is 2 14687843 - 1
has 4421482 decimal digits
takes 7.034 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LBDF86020800C42D1double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual273130.233267.1233 %210000053460498021.60417.6972 %151.837269.6539 %
Target2698.128365.2174 %100000130000000.55752.9841 %8.685766.2553 %
Difference+4+122.1049+1.9059 %+2000000+521604980+21.0466+4.7131%+143.1515+3.3985 %

Known prime factors (1 factor, 75.6 bits, 0.00051475% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14687843574924104103769630850172375.6061957142733973156
22 × 347 × 230861 × 6107767
2022-01-292308616107767759.580.38260.4316

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2004-08-20James Heinrichv4_computers800001460000--0.1082.502%
2004-10-18James Heinrichv4_computers800001460000--0.1082.502%
2022-01-29firejugglerMaison210000053460498022375.60624.6710.518%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-08-24Net_Forcev4_computers212560.001
2000-08-31Net_Forcev4_computers212570.001
2000-09-08Net_Forcev4_computers212580.003
2000-10-07Net_Forcev4_computers212590.003
2000-12-07ANONYMOUSv4_computers212650.254
2014-08-30NesowaManual testing2652660.509
2015-10-02NesowaManual testing2662671.018
2018-03-14ramgeisManual testing2672696.105
2021-08-10Seth_TrManual testing26927124.42
2021-10-15ANONYMOUSManual testing27127232.56
2021-12-04ANONYMOUSManual testing27227365.12


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)
2005-11-13ANONYMOUSv4_computersBDF86020800C42D17.034


PRP results:
dateuseridcompidcofactorsres64
2023-04-23TravisJankKRMPNCDT2
57492410410376963085017
D690AF449F45AEA5


CERT results:
dateuseridcompid
2023-04-23Chun sung sooJeheon_Lee


P-1 factor-bounds graph:
B1 = 2100000, B2 = 534604980 (P-1 stage 2)
B1 = 2100000 (P-1 stage 1)
B1 = 80000, B2 = 1460000 (P-1 stage 2)
B1 = 80000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
TF factor-bounds graph:
273
272
271
269
267
266
265
259
258
257
256
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