is 2 15143287 - 1
has 4558584 decimal digits
takes 7.595 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LA55A0706E29B0931double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual273126.316367.1233%17000021675000.20281.9904%126.519167.7777%0.6544%
PrimeNet2650.481863.0769%6500020000000.12394.1486%0.605764.6087%1.5318%
GPU722697.883865.2174%10000026000000.17182.9975%8.055666.2600%1.0426%
Difference+4+118.4325+1.9059%+70000-432500+0.0310-1.0071%+118.4635+1.5177%-0.3882%

Known prime factors (1 factor, 121.1 bits, 0.00079987% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
15143287290187542519211915204487706464967878337121.12695813921547947917517672255193
32 × 11 × 23 × 79 × 1093 × 6091 × 135101 × 720617 × 821801
2022-11-027206178218011.154e+100.52811.0665

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-16T00:00:00ANONYMOUSv4_computers225000225000---0.164--0.905%
2002-08-17T00:00:00ANONYMOUSv4_computers1700002167500---0.203--1.990%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-11-02T20:06:07ATHec2-P_11000000100000027P-137121.1261.105


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--
2001-04-08T00:00:00ANONYMOUSv4_computers21265--0.482--
2016-03-16T02:32:10Mark RoseManual testing265266--0.493--
2014-05-14T07:11:00NesowaManual testing266267--0.987--
2017-12-24T18:15:20ramgeisManual testing267268--1.974--
2017-12-24T18:15:20ramgeisManual testing268269--3.948--
2021-06-30T12:29:01lycornManual testing269270--7.896--
2021-08-25T03:03:02ChuckGPU72_TF270271--15.79--
2021-09-16T22:12:02Dylan DelgadoGPU72_TF271272--31.58--
2021-12-01T00:47:01Dylan DelgadoGPU72_TF272273--63.16--


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)
2002-10-19T00:00:00ANONYMOUSv4_computersA55A0706E29B09317.595
2006-10-24T00:00:00ANONYMOUSv4_computersA55A0706E29B09317.595


PRP results:
dateuseridcompidcofactorsres64PRP
2022-11-09T14:47:10Naegi Makoto1700
2901875425192119152044877064649678783
F6B1677943CFB08Fno


P-1 factor-bounds graph:
B1 = 1000000 (P-1 stage 1)
B1 = 170000, B2 = 2167500 (P-1 stage 2)
B1 = 225000 (P-1 stage 1)
B1 = 170000 (P-1 stage 1)
104
105
106
104
105
106
107
TF factor-bounds graph:
273
272
271
270
269
268
267
266
265
258
257
250
260
270
280
290
2100
2110
2120
2130
Last modified: 2022-11-09T14:47:10+00:00