is 2 14057863 - 1
has 4231839 decimal digits
takes 6.237 GHz-days to do one PRP test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L075357DD059096A7double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27134.007966.1972%700000021000000011.61878.7005%45.626674.8977%11.8208%
PrimeNet2650.519063.0769%6000019000000.10314.0043%0.622167.0813%4.0043%
GPU722698.492565.2174%9000024000000.13892.8548%8.631468.0722%2.8548%
Difference+2+25.5154+0.9798%+6910000+207600000+11.4798+5.8457%+36.9952+6.8255%+6.8255%

Known prime factors (1 factor, 98.8 bits, 0.00070287% known):
Remaining cofactor is PRP status unknown

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
140578635552192735998926852658347310873098.80919747641359141595179361
32 × 31 × 65129 × 1962997 × 553626643
19629975536266432020-10-224.646e+920.59936.243

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-01-02T00:00:00ANONYMOUSv4_computers200000200000---0.129--1.092%
2006-05-12T00:00:00dswansonv4_computers800001320000---0.095--1.897%
2020-09-07T00:43:35ThaZ-17015000003000000012---1.964--5.636%
2020-10-22T14:51:45masserManual testing7000000210000000123098.80911.6212.4723.248.701%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-10-15T00:00:00lalerav4_computers?259--0.003--
2000-11-15T00:00:00ANONYMOUSv4_computers?265--0.266--
2014-07-22T14:17:00NesowaManual testing265266--0.532--
2015-08-21T07:51:00ThaManual testing266267--1.063--
2018-01-24T22:56:48ramgeisManual testing267268--2.126--
2018-01-24T22:56:48ramgeisManual testing268269--4.253--
2020-05-29T14:46:27masserManual testing269270--8.505--
2020-08-14T13:33:24masserManual testing270271--17.01--


ECM factoring results:
ECM Summary

B1B2factorcurvesGHz-days
50000500000074.723


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-02-03T00:00:00ANONYMOUSv4_computers075357DD059096A76.237
2006-05-12T00:00:00dswansonv4_computers075357DD059096A76.237


PRP results:
Exponent "14057863" not found


P-1 factor-bounds graph:
B1 = 7000000, B2 = 210000000 (stage 2)
B1 = 7000000 (stage 1)
B1 = 1500000, B2 = 30000000 (stage 2)
B1 = 1500000 (stage 1)
B1 = 200000 (stage 1)
B1 = 80000, B2 = 1320000 (stage 2)
B1 = 80000 (stage 1)
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TF factor-bounds graph:
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Last modified: 2020-10-22T14:51:45+00:00