is 2 3308369 - 1
has 995919 decimal digits
takes 0.347 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LFC265904EFE5CC3Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26818.016467.6471 %40000001500000001.82068.7885 %19.836970.4904 %
Target2641.075965.6250 %1700015000000.01491.7230 %1.090766.2173 %
Difference+4+16.9405+2.0221 %+3983000+148500000+1.8057+7.0655%+18.7462+4.2731 %

Known prime factors (1 factor, 70.2 bits, 0.00212038% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
330836913100490171176564830492270.150197990160274996
22 × 821 × 1493 × 40381333
2020-02-15149340381333110.960.33530.6258

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-07-03Carsten Kossendeymother15000195000--0.0041.467%
2011-09-30USAFSSP4_2600550008800006--0.0152.995%
2012-11-16Squeeky_SquirrelP4_260018000032850006--0.0534.829%
2017-05-30JossManual testing36000036000006--0.0825.301%
2020-02-15mikrMSI40000001500000001222270.1501.56211.855%
2022-04-09JossManual testing1000000115661700
skipped known factor: 1310049017117656483049
--1.10410.456%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-07-07David Campeauv4_computers212600.023
2009-03-31S485122USB-A2602610.046
2011-09-06markrManual testing212620.093
2011-10-26Aaron HavilandManual testing2622652.020
2016-02-29ramgeisManual testing2652662.259
2017-02-24Gordon SpenceManual testing2662674.517
2018-12-03TJAOIManual testing2672689.035


ECM factoring results:
Total ECM effort:1.925 GHz-days
Estimated T-Level:2.885
DigitsB1CompleteFacMiss
20110000.57756.162%
25500000.05394.802%
302500000.00399.664%


ECM Summary

B1B2factorcurvesGHz-days
500005000000151.925


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-07-04ANONYMOUSv4_computersFC265904EFE5CC3C0.347


PRP results:
dateuseridcompidcofactorsres64
2020-02-15Christoph ZengerManual testing
1310049017117656483049
3F49EB7FC3F94459
2020-02-15mikrMSI
1310049017117656483049
3F49EB7FC3F94459
2020-02-16xyuzyzvj20a
1310049017117656483049
3F49EB7FC3F94459


CERT results:
No CERT results for M3308369


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 = 360000, B2 = 3600000 (P-1 stage 2)
B1 = 360000 (P-1 stage 1)
B1 = 180000, B2 = 3285000 (P-1 stage 2)
B1 = 180000 (P-1 stage 1)
B1 = 55000, B2 = 880000 (P-1 stage 2)
B1 = 55000 (P-1 stage 1)
B1 = 15000, B2 = 195000 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
TF factor-bounds graph:
268
267
266
265
262
261
260
this exponent TF target: 64
TF double-checked to: 67
ECM T-Level=2.88 ~= -7-bit
250
260
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Last modified: 2024-03-13T02:15:48+00:00