is 2 16737719 - 1
has 5038556 decimal digits
takes 9.152 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L0413B25460B8DD0Adouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2671.775364.1791%21000053550000.38884.9215%2.164065.9420%1.7629%
PrimeNet2650.435963.0769%7000024000000.15624.4243%0.592064.7105%1.6336%
GPU722697.132865.2174%12000032000000.22823.2880%7.361066.3610%1.1436%
Difference-2-5.3575-1.0383%+90000+2155000+0.1606+1.6335%-5.1970-0.4190%-0.4190%

Known prime factors (1 factor, 68.1 bits, 0.00040666% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
167377193088834983008831907612168.0669227168239020
22 × 3 × 5 × 12503 × 12299939
2017-06-0112503122999395.55570.54070.9924

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-02-24T00:00:00ANONYMOUSv4_computers2100005355000---0.389--4.922%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-12-14T00:00:00ANONYMOUSv4_computers21256--0.001--
2001-07-07T00:00:00ANONYMOUSv4_computers21265--0.436--
2016-03-15T17:29:47Mark RoseManual testing265266--0.446--
2014-09-16T13:08:00NesowaManual testing266267--0.893--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.831 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

New Calculation Method

Total ECM effort:0.831 GHz-days
Estimated T-Level:0.050
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.831


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2003-04-27T00:00:00ANONYMOUSv4_computers0413B25460B8DD0A9.152
2006-07-10T00:00:00ANONYMOUSv4_computers0413B25460B8DD0A9.152


PRP results:
No PRP results for M16737719


P-1 factor-bounds graph:
B1 = 210000, B2 = 5355000 (P-1 stage 2)
B1 = 210000 (P-1 stage 1)
103
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106
103
104
105
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108
TF factor-bounds graph:
267
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256
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260
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2100
Last modified: 2017-06-01T09:07:54+00:00