is 2 2294689 - 1
has 690771 decimal digits
takes 0.155 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L9EC4F939B409459Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26825.975167.6471 %3000000900000000.75827.6828 %26.733370.1327 %
Target2620.267764.5161 %1200010000000.00641.7367 %0.274265.1324 %
Difference+6+25.7074+3.1309 %+2988000+89000000+0.7517+5.9461%+26.4591+5.0003 %

Known prime factors (1 factor, 70.2 bits, 0.00305999% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
229468913725011711389810016232270.217299060389259499
3 × 7 × 14240970917119
2020-08-29714240970917119104.1376,002141,951

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-08-08ANONYMOUSv4_computers2048204800--0.0010.788%
2010-11-07JossManual testing1500015000--0.0020.585%
2010-11-15JossManual testing2000020000--0.0020.721%
2010-12-03Oscar Östlin7501175011--0.0081.604%
2011-01-17Oscar Östlin8500017425006--0.0184.505%
2014-06-11JossManual testing112971112971--0.0111.966%
2014-10-03JossManual testing140942140942--0.0142.179%
2016-01-05JossManual testing35954435954406--0.0546.178%
2019-07-09BigBrotherWinston30000009000000012--0.73812.223%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2016-02-23Mark RoseManual testing212600.067
2009-01-15Sturle Sundebruckner.ifi2602610.067
2012-05-12Sebastian HornbostelManual testing2612620.134
2013-01-23dbaughManual testing2622630.428
2015-03-12VictordeHollanderManual testing2632640.856
2015-03-12VictordeHollanderManual testing2642651.628
2015-11-04ramgeisManual testing2652663.257
2017-05-27Gordon SpenceManual testing2662676.513
2019-04-29TJAOIManual testing26726813.03


ECM factoring results:
Total ECM effort:8.072 GHz-days
Estimated T-Level:21.690
DigitsB1CompleteFacMiss
20110003.6542.589%
25500000.33871.314%
302500000.02197.890%


ECM Summary

B1B2factorcurvesGHz-days
500005000000907.642
50000500000050.430


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15ANONYMOUSv4_computers9EC4F939B409459F0.155
2018-04-29kkmrkkblmbrbkold9EC4F939B409459F0.151


PRP results:
dateuseridcompidcofactorsres64
2020-08-29ATHec2-PRPCF
1372501171138981001623
3180AB247F9216EC


CERT results:
dateuseridcompid
2020-08-29Simon Josefssoncto10


P-1 factor-bounds graph:
B1 = 3000000, B2 = 90000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 359544, B2 = 3595440 (P-1 stage 2)
B1 = 359544 (P-1 stage 1)
B1 = 85000, B2 = 1742500 (P-1 stage 2)
B1 = 140942 (P-1 stage 1)
B1 = 112971 (P-1 stage 1)
B1 = 85000 (P-1 stage 1)
B1 = 75011 (P-1 stage 1)
B1 = 20000 (P-1 stage 1)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
this exponent TF target: 62
TF double-checked to: 67
ECM T-Level=21.69 ~= 55-bit
250
260
270
280
JSON version of this page
Last modified: 2024-02-09T03:30:02+00:00