is 2 14991737 - 1
has 4512963 decimal digits
takes 7.179 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L8F33BCCAEBF72790double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2671.982064.1791 %30000032070885012.33019.4761 %14.312167.5735 %
Target2697.963565.2174 %100000130000000.55752.9931 %8.521066.2585 %
Difference-2-5.9815-1.0383 %+200000+307708850+11.7726+6.4830%+5.7911+1.3151 %

Known prime factors (1 factor, 78.3 bits, 0.00052238% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
149917373756192334812581571554392478.31412527542121411887
19 × 89 × 743 × 8663 × 1150973
2017-05-14866311509737,377.40.04920.0813

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-03-03curtiscv4_computers225000225000--0.1561.516%
2017-05-14ThaManual testing3000006000000622478.3140.4244.237%
2023-04-03nordisweet16_30.8b14300000300000--0.2081.733%
2023-05-26nordisweet16_30.8b14300000320708850
skipped known factor: 375619233481258157155439
--14.667.948%


Trial Factoring results:
57585960616263646566676869
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-08-24Net_Forcev4_computers212570.001
2000-09-15Net_Forcev4_computers212580.003
2000-09-29Net_Forcev4_computers212590.003
2001-01-08ANONYMOUSv4_computers212650.249
2014-06-23NesowaManual testing2652660.498
2015-10-25NesowaManual testing2662670.997


ECM factoring results:
Total ECM effort:0.728 GHz-days
Estimated T-Level:0.192
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.728


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-08-10curtiscv4_computers8F33BCCAEBF727907.179
2005-11-13Stephen Woodv4_computers8F33BCCAEBF727907.179


PRP results:
dateuseridcompidcofactorsres64
2023-06-06Perigbronnlar
375619233481258157155439
5E3250DB3D41B999


CERT results:
dateuseridcompid
2023-06-06iwessrvwes28


P-1 factor-bounds graph:
B1 = 300000, B2 = 320708850 (P-1 stage 2)
B1 = 300000, B2 = 6000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 225000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
266
265
259
258
257
this exponent TF target: 69
TF double-checked to: 67
ECM T-Level=0.19 ~= -16-bit
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00