is 2 15153419 - 1
has 4561634 decimal digits
takes 7.600 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L85DF248BCD12D2A7double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27263.110166.6667%30000060000000.44403.1083%63.554167.7028%1.0361%
PrimeNet2650.481563.0769%6500020000000.12394.1490%0.605464.6089%1.5320%
GPU722697.878565.2174%10000026000000.17182.9978%8.050366.2601%1.0427%
Difference+3+55.2316+1.4493%+200000+3400000+0.2722+0.1105%+55.5038+1.4427%-0.0066%

Known prime factors (1 factor, 89.6 bits, 0.00059109% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
151534199189597858590348823280873672789.57030321862869991085257
31 × 53881 × 18153423446287
2022-11-22538811815342344628714,786,638719,2511,343,361

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-16T00:00:00ANONYMOUSv4_computers225000225000---0.164--1.033%
2016-08-08T01:37:01ThaManual testing300000600000012---0.444--3.108%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-11-22T19:44:47ATHec2-P_11000000100000027P+12789.5701.105


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--
2001-02-11T00:00:00ANONYMOUSv4_computers21265--0.481--
2016-03-16T02:32:10Mark RoseManual testing265266--0.493--
2014-05-14T07:13:00NesowaManual testing266267--0.986--
2017-12-24T18:15:27ramgeisManual testing267268--1.973--
2017-12-24T18:15:27ramgeisManual testing268269--3.945--
2021-07-01T22:00:53lycornManual testing269270--7.890--
2021-09-02T18:04:57SRBaseManual testing270271--15.78--
2021-10-10T15:22:57-Anonymous-Manual testing271272--31.56--


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)
2002-06-02T00:00:00ANONYMOUSv4_computers85DF248BCD12D2A77.600
2006-01-15T00:00:00ahmeraliv4_computers85DF248BCD12D2A77.600


PRP results:
No PRP results for M15153419


P-1 factor-bounds graph:
B1 = 1000000 (P+1 stage 1)
B1 = 300000, B2 = 6000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 225000 (P-1 stage 1)
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1010
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1014
TF factor-bounds graph:
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Last modified: 2022-11-22T19:44:47+00:00