is 2 15804461 - 1
has 4757617 decimal digits
takes 8.642 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LF9D1C52837AC5BEFdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2671.880164.1791%19000038475000.30864.5102%2.188765.7947%1.6156%
PrimeNet2650.461663.0769%7000022000000.14754.3108%0.609164.6686%1.5917%
GPU722697.554065.2174%11000028000000.20343.1195%7.757466.3024%1.0850%
Difference-2-5.6739-1.0383%+80000+1047500+0.1052+1.3907%-5.5687-0.5077%-0.5077%

Known prime factors (1 factor, 67.1 bits, 0.00042437% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
158044611547683280428601955772167.0694896349456108
22 × 11 × 37 × 109 × 27592529
2017-01-04109275925292.99691.19202.2262

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-06-29T00:00:00ANONYMOUSv4_computers1900003847500---0.309--4.510%
2002-12-02T00:00:00ANONYMOUSv4_computers1900003847500---0.309--4.510%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-01-14T00:00:00Net_Forcev4_computers21258--0.002--
2001-04-08T00:00:00ANONYMOUSv4_computers21265--0.462--
2016-03-16T02:33:08Mark RoseManual testing265266--0.473--
2014-07-20T03:14:00NesowaManual testing266267--0.946--


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)
2002-10-26T00:00:00ANONYMOUSv4_computersF9D1C52837AC5BEF8.642
2002-12-02T00:00:00ANONYMOUSv4_computersF9D1C52837AC5BEF8.642
2006-03-01T00:00:00cmarblev4_computersF9D1C52837AC5BEF8.642


PRP results:
No PRP results for M15804461


P-1 factor-bounds graph:
B1 = 190000, B2 = 3847500 (P-1 stage 2)
B1 = 190000 (P-1 stage 1)
101
102
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104
105
106
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
266
265
258
250
260
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2100
Last modified: 2017-01-05T02:22:44+00:00