is 2 10479383 - 1
has 3154609 decimal digits
takes 3.423 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LFC908986C429C1B8double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2672.835564.1791 %13000026000000.12533.7208 %2.960865.5119 %
Target2685.687864.7059 %7000085000000.25072.7040 %5.938565.6602 %
Difference-1-2.8524-0.5268 %+60000-5900000-0.1254+1.0167%-2.9777-0.1483 %

Known prime factors (1 factor, 71.8 bits, 0.00068498% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1047938340598169208409855015032271.782193704959578297
193704959578297
2016-11-09119370495957829745.6214,998,8799,336,514

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-10-31Team Prime Ribv4_computers6000010500006--0.0542.333%
2013-07-20NesowaEPC13000026000006--0.1253.330%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-08ANONYMOUSv4_computers212640.187
2013-12-20lycornManual testing2642650.357
2015-05-04ThaManual testing2652660.713
2015-12-11VictordeHollanderManual testing2662671.426


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)
2000-08-10ANONYMOUSv4_computersFC908986C429C1B83.423
2003-11-16ANONYMOUSv4_computersFC908986C429C1B83.423


PRP results:
dateuseridcompidcofactorsres64
2020-08-09mrhw
4059816920840985501503
DDD67B8C84FC3EC9
2021-03-07freiburgerSpeicher
4059816920840985501503
DDD67B8C84FC3EC9


CERT results:
dateuseridcompid
2021-03-07Evil Geniuszenstation2


P-1 factor-bounds graph:
B1 = 130000, B2 = 2600000 (P-1 stage 2)
B1 = 130000 (P-1 stage 1)
B1 = 60000, B2 = 1050000 (P-1 stage 2)
B1 = 60000 (P-1 stage 1)
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106
100
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1010
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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
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Last modified: 2024-02-09T03:30:02+00:00