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Search: Posts Made By: henryzz
Forum: Puzzles 2021-06-02, 12:44
Replies: 20
Views: 1,493
Posted By henryzz
Matching problem

Suppose you have n letters and n addressed envelopes that you need to match. You can find matches by pairing all letters with envelopes and a friend will tell you how many matches there are(not...
Forum: Factoring 2021-06-01, 10:28
Replies: 36
Views: 1,472
Posted By henryzz
Feed the remaining composite after small factors...

Feed the remaining composite after small factors have been removed. The polynomial can be a multiple of the number being factored and we often use that to generate better polynomials(the polynomials...
Forum: CADO-NFS 2021-05-27, 08:40
Replies: 4
Views: 361
Posted By henryzz
I am not sure how I missed that ccwrap.pl.in was...

I am not sure how I missed that ccwrap.pl.in was a broken symlink. Thanks for your help it appears that is the last one.
Forum: CADO-NFS 2021-05-26, 20:22
Replies: 4
Views: 361
Posted By henryzz
That moved the compilation further on. The error...

That moved the compilation further on. The error is now:

[ 0%] Building gf2x
Making all in lowlevel
Making all in src
Making all in .
Making all in fft
Making all in tests
[ 0%] Built...
Forum: CADO-NFS 2021-05-26, 09:05
Replies: 4
Views: 361
Posted By henryzz
Compilation issues

I am struggling to compile CADO and am getting the following error:

4
File /mnt/e/Downloads/cado-nfs-master-210526/cado-nfs-master/gf2x/toom-gpl.c is a placeholder, using an LGPL-licensed gf2x...
Forum: CADO-NFS 2021-05-19, 19:03
Replies: 52
Views: 9,169
Posted By henryzz
It might be interesting to find the best TD for...

It might be interesting to find the best TD for each number of relations. In theory, the difference should be even more pronounced than with a constant TD.
Forum: Prime Gap Searches 2021-05-09, 08:43
Replies: 37
Views: 2,812
Posted By henryzz
Are you suggesting that we search...

Are you suggesting that we search m*2347*7993#/13#?
Forum: Factoring 2021-05-06, 18:16
Replies: 957
Views: 104,672
Posted By henryzz
Congratulations for finally getting this...

Congratulations for finally getting this problematic number done.
Forum: Prime Gap Searches 2021-05-04, 14:24
Replies: 257
Sticky: Prime Gap News
Views: 56,989
Posted By henryzz
Is that two 3M+ gaps with no known boundaries or...

Is that two 3M+ gaps with no known boundaries or do you know some of the boundary primes?
Forum: GpuOwl 2021-05-02, 21:34
Replies: 2,715
Views: 273,637
Posted By henryzz
That would do it:smile:

That would do it:smile:
Forum: GpuOwl 2021-05-02, 20:56
Replies: 2,715
Views: 273,637
Posted By henryzz
I am a little surprised how much slower that is...

I am a little surprised how much slower that is than the RX 6800. Nvidia OpenCL penalty?
Forum: Prime Gap Searches 2021-05-02, 07:53
Replies: 37
Views: 2,812
Posted By henryzz
Just realized I never responded to this. I...

Just realized I never responded to this.
I think it makes sense that the average gap case would be bad. It punishes central candidates so strongly it ignores wider candidates. I would imagine for...
Forum: Prime Gap Searches 2021-04-25, 19:24
Replies: 37
Views: 2,812
Posted By henryzz
The offset is 1 mod 2, 2 mod 3, 4 mod 5 etc for...

The offset is 1 mod 2, 2 mod 3, 4 mod 5 etc for primes up to 7993
Forum: Software 2021-04-25, 15:51
Replies: 312
Views: 29,271
Posted By henryzz
I forgot it was the factor and not the composite....

I forgot it was the factor and not the composite. :down:
Forum: Software 2021-04-25, 10:55
Replies: 312
Views: 29,271
Posted By henryzz
Is there any logic behind trying to identify...

Is there any logic behind trying to identify which starting values actually do P+1? For example, if we multiply the original composite by a small prime that will be found with very small P+1 bounds...
Forum: Prime Gap Searches 2021-04-25, 10:49
Replies: 37
Views: 2,812
Posted By henryzz
Sorry, I thought I had posted that. I have added...

Sorry, I thought I had posted that. I have added a couple more attempts that I hope should be better. They optimize for gaps of 20 and 15 merit. These attempts have much fewer deviations from a CRT...
Forum: Other Mathematical Topics 2021-04-24, 21:59
Replies: 5
Views: 692
Posted By henryzz
It would be nice to see a version of table 7 with...

It would be nice to see a version of table 7 with primes removed if their branch has terminated in a future iteration(numbers should be monotone increasing in this case).

It is a shame that the...
Forum: Factoring 2021-04-21, 08:33
Replies: 32
Views: 1,492
Posted By henryzz
It should reduce the clock speed if it hits 95C....

It should reduce the clock speed if it hits 95C. I don't think you need to worry about it hitting 95C. That said I don't think I would leave it there.
It does feel like the temperature difference is...
Forum: Prime Gap Searches 2021-04-18, 11:08
Replies: 37
Views: 2,812
Posted By henryzz
I have finally had time to code swapping based on...

I have finally had time to code swapping based on probabilities of offsets being included in a gap. I have based it on the raw probabilities before accounting for offsets. I am unsure whether I need...
Forum: Miscellaneous Math 2021-04-15, 02:30
Replies: 24
Views: 769
Posted By henryzz
A test that is deterministic up to 50m is not...

A test that is deterministic up to 50m is not difficult to find. https://miller-rabin.appspot.com/ has records for this sort of thing.
Forum: NFS@Home 2021-04-14, 10:48
Replies: 140
Views: 15,811
Posted By henryzz
Shouldn't either Y1 or Y0 be negative?

Shouldn't either Y1 or Y0 be negative?
Forum: Aliquot Sequences 2021-04-13, 16:31
Replies: 1,176
Views: 115,501
Posted By henryzz
Has anyone considered whether SNFS polynomials...

Has anyone considered whether SNFS polynomials exist for s((x*y)^n)?
s(38^100)=36*38^100-2^101-19^101 for example. I can't help thinking there is SNFS polynomial for this but I can't see it.
Forum: Number Theory Discussion Group 2021-04-13, 09:55
Replies: 7
Views: 309
Posted By henryzz
https://en.m.wikipedia.org/wiki/Erd%C5%91s%E2%80%9...

https://en.m.wikipedia.org/wiki/Erd%C5%91s%E2%80%93Kac_theorem#:~:text=The%20Erd%C5%91s%E2%80%93Kac%20theorem%20means,requires%20on%20average%20three%20primes.
The average number of factors is...
Forum: Factoring 2021-04-07, 17:45
Replies: 23
Views: 1,087
Posted By henryzz
https://sourceforge.net/p/ggnfs/code/441/tree/trun...

https://sourceforge.net/p/ggnfs/code/441/tree/trunk/src/pol5/Readme-ggnfs.txt suggests pol5 also came from ``T. Kleinjung and/or Jens Franke''

This was used alongside msieve cpu polynomial...
Forum: Hardware 2021-04-07, 15:19
Replies: 19
Views: 1,901
Posted By henryzz
Did this test fit in the L3 cache? One or two...

Did this test fit in the L3 cache? One or two workers might fit better. The AVX-512 benchmark could be running into bandwidth issues. More but slower cores is definitely the efficient way to go....
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