20200629, 23:30  #364 
"Mark"
Apr 2003
Between here and the
2^{7}·3·17 Posts 

20200630, 01:07  #365 
Sep 2010
Weston, Ontario
2·103 Posts 
I renamed my 1324 (x,y) list xyyx.in and put it in the same folder as xyyxsieve:
Code:
./xyyxsieve i xyyx.in P1e9 xyyxsieve v1.5, a program to find factors numbers of the form x^y+y^x Fatal Error: Can only continue from input file Code:
Fatal Error: Unable to open input file 
20200630, 02:30  #366  
"Mark"
Apr 2003
Between here and the
2^{7}·3·17 Posts 
Quote:


20200630, 09:04  #367  
Sep 2010
Weston, Ontario
2×103 Posts 
Quote:
Code:
ABC $a^$b$c*$b^$a // Sieved to 1000193 1000 319 +1 1000 341 +1 Last fiddled with by pxp on 20200630 at 09:11 Reason: added a thought 

20200630, 09:57  #368 
Mar 2006
Germany
101101110010_{2} Posts 
So your file is like
Code:
(85085,34812) (92856,14509)  remove the "("  remove the ")"  replace the "," with " +1 " (notice the spaces) Now the file should look like this Code:
85085 +1 34812 92856 +1 14509 Code:
ABC $a^$c$b*$c^$a // Sieved to 1000193 This file now works with pfgw, try this with the sieve then. PS: Seems xyyxsieve don't like the file format, do the same with this  remove the "("  replace "," with " " (space)  replace the ")" with " +1" (notice spaces) and the first line as Code:
ABC $a^$b$c*$b^$a // Sieved to 1000193 Last fiddled with by kar_bon on 20200630 at 10:23 Reason: PS 
20200630, 12:31  #369  
"Mark"
Apr 2003
Between here and the
2^{7}·3·17 Posts 
Quote:
In your case you are not starting "from scratch" so usage isn't quite so clear. The error "Can only continue from input file" is odd. i provides the name of the file. if that file doesn't exist then you get the other error. If this happens again, I suggest you remove the space after the i and use "ixyyx.in" (for example). I think you have enough detail to get started, but if not, please reach out to me. 

20200630, 19:44  #370 
Sep 2010
Weston, Ontario
2×103 Posts 
I'm not making any progress. The error appears even after requesting help:
Code:
./xyyxsieve h xyyxsieve v1.5, a program to find factors numbers of the form x^y+y^x h help prints this help p pmin=P0 sieve start: P0 < p (default 3) P pmax=P1 sieve end: p < P1 (default 2^62) w worksize=w primes per chunk of work (default 10000) W workers=W start W workers (default 1) A applyandexit apply factors and exit (used with I) i inputterms=i input file of remaining candidates I inputfactors=I input file with factors (used with A) o outputterms=o output file of remaining candidates O outputfactors=O output file with new factors x minx=x minimum x to search X maxx=X maximum x to search y miny=y minimum y to search Y maxy=Y maximum y to search D disableavx disableavx Fatal Error: Can only continue from input file 
20200630, 20:03  #371  
"Mark"
Apr 2003
Between here and the
6528_{10} Posts 
Quote:


20200630, 23:24  #372 
Sep 2010
Weston, Ontario
2·103 Posts 

20200701, 12:38  #373 
Sep 2010
Weston, Ontario
2×103 Posts 
Largest Leyland Prime Hunt
I have replaced the previously referenced first three pages of Leyland prime candidates > L(328574,15) with versions that are now ABC format as opposed to my original (x,y) format. They are also significantly larger files as I have undone my own attempt at sieving in Mathematica since xyyxsieve will do so better/faster.
http://chesswanks.com/num/LLPHbdl/386434.txt http://chesswanks.com/num/LLPHbdl/386435.txt http://chesswanks.com/num/LLPHbdl/386436.txt the first three lines of the first page look like this: Code:
ABC $a^$b$c*$b^$a 164287 225 +1 102503 5888 +1 Every page starts out as a list of Leyland numbers. There are ~18000 such for each decimaldigits length in this range. Apparently there is a 16k line limit in ABCformatted files so I reduced this to ~11000 lines by applying GCD(x,y)=1 to the (x,y) pairs. These were then printed out as the abovementioned files. As previously shown, a smallprimes sieve will reduce the 11000 candidates to ~1300 and a deeper run to ~300. As Mark mentioned, a pfgw run of these would take about two weeks or so. Since I'm presently unable to participate because the OS X xyyxsieve created by Mark for this purpose is not cooperating, I thought I'd just put this out there as the germ of an idea for future consideration. If there is something wrong with my ABC formatting or there is something else that needs attention (like the filename ending, .txt or .in, does it matter?), please let me know. It takes very little time to regenerate the pages from scratch. 
20200701, 13:32  #374  
"Mark"
Apr 2003
Between here and the
2^{7}·3·17 Posts 
Quote:


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