is 2 3389521 - 1
has 1020348 decimal digits
takes 0.356 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP2AD8D63DBA697E7Dverified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26935.222368.1159%40000001500000001.82068.1436%37.042970.7125%2.5965%
PrimeNet2600.045363.3333%140002800000.00432.8456%0.049764.3767%1.0434%
GPU722641.050165.6250%180003200000.00521.7910%1.055366.2407%0.6157%
Difference+5+34.1722+2.4909%+3982000+149680000+1.8153+6.3526%+35.9875+4.4718%+4.4718%

Known prime factors (1 factor, 76.9 bits, 0.00226891% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
33895211415119032105331108421512476.90520874911707367075
52 × 43 × 349 × 55640465669
2021-07-03349556404656697,950.3461.66862.25

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-10T14:35:00Carsten Kossendeydurandal15000206250---0.004--0.693%
2011-10-22T14:35:00harleeP4_260060000945000---0.016--1.660%
2014-07-04T02:22:00Jocelyn LaroucheManual testing7893678936---0.012--0.652%
2014-10-13T22:29:00Jocelyn LaroucheManual testing9787297872---0.015--0.745%
2015-09-23T06:58:57Squeeky_SquirrelP4_26001550004030000---0.056--2.878%
2017-02-04T18:42:45Jocelyn Larouchelow 4M193261193261---0.029--1.094%
2017-04-03T00:18:30Jocelyn Larouchelow 4M31000031000006---0.070--3.014%
2021-06-05T12:48:59mognutsManual testing100000030000000---0.393--5.535%
2021-06-18T13:05:03mikrMSI400000015000000012---1.821--8.144%
2022-02-25T17:22:00Jocelyn LaroucheManual testing200000200000---0.030--1.114%
2022-04-09T09:24:13Jocelyn LaroucheManual testing10000001000000---0.152--2.305%
2022-04-10T15:21:21Jocelyn LaroucheManual testing1000000126668850---1.195--6.981%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:27Mark RoseManual testing21260--0.045--
2009-03-25T20:44:00S485122USB-A260261--0.045--
2011-08-14T21:47:00Grant McCrackenthumper261262--0.091--
2012-11-15T00:22:00GrunwalderGIMPManual testing21263--0.471--
2016-02-23T16:29:27Mark RoseManual testing262263--0.290--
2015-02-15T12:50:00VictordeHollanderManual testing263264--0.579--
2015-02-15T12:50:00VictordeHollanderManual testing264265--1.102--
2015-04-03T10:50:00Gordon SpenceManual testing265266--2.205--
2017-03-11T02:07:06Gordon SpenceManual testing266267--4.409--
2018-09-24T14:19:06TJAOIManual testing267268--8.819--
2021-07-01T17:21:14TJAOIManual testing268269--17.64--


ECM factoring results:

Old Calculation Method

Total ECM effort:5.444 GHz-days
Estimated T-Level:1.850
DigitsB1CurvesCompleteFacMiss
201100037 / 1000.37068.945%
255000037 / 2800.13287.601%

New Calculation Method

Total ECM effort:5.444 GHz-days
Estimated T-Level:1.850
DigitsB1CompleteFacMiss
20110001.42624.020%
25500000.13287.636%
302500000.00899.171%


ECM Summary

B1B2factorcurvesGHz-days
500005000000365.274
50000680000010.170


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-06-26T00:00:00ANONYMOUSv4_computers39AEC4C8CA746A__0.356


PRP results:
dateuseridcompidcofactorsres64PRP
2021-07-04T07:16:47kutenssol
141511903210533110842151
2AD8D63DBA697E7Dno


P-1 factor-bounds graph:
B1 = 4000000, B2 = 150000000 (P-1 stage 2)
B1 = 1000000, B2 = 126668850 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 310000, B2 = 3100000 (P-1 stage 2)
B1 = 155000, B2 = 4030000 (P-1 stage 2)
B1 = 310000 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 193261 (P-1 stage 1)
B1 = 155000 (P-1 stage 1)
B1 = 60000, B2 = 945000 (P-1 stage 2)
B1 = 97872 (P-1 stage 1)
B1 = 78936 (P-1 stage 1)
B1 = 60000 (P-1 stage 1)
B1 = 15000, B2 = 206250 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-04-10T15:21:21+00:00