2000-04-27ANONYMOUSv4_computers212640.155
2013-06-12lycornManual testing2642650.295
2014-04-07NesowaManual testing2652660.590
2015-03-31ThaManual testing2662671.179


ECM factoring results:
Total ECM effort:0.585 GHz-days
Estimated T-Level:0.192
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.585


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2001-08-31Smegheadsv4_computers4775EB722BF9AB465.176
2002-04-28Smegheadsv4_computers4775EB722BF9AB465.176
2004-09-02mister_philv4_computers4775EB722BF9AB465.176


PRP results:
dateuseridcompidcofactorsres64
2022-04-30Poaooffice-CN2
1716619045356254983291289
B5F0DEEBB9587F2A


CERT results:
dateuseridcompid
2022-04-30curtiscgrn201--20l


P-1 factor-bounds graph:
B1 = 500000, B2 = 430944150 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 160000, B2 = 3400000 (P-1 stage 2)
B1 = 135000, B2 = 978750 (P-1 stage 2)
B1 = 160000 (P-1 stage 1)
B1 = 135000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
267
266
265
264
262
256
this exponent TF target: 68
TF double-checked to: 67
ECM T-Level=0.19 ~= -16-bit
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Last modified: 2024-03-13T02:15:48+00:00