is 2 15137279 - 1
has 4556776 decimal digits
takes 7.592 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L2F7396B1E89B7957double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27263.177466.6667%17000024650000.21462.3077%63.391967.4359%0.7692%
PrimeNet2650.482063.0769%6500020000000.12394.1484%0.605964.6086%1.5317%
GPU722697.886965.2174%10000026000000.17182.9973%8.058766.2599%1.0425%
Difference+3+55.2904+1.4493%+70000-135000+0.0428-0.6896%+55.3332+1.1760%-0.2733%

Known prime factors (1 factor, 89.1 bits, 0.00058856% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
151372796597944712493681695628806012789.09221793694601565055700
22 × 33 × 52 × 47 × 7411 × 25951 × 892973
2022-10-21259518929738,820,1320.05320.0661

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-16T00:00:00ANONYMOUSv4_computers1700002465000---0.215--2.308%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-10-21T00:04:24ATHec2-P_11000000100000027P-12789.0921.056


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--
2001-01-28T00:00:00ANONYMOUSv4_computers21264--0.235--
2001-02-04T00:00:00ANONYMOUSv4_computers21265--0.482--
2016-03-16T02:28:14Mark RoseManual testing265266--0.494--
2014-05-14T07:10:00NesowaManual testing266267--0.987--
2017-01-29T13:29:58ConductorManual testing267268--1.975--
2017-10-11T09:55:20ramgeisManual testing268269--3.949--
2021-06-29T15:25:40lycornManual testing269270--7.899--
2021-09-02T17:59:24SRBaseManual testing270271--15.80--
2021-10-15T18:41:28-Anonymous-Manual testing271272--31.59--


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)
2002-07-20T00:00:00ANONYMOUSv4_computers2F7396B1E89B79577.592
2006-05-12T00:00:00ANONYMOUSv4_computers2F7396B1E89B79577.592


PRP results:
No PRP results for M15137279


P-1 factor-bounds graph:
B1 = 1000000 (P-1 stage 1)
B1 = 170000, B2 = 2465000 (P-1 stage 2)
B1 = 170000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-10-21T00:04:24+00:00