is 2 3361889 - 1
has 1012030 decimal digits
takes 0.353 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-
PRPA6A6626E825CB922verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26817.729667.6471%40000001500000001.82068.8018%19.550170.4947%2.8476%
PrimeNet2600.045763.3333%140002800000.00432.8415%0.050064.3752%1.0419%
GPU722641.058765.6250%180003000000.00511.7565%1.063866.2288%0.6038%
Difference+4+16.6709+2.0221%+3982000+149700000+1.8155+7.0453%+18.4863+4.2659%+4.2659%

Known prime factors (1 factor, 98.7 bits, 0.00293474% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
33618895016463621299583601687957320793098.66374607811580031101587351
17 × 5801 × 9091 × 832421 × 99971873
2020-12-01832421999718732.443e+100.94931.5492

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-06T05:08:00Carsten Kossendeydurandal15000206250---0.004--0.810%
2011-10-13T21:28:00harleeP4_260055000907500---0.015--1.830%
2014-06-09T10:16:00Jocelyn LaroucheManual testing7621376213---0.012--0.738%
2014-09-29T22:05:00Jocelyn LaroucheManual testing9530595305---0.015--0.845%
2015-07-17T05:43:00Squeeky_SquirrelP4_26002300006670000---0.088--3.807%
2020-12-01T16:46:09mikrMSI4000000150000000123098.6631.8210.7063.6418.802%
2022-04-08T06:40:58Jocelyn LaroucheManual testing1000000115661700-
skipped known factor: 501646362129958360168795732079
--1.104--7.507%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:26Mark RoseManual testing21260--0.046--
2009-03-27T18:51:00S485122USB-A260261--0.046--
2011-09-01T08:55:00Grant McCrackenthumper261262--0.091--
2012-11-15T00:21:00GrunwalderGIMPManual testing21263--0.475--
2016-02-23T16:29:26Mark RoseManual testing262263--0.292--
2015-02-11T09:07:00VictordeHollanderManual testing263264--0.584--
2015-02-11T09:07:00VictordeHollanderManual testing264265--1.111--
2016-03-04T09:43:21ramgeisManual testing265266--2.223--
2017-03-07T14:12:50Gordon SpenceManual testing266267--4.446--
2018-12-03T19:08:39TJAOIManual testing267268--8.891--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.194 GHz-days
Estimated T-Level:0.750
DigitsB1CurvesCompleteFacMiss
201100015 / 1000.15086.006%
255000015 / 2800.05494.775%

New Calculation Method

Total ECM effort:2.194 GHz-days
Estimated T-Level:0.750
DigitsB1CompleteFacMiss
20110000.48461.639%
25500000.04495.721%
302500000.00399.731%


ECM Summary

B1B2factorcurvesGHz-days
500005000000152.194


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-07-27T00:00:00ANONYMOUSv4_computers973F02280C5089__0.353


PRP results:
dateuseridcompidcofactorsres64PRP
2020-12-01T17:53:06SRJ2877LTOS
501646362129958360168795732079
A6A6626E825CB922no


P-1 factor-bounds graph:
B1 = 4000000, B2 = 150000000 (P-1 stage 2)
B1 = 1000000, B2 = 115661700 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
B1 = 230000, B2 = 6670000 (P-1 stage 2)
B1 = 230000 (P-1 stage 1)
B1 = 55000, B2 = 907500 (P-1 stage 2)
B1 = 95305 (P-1 stage 1)
B1 = 76213 (P-1 stage 1)
B1 = 55000 (P-1 stage 1)
B1 = 15000, B2 = 206250 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
250
260
270
280
290
2100
Last modified: 2022-04-08T06:40:58+00:00