is 2 15529951 - 1
has 4674982 decimal digits
takes 7.789 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L06E1D4770AEB5993double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual274246.354067.5676 %3000000192918033078.49828.7011 %324.852370.3895 %
Target2697.687565.2174 %110000140000000.63033.1116 %8.317866.2997 %
Difference+5+238.6665+2.3502 %+2890000+1915180330+77.8679+5.5895%+316.5344+4.0899 %

Known prime factors (1 factor, 73.9 bits, 0.00047609% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
15529951180759953041644277882392373.936581972064952569
3 × 239 × 6971 × 116436167
2022-01-226971116436167241.794.61818.6163

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-05-05ANONYMOUSv4_computers1750002012500--0.2003.104%
2022-01-22Denial140i5-84003000000192918033022373.93695.2212.536%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-01-21Net_Forcev4_computers212580.002
2001-02-11Net_Forcev4_computers212590.002
2001-03-11marnesv4_computers212650.241
2016-03-16Mark RoseManual testing265266
2013-12-28NesowaManual testing2662670.962
2018-03-23ramgeisManual testing2672695.774
2021-06-03lycornManual testing2692707.699
2021-09-07SRBaseManual testing27027115.40
2021-09-14ANONYMOUSManual testing27127230.80
2022-01-25Anton RepkoManual testing272274
73.936
23


ECM factoring results:
Total ECM effort:0.763 GHz-days
Estimated T-Level:0.192
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.763


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-11-24ANONYMOUSv4_computers06E1D4770AEB59937.789
2006-05-29ANONYMOUSv4_computers06E1D4770AEB59937.789


PRP results:
dateuseridcompidcofactorsres64
2023-08-21Funky Waddlemain
18075995304164427788239
E5F5E72401B1929F


CERT results:
dateuseridcompid
2023-08-21lozcsSVCTABITHA


P-1 factor-bounds graph:
B1 = 3000000, B2 = 1929180330 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 175000, B2 = 2012500 (P-1 stage 2)
B1 = 175000 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
274
272
271
270
269
267
266
265
259
258
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