is 2 17319977 - 1
has 5213833 decimal digits
takes 9.863 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L542E90D859BBCFD0double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2671.715662.6866 %30000060000000.50415.2746 %2.219764.6547 %
Target2696.893063.7681 %120000160000000.81353.3041 %7.706564.9652 %
Difference-2-5.1774-1.0815 %+180000-10000000-0.3093+1.9705%-5.4868-0.3105 %

Known prime factors (1 factor, 78.3 bits, 0.00045217% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
173199773762264116717120967382332478.31610861054020790908
22 × 3 × 11 × 461233 × 178392943
2018-01-094612331783929435,958.18.385314.989

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-12-02ANONYMOUSv4_computers275000275000--0.2271.704%
2017-11-01ThaManual testing30000060000006--0.5044.316%


Trial Factoring results:
57585960616263646566676869
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-02-25Net_Forcev4_computers212580.002
2001-04-08Net_Forcev4_computers212590.002
2001-05-13Net_Forcev4_computers212600.004
2001-09-16ANONYMOUSv4_computers212650.216
2016-03-18Mark RoseManual testing265266
2014-09-04NesowaManual testing2662670.863


ECM factoring results:
Total ECM effort:0.866 GHz-days
Estimated T-Level:0.192
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.866


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2003-05-26ANONYMOUSv4_computers542E90D859BBCFD09.86
2007-03-20ANONYMOUSv4_computers542E90D859BBCFD09.86


PRP results:
No PRP results for M17319977


CERT results:
No CERT results for M17319977


P-1 factor-bounds graph:
B1 = 300000, B2 = 6000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 275000 (P-1 stage 1)
104
105
106
104
105
106
107
108
109
TF factor-bounds graph:
267
266
265
260
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