is 2 3082127 - 1
has 927813 decimal digits
takes 0.262 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-L0C03CF544771E22Bdouble-checked
PRP8E0895D0951B1F__verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26938.735268.1159%30000001000000001.02247.4138%39.757670.4798%2.3638%
PrimeNet2600.049863.3333%120002200000.00292.5277%0.052764.2601%0.9268%
GPU722641.154865.6250%140002200000.00311.4680%1.157966.1296%0.5046%
Difference+5+37.5804+2.4909%+2986000+99780000+1.0193+5.9459%+38.5997+4.3502%+4.3502%

Known prime factors (1 factor, 89.4 bits, 0.00290161% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
30821278346756888581440849648231912789.431135405791010257540485
5 × 461 × 58744377878636677
2021-03-314615874437787863667757,801,882394,984,143737,720,383

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-02-14T00:00:00ANONYMOUSv4_computers2048204800---0.002--0.201%
2010-09-17T16:09:00markrtiny950001995000---0.024--2.193%
2016-04-12T21:52:05Jocelyn LaroucheManual testing19000058809736---0.062--3.192%
2016-04-13T19:08:28harleeP4_2600210000598500012---0.065--3.259%
2018-03-16T11:31:21mikrMSI300000010000000012---1.022--7.414%
2022-02-20T22:18:07Jocelyn LaroucheManual testing1000000128282700---0.979--6.923%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-03-31T00:00:00ANONYMOUSv4_computers21259--0.025--
1998-07-05T00:00:00ANONYMOUSv4_computers21259--0.025--
1998-07-11T00:00:00ANONYMOUSv4_computers21259--0.025--
2001-07-03T00:00:00ANONYMOUSv4_computers21260--0.050--
2009-02-14T09:56:00Sturle Sundeherrick.ifi260261--0.050--
2011-11-11T22:43:00Sid & AndyBuzz261262--0.100--
2013-01-07T13:56:00dbaughManual testing262263--0.318--
2015-02-07T18:28:00VictordeHollanderManual testing263264--0.637--
2015-02-07T18:28:00VictordeHollanderManual testing264265--1.212--
2015-06-08T12:39:00ThaManual testing265266--2.425--
2017-05-18T12:32:20Gordon SpenceManual testing266267--4.849--
2022-01-20T22:38:01Jocelyn LaroucheManual testing267268--9.70--
2018-08-10T10:59:49ramgeisManual testing267268--9.70--
2021-03-10T09:10:09TJAOIManual testing268269--19.40--


ECM factoring results:

Old Calculation Method

Total ECM effort:6.534 GHz-days
Estimated T-Level:2.800
DigitsB1CurvesCompleteFacMiss
201100056 / 1000.56056.960%
255000056 / 2800.20081.844%

New Calculation Method

Total ECM effort:6.534 GHz-days
Estimated T-Level:2.800
DigitsB1CompleteFacMiss
20110001.80616.424%
25500000.16384.937%
302500000.01099.000%


ECM Summary

B1B2factorcurvesGHz-days
500005000000505.834
50000500000060.700


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-06-15T00:00:00ANONYMOUSv4_computers0C03CF544771E22B0.262
1999-08-22T00:00:00ANONYMOUSv4_computers0C03CF544771E22B0.262
1999-09-14T00:00:00ANONYMOUSv4_computers0C03CF544771E22B0.262


PRP results:
dateuseridcompidcofactorsres64PRP
2021-03-31T21:43:57Oliver KruseThreadripper-PC
834675688858144084964823191
8E0895D0951B1F__no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 1000000, B2 = 128282700 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
B1 = 210000, B2 = 5985000 (P-1 stage 2)
B1 = 190000, B2 = 5880973 (P-1 stage 2)
B1 = 210000 (P-1 stage 1)
B1 = 95000, B2 = 1995000 (P-1 stage 2)
B1 = 190000 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-02-20T22:18:07+00:00