is 2 2246393 - 1
has 676232 decimal digits
takes 0.148 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L5F28F22171F138BEdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26713.227467.1642 %500000150000000.12305.1951 %13.350468.8700 %
Target2620.273564.5161 %110009500000.00591.6594 %0.279465.1050 %
Difference+5+12.9539+2.6481 %+489000+14050000+0.1171+3.5356%+13.0710+3.7651 %

Known prime factors (1 factor, 66.7 bits, 0.00296990% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
22463931211769182264566548892166.71626971442269108
22 × 797 × 1459 × 5798699
2015-12-05145957986996.57430.03030.0563

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-01-18JossManual testing5000050000--0.0051.281%
2012-01-07Squeeky_SquirrelP4_260015000032625006--0.0305.526%
2015-12-05Alexander DubrovinManual testing1000000100000001222166.7160.1428.107%
2016-04-30alpertronManual testing5000001500000012
skipped known factor: 121176918226456654889
---8.290%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2009-01-10Sturle Sundecelair.ifi2602610.068
2012-05-03Sebastian HornbostelManual testing2612620.137
2013-12-04LaurVManual testing2622630.437
2015-03-10VictordeHollanderManual testing2632640.874
2015-03-10VictordeHollanderManual testing2642651.663
2015-10-27ramgeisManual testing2652663.327


ECM factoring results:
Total ECM effort:7.450 GHz-days
Estimated T-Level:21.500
DigitsB1CompleteFacMiss
20110003.2213.991%
25500000.30074.076%
302500000.01998.113%


ECM Summary

B1B2factorcurvesGHz-days
500005000000221.748
500007000000575.702


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-06-09ANONYMOUSv4_computers5F28F22171F138BE0.148
2002-06-23ANONYMOUSv4_computers5F28F22171F138BE0.148


PRP results:
dateuseridcompidcofactorsres64
2017-09-30alpertronManual testing
121176918226456654889
8F1D12D4FEA4DD4C
2017-10-29Oliver KruseGTX-1
121176918226456654889
8F1D12D4FEA4DD4C


CERT results:
No CERT results for M2246393


P-1 factor-bounds graph:
B1 = 1000000, B2 = 10000000 (P-1 stage 2)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 500000 (P-1 stage 1)
B1 = 150000, B2 = 3262500 (P-1 stage 2)
B1 = 150000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
TF factor-bounds graph:
266
265
264
263
262
261
this exponent TF target: 62
TF double-checked to: 67
ECM T-Level=21.5 ~= 55-bit
250
260
270
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Last modified: 2024-02-29T14:28:04+00:00