is 2 3829831 - 1
has 1152895 decimal digits
takes 0.402 GHz-days to do one PRP test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L3A0D35C92079A7BEdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26931.172968.1159%150000007500000008.382811.1403%39.555779.2562%15.9229%
PrimeNet2600.040163.3333%170003400000.00533.1921%0.045466.5255%3.1921%
GPU722640.929465.6250%240005000000.00762.2262%0.937067.8512%2.2262%
Difference+5+30.2435+2.4909%+14976000+749500000+8.3752+8.9141%+38.6187+11.4050%+11.4050%

Known prime factors (1 factor, 123.3 bits, 0.00322008% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
38298311330817855224411007190590304888918518338123.3241737436789279227996210002875961
37 × 271 × 467 × 60413 × 68771 × 224359 × 398053897
2243593980538972021-01-213.628e+103.33506.1686

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-03-17T00:00:00ANONYMOUSv4_computers1500052500---0.003--0.421%
2010-09-11T23:55:00markrtiny1050002257500---0.034--2.384%
2016-06-14T01:17:15mikrMSI20000006200000012---0.802--6.786%
2021-01-21T01:42:32axnManual testing1500000075000000038123.3248.3830.80416.7711.140%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:40Mark RoseManual testing21260--0.040--
2009-02-28T06:59:00S485122USB-A260261--0.040--
2011-03-11T12:46:00markrut261262--0.080--
2012-02-20T20:14:00GrunwalderGIMPManual testing21263--0.417--
2016-02-23T16:29:40Mark RoseManual testing262263--0.256--
2015-01-18T20:59:00VictordeHollanderManual testing263264--0.513--
2015-01-18T20:59:00VictordeHollanderManual testing264265--0.976--
2016-03-05T16:43:34ramgeisManual testing265266--1.951--
2016-11-20T02:21:04Gordon SpenceManual testing266267--3.902--
2018-09-24T14:19:00TJAOIManual testing267268--7.805--
2020-08-24T12:45:13TJAOIManual testing268269--15.61--


ECM factoring results:
ECM Summary

B1B2factorcurvesGHz-days
500005000000121.801


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-03-01T00:00:00ANONYMOUSv4_computers61C536D29134CD__0.402
2001-03-18T00:00:00ANONYMOUSv4_computers3A0D35C92079A7BE0.402


PRP results:
dateuseridcompidcofactorsres64PRP
2021-01-24T01:21:41Klaus Nordmannno1
13308178552244110071905903048889185183
CE909B8E0C36E9__no


P-1 factor-bounds graph:
B1 = 15000000, B2 = 750000000 (stage 2)
B1 = 15000000 (stage 1)
B1 = 2000000, B2 = 62000000 (stage 2)
B1 = 2000000 (stage 1)
B1 = 105000, B2 = 2257500 (stage 2)
B1 = 105000 (stage 1)
B1 = 15000, B2 = 52500 (stage 2)
B1 = 15000 (stage 1)
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TF factor-bounds graph:
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Last modified: 2021-01-24T01:21:41+00:00