is 2 15004267 - 1
has 4516735 decimal digits
takes 7.185 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L2559A85A4F9F5BFEdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27263.737466.6667%500000200000001.08494.2526%64.822468.0842%1.4175%
PrimeNet2650.486263.0769%6500020000000.11834.1431%0.604664.6067%1.5298%
GPU722697.956965.2174%10000026000000.16402.9934%8.120966.2586%1.0412%
Difference+3+55.7806+1.4493%+400000+17400000+0.9209+1.2591%+56.7015+1.8256%+1.8256%

Known prime factors (1 factor, 76.8 bits, 0.00051175% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
150042671300830309067004034389532476.7844334867904800028
22 × 3 × 59 × 231299 × 26470909
2022-02-03231299264709091,083.61.15331.8704

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-10T00:00:00Steffen Zahnv4_computers1800003465000---0.249--2.525%
2020-06-12T02:29:03ThaZ-1705000002000000012---1.085--4.253%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-02-03T07:05:07ATHec2-P_110000002900000027P-12476.7842.094


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-03-25T00:00:00ANONYMOUSv4_computers21265--0.486--
2014-06-11T15:14:00NesowaManual testing265266--0.498--
2014-06-11T15:14:00NesowaManual testing266267--0.996--
2015-10-07T16:58:21mikrManual testing267268--1.992--
2017-09-30T18:03:30ramgeisManual testing268269--3.984--
2020-05-30T03:03:57YxinityManual testing269270--7.969--
2021-09-02T18:20:14SRBaseManual testing270271--15.94--
2021-10-09T17:48:35-Anonymous-Manual testing271272--31.87--


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)
2002-03-31T00:00:00Steffen Zahnv4_computers2559A85A4F9F5BFE7.185
2005-09-22T00:00:00Team Prime Ribv4_computers2559A85A4F9F5BFE7.185


PRP results:
No PRP results for M15004267


P-1 factor-bounds graph:
B1 = 1000000, B2 = 29000000 (P-1 stage 2)
B1 = 500000, B2 = 20000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 500000 (P-1 stage 1)
B1 = 180000, B2 = 3465000 (P-1 stage 2)
B1 = 180000 (P-1 stage 1)
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TF factor-bounds graph:
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2100
Last modified: 2022-02-03T07:05:07+00:00