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Forum: XYYXF Project 2020-07-23, 22:48
Replies: 394
Views: 33,056
Posted By pxp
When I first started using pfgw I played with the...

When I first started using pfgw I played with the Terminal window size until what I saw seemed to me what I thought was supposed to be seen. Terminal was wrapping the output so that all results...
Forum: XYYXF Project 2020-07-17, 19:03
Replies: 394
Views: 33,056
Posted By pxp
Trouble in paradise

In addition to running pfgw tests on the last six of those pages (which still have a day-and-a-half to go), I did pfgw tests on the first three pages on my slightly faster iMac. These have now...
Forum: XYYXF Project 2020-07-16, 22:17
Replies: 394
Views: 33,056
Posted By pxp
I will address the two points quoted. I have...

I will address the two points quoted.

I have year-month-day data for all of my own finds and these may differ from data garnered from FactorDB. I've only looked at a few of my early finds and, for...
Forum: XYYXF Project 2020-07-14, 17:59
Replies: 3
Views: 126
Posted By pxp
The largest x^y+y^x occurs for y=x which for a...

The largest x^y+y^x occurs for y=x which for a given x-range occurs for the largest x in that range. Thus, the largest Leyland number up to x=13000 is 2*13000^13000, which has 53482 decimal digits....
Forum: XYYXF Project 2020-07-11, 09:43
Replies: 394
Views: 33,056
Posted By pxp
I have examined all Leyland numbers in the four...

I have examined all Leyland numbers in the four gaps between L(32160,329) <80954>, #1565, and L(40495,114) <83295> and found 37 new primes. That makes L(40495,114) #1606 and advances the index to...
Forum: XYYXF Project 2020-07-10, 15:24
Replies: 394
Views: 33,056
Posted By pxp
Sorting Leyland numbers by digit-length — more...

Sorting Leyland numbers by digit-length — more properly, by absolute magnitude — has been my obsession from the get-go. Mark hacked the existing program to accommodate any Leyland-number input file,...
Forum: XYYXF Project 2020-07-06, 12:45
Replies: 394
Views: 33,056
Posted By pxp
There are now 45 sieved pages available for...

There are now 45 sieved pages available for Leyland prime candidates larger than L(328574,15), running from 386434 to 386478 decimal digits. Just replace the number in the URL with the number of...
Forum: XYYXF Project 2020-07-03, 17:20
Replies: 394
Views: 33,056
Posted By pxp
Processor time: 22549.57 sec. (1.62 sieving)...

Processor time: 22549.57 sec. (1.62 sieving) (0.99 cores)
333 terms written to xyyx.pfgw
Primes tested: 98222288. Factors found: 6870. Remaining terms: 333. Time: 22668.14 seconds.

I took...
Forum: XYYXF Project 2020-07-02, 18:08
Replies: 394
Views: 33,056
Posted By pxp
mm5:~ pxp$ cd /Users/pxp/Desktop/rogue ...

mm5:~ pxp$ cd /Users/pxp/Desktop/rogue
mm5:rogue pxp$ ./xyyxsieve -i386434.txt -p3 -P2e9
xyyxsieve v1.5, a program to find factors numbers of the form x^y+y^x
Sieve started: 3 < p < 2e9 with 7203...
Forum: XYYXF Project 2020-07-01, 23:24
Replies: 394
Views: 33,056
Posted By pxp
Adding the comment made no difference. I...

Adding the comment made no difference.

I noticed that the help file had sieve start "3" as the default, suggesting perhaps that -p2 might be an out of range argument. As a result, I reworked my...
Forum: XYYXF Project 2020-07-01, 12:38
Replies: 394
Views: 33,056
Posted By pxp
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...
Forum: XYYXF Project 2020-06-30, 23:24
Replies: 394
Views: 33,056
Posted By pxp
I think I've got a handle on the ABC format now....

I think I've got a handle on the ABC format now. But the space (or lack thereof) between the -i and the file name makes no difference to fatality.
Forum: XYYXF Project 2020-06-30, 19:44
Replies: 394
Views: 33,056
Posted By pxp
I'm not making any progress. The error appears...

