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Forum: XYYXF Project 2022-11-25, 02:25
Replies: 599
Views: 144,142
Posted By pxp
Hopefully I have fixed it.

Hopefully I have fixed it.
Forum: XYYXF Project 2022-11-07, 23:56
Replies: 599
Views: 144,142
Posted By pxp
No. Back in March I created a dictionary of...

No. Back in March I created a dictionary of Leyland (x,y) pairs from (999999,10) to (1000999,10), sorted by magnitude and preceded by its Leyland-number index (21588818851 to 21628375832). So I can...
Forum: XYYXF Project 2022-09-13, 15:28
Replies: 599
Views: 144,142
Posted By pxp
Never mind. My reproduction here shows that they...

Never mind. My reproduction here shows that they are likely the points (currently 37) discovered in 2022.
Forum: XYYXF Project 2022-09-13, 05:31
Replies: 599
Views: 144,142
Posted By pxp
The chart looks good. Why are some of the points...

The chart looks good. Why are some of the points orange?
Forum: XYYXF Project 2022-08-19, 08:44
Replies: 599
Views: 144,142
Posted By pxp
All of the gaps in my table...

All of the gaps in my table (http://chesswanks.com/num/a094133.txt) are just as you see them. That is from 150000 decimal digits to 300000 decimal digits and greater than 305000 decimal digits, with...
Forum: XYYXF Project 2022-08-17, 22:49
Replies: 599
Views: 144,142
Posted By pxp
That is essentially correct. But I will point out...

That is essentially correct. But I will point out that this doesn't prevent people from finding and contributing new Leyland primes. So far this calendar year there have been 36 new Leyland primes...
Forum: XYYXF Project 2022-08-17, 08:31
Replies: 599
Views: 144,142
Posted By pxp
The largest Leyland number in your range is 86021...

The largest Leyland number in your range is 86021 decimal digits. It has been claimed that all Leyland primes smaller than 150000 decimal digits are known. See my table of Leyland primes here...
Forum: XYYXF Project 2022-07-20, 22:11
Replies: 599
Views: 144,142
Posted By pxp
That took factordb 17 days to verify!

That took factordb 17 days to verify!
Forum: XYYXF Project 2022-07-05, 23:22
Replies: 599
Views: 144,142
Posted By pxp
Gaps in my current table generally represent...

Gaps in my current table generally represent untested numbers. However, in this instance I will have finished looking at candidates up to 386700 digits by next week, so far without a find. I had no...
Forum: XYYXF Project 2022-07-02, 23:08
Replies: 599
Views: 144,142
Posted By pxp
The story is that these are entries that are P in...

The story is that these are entries that are P in factordb. The remaining exception is #715 (http://factordb.com/index.php?id=1100000000213085881) (indicated by a K) which was proven prime a long...
Forum: XYYXF Project 2022-07-02, 22:50
Replies: 599
Views: 144,142
Posted By pxp
For the historically curious, my 2015 table...

For the historically curious, my 2015 table looked like this (http://chesswanks.com/num/a094133'.txt). I had at this point checked all Leyland numbers smaller than 43413 digits, as indicated by the...
Forum: XYYXF Project 2022-07-01, 23:11
Replies: 599
Views: 144,142
Posted By pxp
I had mentioned that I believe that all Leyland...

I had mentioned that I believe that all Leyland primes/PRPs less than 150000 digits are known. This implies that all (x,y) for x<33180 are known.
Forum: XYYXF Project 2022-07-01, 21:59
Replies: 599
Views: 144,142
Posted By pxp
All of my data has had a table...

All of my data has had a table (http://chesswanks.com/num/a094133.txt) since April 2015 and I've posted the link here many times, most recently earlier today (my post at the top of Page 50). For...
Forum: XYYXF Project 2022-07-01, 19:53
Replies: 599
Views: 144,142
Posted By pxp
Was this directed at me? If so, what do you mean...

Was this directed at me? If so, what do you mean by "the work that has been done" and by "dump"?
Forum: XYYXF Project 2022-07-01, 18:57
Replies: 599
Views: 144,142
Posted By pxp
There hasn't been much of any coordination since...

There hasn't been much of any coordination since Andrey Kulsha abandoned (in early 2017) his moderation of the project. To be fair, I don't think that by then there was a lot of activity. Kulsha had...
Forum: XYYXF Project 2022-07-01, 15:40
Replies: 599
Views: 144,142
Posted By pxp
For individuals wishing to find Leyland PRPs that...

For individuals wishing to find Leyland PRPs that are not already known, let me state first of all that I can be of no help in the programming aspect of it. Secondly, it is my personal belief that...
Forum: XYYXF Project 2022-06-28, 21:59
Replies: 599
Views: 144,142
Posted By pxp
Just a couple of observations from my Mac-centric...

Just a couple of observations from my Mac-centric perspective. First, for my iMacs I've always been very generous with my RAM, making sure of course that it is purchased from a seller other than...
Forum: XYYXF Project 2022-05-31, 19:15
Replies: 57
Views: 18,695
Posted By pxp
I've just rediscovered on old document of mine...

I've just rediscovered on old document of mine wherein I had noted (at the time) 25 proven-prime listings in Kulsha's database that were still PRP in factordb. Going through them, I note that now all...
Forum: XYYXF Project 2022-05-31, 18:06
Replies: 599
Views: 144,142
Posted By pxp
715 38951950 30008 (8656,2929) Anatoly...

715 38951950 30008 (8656,2929) Anatoly Selevich ~Nov 2007 P

I have just now changed this line to:

715 38951950 30008 (8656,2929) Anatoly Selevich Dec 2007 P
...
Forum: XYYXF Project 2022-05-27, 10:41
Replies: 599
Views: 144,142
Posted By pxp
Well done! The Leyland-number index is correct. I...

Well done! The Leyland-number index is correct. I have a dictionary of Leyland (x,y) pairs from (999999,10) to (1000999,10), sorted by magnitude and preceded by its Leyland-number index (21588818851...
Forum: XYYXF Project 2022-05-27, 00:29
Replies: 57
Views: 18,695
Posted By pxp
Just beyond that is Selevich's L(8656,2929),...

Just beyond that is Selevich's L(8656,2929), which was proven "by an implementation of a version of Mihailescu's CIDE (https://www.mersenneforum.org/showthread.php?t=17554)". It is still PRP in...
Forum: XYYXF Project 2022-05-16, 14:10
Replies: 57
Views: 18,695
Posted By pxp
Good stuff! In my masterlist...

Good stuff! In my masterlist (http://chesswanks.com/num/a094133.txt), I've used "P" in a final column for "proven". I'll add the designation "-" for "apparently reserved" and "*" for "waiting on...
Forum: XYYXF Project 2022-05-14, 13:53
Replies: 57
Views: 18,695
Posted By pxp
Looking forward to seeing these resolved in...

Looking forward to seeing these resolved in factordb. Is anyone doing L(3522,851) or L(3896,579)? Next ones up are:

L(3502,1271)
L(3121,3070)
L(3996,539)
L(3369,1766)
L(5488,99)
...
Forum: XYYXF Project 2022-05-09, 10:08
Replies: 599
Views: 144,142
Posted By pxp
I have now finished testing the Leyland numbers...

I have now finished testing the Leyland numbers in the interval from L(303999,10) to L(304999,10) and have found therein 10 PRPs. That completes the fifth and final part of finding all PRPs in the...
Forum: XYYXF Project 2022-05-08, 21:19
Replies: 599
Views: 144,142
Posted By pxp
Not as far as I know. Go for it!

Not as far as I know. Go for it!
Showing results 1 to 25 of 235

 
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