is 2 1891277 - 1
has 569332 decimal digits
takes 0.103 GHz-days to do one PRP test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L880E29C9B7A854BEdouble-checked
PRPC1B067C1C57EFF9B

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26963.125069.5652%18912771891277000.95127.4550%64.076271.8341%8.6762%
PrimeNet2570.010263.1579%90001600000.00143.0354%0.011564.2762%1.1183%
GPU722610.162465.5738%100001600000.00141.7258%0.163866.1679%0.5941%
Difference+8+62.9625+3.9914%+1881277+188967700+0.9498+5.7293%+63.9123+5.6663%+5.6663%

Known prime factors (1 factor, 102.8 bits, 0.00543723% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1891277903279726023796050504934816400731102.8332388015415044427787428639
37 × 18189535877 × 3548246508311
2021-06-011818953587735482465083119.491e+1016,56028,402

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-01-20T03:24:00markrtiny2750006000000---0.046--3.185%
2015-10-07T23:51:10Bruno Victal5820K-linux5000001500000012---0.101--4.186%
2016-10-27T02:08:01Jocelyn Larouche low 4MManual testing600000600000---0.047--1.716%
2016-12-24T02:11:49Jocelyn Larouche low 4MManual testing720000720000---0.057--1.856%
2016-12-26T22:10:00Jocelyn Larouche low 4MManual testing864000864000---0.068--2.002%
2017-01-21T06:59:39Jocelyn Larouche low 4MManual testing10368001036800---0.082--2.154%
2017-03-08T00:45:16Jocelyn Larouche low 4MManual testing12441601244160012---0.146--4.452%
2018-01-14T18:24:31Jocelyn Larouche low 4MManual testing18912771244160012---0.194--4.598%
2018-02-02T15:34:05Jocelyn Larouche low 4MManual testing18912772488320012---0.247--5.312%
2018-02-09T11:40:28Jocelyn Larouche low 4MManual testing18912774976640012---0.354--6.035%
2018-02-25T16:51:52Jocelyn Larouche low 4MManual testing18912779953280012---0.567--6.768%
2018-09-21T11:45:48Jocelyn Larouche low 4MManual testing189127718912770012---0.951--7.455%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-06-01T15:49:52LaurVbutu500000036500000027P+131102.8332.110


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-09T00:00:00ANONYMOUSv4_computers?258--0.020--
2016-02-23T16:28:57Mark RoseManual testing258260--0.061--
2010-04-10T20:20:00For ResearchManual testing260261--0.081--
2016-02-23T16:28:57Mark RoseManual testing261262--0.162--
2011-03-08T05:18:00GrunwalderGIMPManual testing21263--0.844--
2016-02-23T16:28:57Mark RoseManual testing262263--0.519--
2015-05-11T11:29:00snme2pm1Manual testing263264--1.038--
2015-05-11T11:29:00snme2pm1Manual testing264265--1.976--
2015-09-13T19:11:00ramgeisManual testing265266--3.951--
2018-02-05T16:30:33TJAOIManual testing266267--7.902--
2019-06-10T09:46:18TJAOIManual testing267268--15.80--
2021-06-01T10:18:06LaurVManual testing268269--31.61--


ECM factoring results:
Total ECM effort:14.350 GHz-days
Estimated T-Level:23.679
DigitsB1CurvesCompleteFacMiss
2011000206 / 1002.06012.614%
2550000206 / 2800.73647.853%

ECM Summary

B1B2factorcurvesGHz-days
50000500000019913.80
50000675000070.553


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-13T00:00:00ANONYMOUSv4_computers880E29C9B7A854BE0.103
2015-07-04T19:27:00MadPooManual testing880E29C9B7A854BE0.103


PRP results:
dateuseridcompidcofactorsres64PRP
2021-06-03T14:00:44kutensrigel
9032797260237960505049348164007
C1B067C1C57EFF9Bno


P-1 factor-bounds graph:
B1 = 1891277, B2 = 189127700 (stage 2)
B1 = 1891277, B2 = 99532800 (stage 2)
B1 = 1891277, B2 = 49766400 (stage 2)
B1 = 1891277, B2 = 24883200 (stage 2)
B1 = 1891277, B2 = 12441600 (stage 2)
B1 = 1891277 (stage 1)
B1 = 1244160, B2 = 12441600 (stage 2)
B1 = 500000, B2 = 15000000 (stage 2)
B1 = 1244160 (stage 1)
B1 = 1036800 (stage 1)
B1 = 864000 (stage 1)
B1 = 720000 (stage 1)
B1 = 600000 (stage 1)
B1 = 275000, B2 = 6000000 (stage 2)
B1 = 500000 (stage 1)
B1 = 275000 (stage 1)
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TF factor-bounds graph:
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Last modified: 2021-06-03T14:00:44+00:00