is 2 15004859 - 1
has 4516913 decimal digits
takes 7.186 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LCE3F4D467334293Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual273127.481767.1233%18500043475000.28592.3880%127.767667.9084%0.7851%
PrimeNet2650.486263.0769%6500020000000.11834.1431%0.604664.6067%1.5298%
GPU722697.956565.2174%10000026000000.16402.9935%8.120666.2586%1.0412%
Difference+4+119.5251+1.9059%+85000+1747500+0.1219-0.6054%+119.6470+1.6498%+1.6498%

Known prime factors (1 factor, 74.7 bits, 0.00049787% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
15004859307737185239887974355912374.7041025458437296505
3 × 5 × 29 × 93553 × 25198291
2022-02-049355325198291389.921.01471.7805

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-08-31T00:00:00ANONYMOUSv4_computers1850004347500---0.286--2.388%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-02-04T01:20:44ATHec2-P_110000002800000027P-12374.7042.057


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-12-31T00:00:00ANONYMOUSv4_computers21265--0.486--
2014-06-11T15:14:00NesowaManual testing265266--0.498--
2014-06-11T15:14:00NesowaManual testing266267--0.996--
2015-10-09T15:15:14mikrManual testing267268--1.992--
2017-09-30T18:03:30ramgeisManual testing268269--3.984--
2020-05-31T11:10:15YxinityManual testing269270--7.968--
2021-09-02T17:56:04SRBaseManual testing270271--15.94--
2021-10-09T17:48:36-Anonymous-Manual testing271272--31.87--
2022-01-26T12:06:01LaurVGPU72_TF272273--63.75--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.728 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

New Calculation Method

Total ECM effort:0.728 GHz-days
Estimated T-Level:0.050
DigitsB1CompleteFacMiss
20110000.03296.826%
25500000.00399.709%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.728


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-09-14T00:00:00ANONYMOUSv4_computersCE3F4D467334293C7.186
2005-09-03T00:00:00ANONYMOUSv4_computersCE3F4D467334293C7.186


PRP results:
No PRP results for M15004859


P-1 factor-bounds graph:
B1 = 1000000, B2 = 28000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 185000, B2 = 4347500 (P-1 stage 2)
B1 = 185000 (P-1 stage 1)
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TF factor-bounds graph:
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2100
Last modified: 2022-02-04T01:20:44+00:00