is 2 14037587 - 1
has 4225735 decimal digits
takes 6.228 GHz-days to do one PRP test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-LC30129426B1F07CAdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27268.126666.6667%550000126500000.77793.9106%68.904667.9702%4.8933%
PrimeNet2650.519763.0769%6000019000000.10314.0035%0.622864.5551%1.4782%
GPU722698.504865.2174%9000024000000.13892.8542%8.643766.2102%0.9928%
Difference+3+59.6218+1.4493%+460000+10250000+0.6391+1.0564%+60.2609+1.7600%+1.7600%

Known prime factors (1 factor, 81.9 bits, 0.00058330% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1403758744514696110347553515136892581.881158555370343733412
22 × 3 × 72 × 293 × 48661 × 18912763
2021-05-10486611891276346,3050.69251.2381

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-12-08T00:00:00ANONYMOUSv4_computers1750004025000---0.248--2.575%
2020-12-13T01:34:46masserManual testing5500001265000012---0.778--3.911%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-04-27T12:47:19masserManual testing5000001000000065--0.815
2021-05-01T13:42:15masserManual testing4000001680000018461--0.955
2021-05-10T12:50:31masserManual testing5000002300000027P-12581.8811.262


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-08-24T00:00:00lalerav4_computers?256--0.001--
2000-09-15T00:00:00ANONYMOUSv4_computers?265--0.266--
2014-07-22T14:14:00NesowaManual testing265266--0.532--
2015-08-20T09:21:00ThaManual testing266267--1.065--
2018-03-12T22:44:44ramgeisManual testing267268--2.129--
2018-03-12T22:44:44ramgeisManual testing268269--4.259--
2020-05-07T23:22:01masserManual testing269270--8.517--
2020-10-17T23:08:13masserManual testing270271--17.03--
2021-03-14T15:40:08masserManual testing271272--34.07--


ECM factoring results:
Total ECM effort:4.790 GHz-days
Estimated T-Level:0.250
DigitsB1CurvesCompleteFacMiss
20110005 / 1000.05095.099%
25500005 / 2800.01898.227%

ECM Summary

B1B2factorcurvesGHz-days
50000500000010.675
76620758538044.115


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-01-08T00:00:00ANONYMOUSv4_computersC30129426B1F07CA6.228
2006-04-28T00:00:00shaneamyv4_computersC30129426B1F07CA6.228


PRP results:
Exponent "14037587" not found


P-1 factor-bounds graph:
B1 = 550000, B2 = 12650000 (stage 2)
B1 = 550000 (stage 1)
B1 = 175000, B2 = 4025000 (stage 2)
B1 = 175000 (stage 1)
103
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106
103
104
105
106
107
108
TF factor-bounds graph:
272
271
270
269
268
267
266
265
256
250
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270
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290
2100
Last modified: 2021-05-18T12:44:26+00:00