is 2 3371969 - 1
has 1015064 decimal digits
takes 0.354 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LA8A3E6A604D750EDdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26935.405768.1159%40000001500000001.82068.1396%37.226270.7112%2.5952%
PrimeNet2600.045563.3333%140002800000.00432.8430%0.049964.3758%1.0424%
GPU722641.055665.6250%180003200000.00521.7893%1.060866.2401%0.6151%
Difference+5+34.3501+2.4909%+3982000+149680000+1.8153+6.3503%+36.1654+4.4711%+4.4711%

Known prime factors (1 factor, 76.3 bits, 0.00226336% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3371969943081392221176526879932376.32013984134970119484
22 × 1951 × 1791918883921
2021-10-25195117919188839216,369.814,86827,769

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-09T04:55:00Carsten Kossendeydurandal15000206250---0.004--0.692%
2011-10-17T13:42:00harleeP4_260060000930000---0.016--1.652%
2014-06-24T22:45:00Jocelyn LaroucheManual testing7903579035---0.012--0.652%
2014-10-12T23:58:00Jocelyn LaroucheManual testing9807098070---0.015--0.745%
2015-07-27T23:30:00Squeeky_SquirrelP4_26001650004331250---0.060--2.954%
2017-04-13T02:08:48Jocelyn Larouchelow 4M33000033000006---0.075--3.082%
2021-02-14T12:05:39mikrMSI400000015000000012---1.821--8.140%
2022-02-25T17:22:07Jocelyn LaroucheManual testing200000200000---0.030--1.113%
2022-04-09T09:24:06Jocelyn LaroucheManual testing10000001000000---0.152--2.303%
2022-04-10T15:21:18Jocelyn LaroucheManual testing1000000126668850---1.195--6.977%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:27Mark RoseManual testing21260--0.046--
2009-03-27T06:57:00S485122USB-A260261--0.046--
2011-08-19T06:37:00markroldgamer261262--0.091--
2012-11-15T00:21:00GrunwalderGIMPManual testing21263--0.473--
2016-02-23T16:29:27Mark RoseManual testing262263--0.291--
2015-02-15T12:50:00VictordeHollanderManual testing263264--0.582--
2015-02-15T12:50:00VictordeHollanderManual testing264265--1.108--
2015-03-30T10:38:00Gordon SpenceManual testing265266--2.216--
2017-03-07T14:12:54Gordon SpenceManual testing266267--4.432--
2018-11-05T15:44:27TJAOIManual testing267268--8.865--
2021-08-01T20:43:12Jocelyn LaroucheManual testing268269--17.73--


ECM factoring results:

Old Calculation Method

Total ECM effort:8.190 GHz-days
Estimated T-Level:2.700
DigitsB1CurvesCompleteFacMiss
201100054 / 1000.54058.117%
255000054 / 2800.19382.432%

New Calculation Method

Total ECM effort:8.190 GHz-days
Estimated T-Level:2.700
DigitsB1CompleteFacMiss
20110001.78216.835%
25500000.16085.179%
302500000.01099.016%


ECM Summary

B1B2factorcurvesGHz-days
50000480000071.006
500005000000294.244
50000500000040.585
50000650000071.163
50000680000071.191


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-07-04T00:00:00ANONYMOUSv4_computersA8A3E6A604D750ED0.354


PRP results:
dateuseridcompidcofactorsres64PRP
2021-11-02T17:34:51_p95holder_TFL16_PRPt11-E_b
94308139222117652687993
87F079A4DDBA79__no
2021-11-03T08:28:28LaurVZero818
94308139222117652687993
87F079A4DDBA791Ano


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 (P-1 stage 1)
B1 = 330000, B2 = 3300000 (P-1 stage 2)
B1 = 165000, B2 = 4331250 (P-1 stage 2)
B1 = 330000 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 165000 (P-1 stage 1)
B1 = 60000, B2 = 930000 (P-1 stage 2)
B1 = 98070 (P-1 stage 1)
B1 = 79035 (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: 2022-04-10T15:21:18+00:00