is 2 1090963 - 1
has 328413 decimal digits
takes 0.032 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L1EFB036BA3382253double-checked
PRP206C7412FB9AFE72PRP-tested

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual271438.216870.4225%27346622734662000.75146.5373%438.968272.3561%1.9336%
PrimeNet2560.008862.5000%4500650000.00032.0241%0.009163.2590%0.7590%
GPU722600.140865.0000%4500220000.00020.6824%0.141065.2388%0.2388%
Difference+11+438.0760+5.4225%+2730162+273444200+0.7512+5.8549%+438.8272+7.1173%+1.6947%

Known prime factors (1 factor, 128.6 bits, 0.01178955% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
109096352285583898666941564312087633941407430339128.620239630417799077244435934525891077
3 × 31 × 353 × 1553 × 55547 × 712007 × 4595869 × 25858321
2022-04-014595869258583211.398e+110.24730.4020

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-01-02T02:41:00bcp19Toshiba-740Q20000010000000---0.032--2.489%
2012-02-06T00:47:00bcp19Toshiba-740Q200000100000000---0.242--3.742%
2014-08-21T02:33:00Jocelyn LaroucheManual testing258832258832---0.011--0.809%
2014-11-06T23:05:00Jocelyn LaroucheManual testing317664317664---0.014--0.904%
2016-05-24T01:19:53Jocelyn LaroucheManual testing10909631090963---0.047--1.626%
2016-07-22T18:09:40Bruno Victal5820K-factoring25000006250000012---0.248--5.102%
2016-07-27T11:35:34Bruno VictalManual testing25000006250000012---0.248--5.102%
2016-08-09T03:06:52Jocelyn LaroucheManual testing109096320000000012---0.513--5.590%
2016-11-04T12:48:24Jocelyn Larouchelow 4M13091551309155---0.056--1.755%
2016-11-07T03:32:58Jocelyn Larouchelow 4M18851831885183---0.081--2.031%
2016-11-08T17:06:57Jocelyn Larouchelow 4M22622192262219---0.097--2.177%
2016-11-11T17:06:21Jocelyn Larouchelow 4M27146622714662---0.117--2.329%
2017-12-09T13:01:38Jocelyn Larouchelow 4M273466227346620012---0.751--6.537%
2022-04-01T04:56:07axnManual testing270000002700000039128.6201.1600.0652.3214.724%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-11-24T00:00:00ANONYMOUSv4_computers21257--0.018--
2016-02-23T16:28:21Mark RoseManual testing257260--0.123--
2009-02-21T08:43:00Sturle Sundeaalto.ifi260261--0.141--
2010-11-18T07:15:00Michael CManual testing261262--0.282--
2012-10-26T08:03:00dbaughManual testing262263--0.900--
2013-05-10T19:38:00Never Odd Or EvenManual testing263264--1.800--
2013-10-07T20:32:00David CampeauManual testing264265--3.425--
2014-02-22T13:32:00Never Odd Or EvenManual testing265266--6.850--
2014-02-22T13:32:00Never Odd Or EvenManual testing266267--13.70--
2014-02-22T13:32:00Never Odd Or EvenManual testing267268--27.40--
2014-02-22T13:32:00Never Odd Or EvenManual testing268269--54.80--
2014-02-22T13:32:00Never Odd Or EvenManual testing269270--109.6--
2014-04-01T16:50:00Never Odd Or EvenManual testing270271--219.2--


ECM factoring results:
Total ECM effort:17.640 GHz-days
Estimated T-Level:25.658
DigitsB1CompleteFacMiss
201100014.7970.000%
25500001.61919.805%
302500000.13287.678%
3510000000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002779.74
500001274659930.166
25000025000000447.735


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-03-24T00:00:00ANONYMOUSv4_computers1EFB036BA33822530.032
2016-06-01T18:47:57MadPooManual testing1EFB036BA33822530.032


PRP results:
dateuseridcompidcofactorsres64PRP
2022-04-01T19:13:38SRJ2877LTOS
522855838986669415643120876339414074303
206C7412FB9AFE72no


P-1 factor-bounds graph:
B1 = 27000000 (P-1 stage 1)
B1 = 2734662, B2 = 273466200 (P-1 stage 2)
B1 = 1090963, B2 = 200000000 (P-1 stage 2)
B1 = 2500000, B2 = 62500000 (P-1 stage 2)
B1 = 200000, B2 = 100000000 (P-1 stage 2)
B1 = 2734662 (P-1 stage 1)
B1 = 2714662 (P-1 stage 1)
B1 = 2500000 (P-1 stage 1)
B1 = 2262219 (P-1 stage 1)
B1 = 1885183 (P-1 stage 1)
B1 = 1309155 (P-1 stage 1)
B1 = 1090963 (P-1 stage 1)
B1 = 200000, B2 = 10000000 (P-1 stage 2)
B1 = 317664 (P-1 stage 1)
B1 = 258832 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-04-01T19:13:38+00:00