I'm not making any progress. The error appears even after requesting help:

./xyyxsieve -h
xyyxsieve v1.5, a program to find factors numbers of the form x^y+y^x
-h --help prints this...
Forum: XYYXF Project 2020-06-30, 09:04
Replies: 394
Views: 33,056
Posted By pxp
I'm flying totally blind here. I have obviously...

I'm flying totally blind here. I have obviously never used xyyxsieve before and have limited experience using Terminal. The program you shared has no documentation. The only reference that I see to...
Forum: XYYXF Project 2020-06-30, 01:07
Replies: 394
Views: 33,056
Posted By pxp
I renamed my 1324 (x,y) list xyyx.in and put it...

I renamed my 1324 (x,y) list xyyx.in and put it in the same folder as xyyxsieve:

./xyyxsieve -i xyyx.in -P1e9
xyyxsieve v1.5, a program to find factors numbers of the form x^y+y^x
Fatal Error: ...
Forum: XYYXF Project 2020-06-29, 21:03
Replies: 394
Views: 33,056
Posted By pxp
I would like a ready-to-run OS X build.

I would like a ready-to-run OS X build.
Forum: XYYXF Project 2020-06-29, 17:13
Replies: 394
Views: 33,056
Posted By pxp
Is this ready? Where do I download?

Is this ready? Where do I download?
Forum: XYYXF Project 2020-06-28, 23:52
Replies: 394
Views: 33,056
Posted By pxp
Yes, please. I do have access to 32GB RAM on most...

Yes, please. I do have access to 32GB RAM on most of my machines so memory may not be that critical. Thanks for doing this.
Forum: XYYXF Project 2020-06-28, 23:48
Replies: 394
Views: 33,056
Posted By pxp
Thank you so much for explaining this. I had...

Thank you so much for explaining this. I had actually used ./ on other programs before but I use Terminal so infrequently that I forgot. So I ran this on my 2013 Mac Pro which was already running...
Forum: XYYXF Project 2020-06-28, 02:31
Replies: 394
Views: 33,056
Posted By pxp
If I can get it to run. After spending a...

If I can get it to run. After spending a considerable amount of time trying to unzip the Mac-version download (it defaulted to some really old unarchivers I had squirreled away that couldn't do it),...
Forum: XYYXF Project 2020-06-27, 14:03
Replies: 394
Views: 33,056
Posted By pxp
Did you mean (for example) my original 17632...

Did you mean (for example) my original 17632 Leyland number pairs list that I reduced to 1324 candidate terms (http://chesswanks.com/num/LLPHbdl/386434.txt)? Why not just sieve the 1324 terms?
...
Forum: XYYXF Project 2020-06-26, 18:34
Replies: 394
Views: 33,056
Posted By pxp
If this is just a matter of finding terms that I...

If this is just a matter of finding terms that I want to test, I can and have already done that in Mathematica. For example, there are only 17632 Leyland numbers greater than Serge Batalov's...
Forum: XYYXF Project 2020-06-24, 11:08
Replies: 394
Views: 33,056
Posted By pxp
The idea of using a script already makes it...

The idea of using a script already makes it unlikely that xyyxsieve would be a fit for my lack of programming skills (I've used Mathematica for 24 years and I still have to regularly look stuff up)....
Forum: XYYXF Project 2020-06-23, 22:06
Replies: 394
Views: 33,056
Posted By pxp
For me this all started in April 2015 when I...

For me this all started in April 2015 when I computed a table of the first 5000 Leyland numbers (OEIS A076980 (http://oeis.org/A076980)). At the same time I realized that I could do something similar...
Forum: XYYXF Project 2020-06-23, 12:35
Replies: 394
Views: 33,056
Posted By pxp
Andrey Kulsha's effort is a snapshot of when it...

Andrey Kulsha's effort is a snapshot of when it was last maintained (January 2017) and is unlikely to be updated. In terms of probable primes, the difference between it and my Leyland prime indexing...
Showing results 1 to 25 of 150

 
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