is 2 15136279 - 1
has 4556475 decimal digits
takes 7.591 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LCE2B2CDF4C60B1B0double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27263.181666.6667%18000038250000.27532.5863%63.456967.5288%0.8621%
PrimeNet2650.482063.0769%6500020000000.12394.1484%0.605964.6086%1.5317%
GPU722697.887565.2174%10000026000000.17182.9973%8.059266.2599%1.0425%
Difference+3+55.2941+1.4493%+80000+1225000+0.1035-0.4110%+55.3976+1.2688%-0.1804%

Known prime factors (1 factor, 78.7 bits, 0.00051994% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
151362794907813791191440072321832478.69916212088159816029
3 × 13 × 1459 × 37409 × 7616281
2022-10-183740976162814,735.10.32750.5636

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-10-07T00:00:00ANONYMOUSv4_computers1800003825000---0.275--2.586%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-10-18T15:43:40ATHec2-P_110000002900000027P-12478.6992.094


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-12-31T00:00:00Net_Forcev4_computers21257--0.001--
2000-12-31T00:00:00Net_Forcev4_computers21258--0.003--
2001-01-21T00:00:00marnesv4_computers21265--0.482--
2016-03-16T02:20:47Mark RoseManual testing265266--0.494--
2014-05-14T07:10:00NesowaManual testing266267--0.987--
2017-01-23T20:36:28ConductorManual testing267268--1.975--
2017-10-11T09:55:20ramgeisManual testing268269--3.950--
2021-06-29T15:25:37lycornManual testing269270--7.899--
2021-09-02T18:07:48SRBaseManual testing270271--15.80--
2021-10-15T18:41:24-Anonymous-Manual testing271272--31.60--


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)
2002-11-16T00:00:00ANONYMOUSv4_computersCE2B2CDF4C60B1B07.591
2006-02-01T00:00:00ANONYMOUSv4_computersCE2B2CDF4C60B1B07.591


PRP results:
No PRP results for M15136279


P-1 factor-bounds graph:
B1 = 1000000, B2 = 29000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 180000, B2 = 3825000 (P-1 stage 2)
B1 = 180000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-10-18T15:43:40+00:00