is 2 15108199 - 1
has 4548022 decimal digits
takes 7.577 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L263BD674FC726C99double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27263.299066.6667%18000038250000.27532.5856%63.574367.5285%0.8619%
PrimeNet2650.482963.0769%6500020000000.12394.1473%0.606864.6082%1.5313%
GPU722697.902165.2174%10000026000000.17182.9965%8.073966.2596%1.0423%
Difference+3+55.3969+1.4493%+80000+1225000+0.1035-0.4109%+55.5004+1.2689%+1.2689%

Known prime factors (1 factor, 80.8 bits, 0.00053498% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1510819921436803524221684432743372580.82670944271796465232
24 × 3 × 11 × 197 × 103087 × 6616271
2022-02-26103087661627130,5630.33300.4896

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-03T00:00:00ANONYMOUSv4_computers1800003825000---0.275--2.586%
2002-05-11T00:00:00ANONYMOUSv4_computers1800003825000---0.275--2.586%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-02-26T14:59:15ATHec2-P_110000002900000027P-12580.8262.094


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--
2001-01-14T00:00:00ANONYMOUSv4_computers21265--0.483--
2014-05-14T07:06:00NesowaManual testing265266--0.495--
2014-05-14T07:06:00NesowaManual testing266267--0.989--
2016-11-23T00:10:06mikrManual testing267268--1.978--
2017-10-09T09:34:40ramgeisManual testing268269--3.957--
2021-06-27T22:13:38lycornManual testing269270--7.914--
2021-09-06T18:04:32SRBaseManual testing270271--15.83--
2021-10-09T17:49:30-Anonymous-Manual testing271272--31.66--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.763 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

New Calculation Method

Total ECM effort:0.763 GHz-days
Estimated T-Level:0.050
DigitsB1CompleteFacMiss
20110000.03296.826%
25500000.00399.709%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.763


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-05-11T00:00:00ANONYMOUSv4_computersDEB0F6A975FBE5__7.577
2003-09-29T00:00:00ANONYMOUSv4_computers263BD674FC726C997.577
2005-11-27T00:00:00ANONYMOUSv4_computers263BD674FC726C997.577


PRP results:
No PRP results for M15108199


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: 2022-02-26T14:59:15+00:00