is 2 14033251 - 1
has 4224430 decimal digits
takes 6.226 GHz-days to do one PRP test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L7FA6E1B4BFE61573double-checked
PRP1DB8877D62AC7F16

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27268.147766.6667%550000126500000.77793.9105%68.925667.9702%4.8932%
PrimeNet2650.519963.0769%6000019000000.10314.0033%0.623064.5551%1.4781%
GPU722698.507465.2174%9000024000000.13892.8541%8.646366.2101%0.9927%
Difference+3+59.6403+1.4493%+460000+10250000+0.6391+1.0564%+60.2794+1.7600%+1.7600%

Known prime factors (1 factor, 76.5 bits, 0.00054496% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
140332511050401170684596485788792476.4753742543943255189
192 × 10367157737549
2021-04-24361103671577375491,125.7363,377678,687

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-01-08T00:00:00ANONYMOUSv4_computers1750004025000---0.248--2.575%
2020-12-09T16:14:53masserManual testing5500001265000012---0.778--3.910%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-04-24T19:44:44masserManual testing5000001000000065P+12476.4750.815


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-08-24T00:00:00lalerav4_computers?258--0.003--
2000-12-31T00:00:00ANONYMOUSv4_computers?265--0.266--
2014-07-22T14:14:00NesowaManual testing265266--0.533--
2015-08-20T09:21:00ThaManual testing266267--1.065--
2018-02-05T20:29:41ramgeisManual testing267268--2.130--
2018-02-05T20:29:41ramgeisManual testing268269--4.260--
2020-04-29T14:16:21masserManual testing269270--8.520--
2020-10-16T03:53:31masserManual testing270271--17.04--
2021-02-05T14:40:18masserManual testing271272--34.08--


ECM factoring results:
Total ECM effort:0.675 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

ECM Summary

B1B2factorcurvesGHz-days
50000500000010.675


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-01-15T00:00:00ANONYMOUSv4_computers7FA6E1B4BFE615736.226
2006-07-10T00:00:00shaneamyv4_computers7FA6E1B4BFE615736.226


PRP results:
dateuseridcompidcofactorsres64PRP
2021-04-25T13:30:26Zhang RuichongTriang-jyed-driung
105040117068459648578879
1DB8877D62AC7F16no


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)
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TF factor-bounds graph:
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Last modified: 2021-04-25T13:30:26+00:00