is 2 2230643 - 1
has 671491 decimal digits
takes 0.147 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L38E68BC59B3DA424double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26713.320867.1642 %2000000650000000.51797.6566 %13.838769.6783 %
Target2620.275464.5161 %110009000000.00571.6314 %0.281165.0950 %
Difference+5+13.0454+2.6481 %+1989000+64100000+0.5122+6.0252%+13.5576+4.5833 %

Known prime factors (1 factor, 66.7 bits, 0.00299050% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
22306431204813252317222219292166.70727005963130748
22 × 7 × 26687 × 36141143
2016-01-0626687361411436.62070.19010.3506

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-03-27ANONYMOUSv4_computers204820480012--0.0010.782%
2010-10-26Oscar Östlin7501175011--0.0071.595%
2011-01-13Oscar Östlin8500016150006--0.0164.413%
2014-05-26JossManual testing113774113774--0.0111.963%
2014-09-30JossManual testing142548142548--0.0142.181%
2015-05-06Squeeky_SquirrelP4_260016000046000006--0.0385.953%
2015-11-25Alexander DubrovinManual testing10000001000000012--0.1428.101%
2016-01-06Alexander DubrovinManual testing2000000650000001222166.7070.51811.419%
2016-04-11alpertronManual testing5000001500000012---8.284%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-02-07W. Oleinikv4_computers212580.017
2016-02-23Mark RoseManual testing2582600.052
2009-01-11Sturle Sundegouache.ifi2602610.069
2012-04-20Sebastian HornbostelManual testing2612620.138
2013-12-03LaurVManual testing2622630.440
2015-03-06VictordeHollanderManual testing2632640.880
2015-03-06VictordeHollanderManual testing2642651.675
2015-10-25ramgeisManual testing2652663.350


ECM factoring results:
Total ECM effort:16.416 GHz-days
Estimated T-Level:21.757
DigitsB1CompleteFacMiss
20110003.7022.466%
25500000.35170.364%
302500000.02397.771%
3510000000.00199.893%


ECM Summary

B1B2factorcurvesGHz-days
500005000070.355
500005000000151.147
50000659182970.679
50000700000070.699
50000311301905013.54


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-26W. Oleinikv4_computers33B7355ED3F5BFB60.147
1999-06-06ANONYMOUSv4_computers38E68BC59B3DA4240.147


PRP results:
dateuseridcompidcofactorsres64
2017-09-30alpertronManual testing
120481325231722221929
F870B726EFBD4C47
2017-10-28Oliver KruseGTX-0
120481325231722221929
F870B726EFBD4C47


CERT results:
No CERT results for M2230643


P-1 factor-bounds graph:
B1 = 2000000, B2 = 65000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
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 = 160000, B2 = 4600000 (P-1 stage 2)
B1 = 85000, B2 = 1615000 (P-1 stage 2)
B1 = 160000 (P-1 stage 1)
B1 = 142548 (P-1 stage 1)
B1 = 113774 (P-1 stage 1)
B1 = 85000 (P-1 stage 1)
B1 = 75011 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
TF factor-bounds graph:
266
265
264
263
262
261
260
258
this exponent TF target: 62
TF double-checked to: 67
ECM T-Level=21.76 ~= 56-bit
250
260
270
JSON version of this page
Last modified: 2024-02-29T14:28:04+00:00