20220628, 16:50  #518  
Random Account
Aug 2009
Not U. + S.A.
3×797 Posts 
Quote:


20220628, 17:48  #519 
Bamboozled!
"๐บ๐๐ท๐ท๐ญ"
May 2003
Down not across
10110101000000_{2} Posts 
That is why I drew them to people's attention. Simple representation, few clearly usable algebraic properties, observed high(ish) density of (pseudo)primes and a wide range of sizes.

20220628, 18:47  #520  
"Mark"
Apr 2003
Between here and the
6837_{10} Posts 
Quote:
When I last tested a range for all 20000 < x < 30000 and 5000 < y < 30000, I still had over 3 million terms left at 15e9 after many days of sieving. So if you consider that a GPU can do hundreds of primes at a time, one quickly sees that memory is going to be an issue. In fact the movement of data between GPU and CPU is the bottleneck. Still faster than CPU alone, but a noticeable bottleneck. I would like to try this on an Apple M1 since the CPU and GPU share memory. I have not finished the work to port to Metal as I haven't had time to work on it. 

20220628, 21:59  #521  
Sep 2010
Weston, Ontario
5×47 Posts 
Quote:


20220628, 23:50  #522  
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Aug 2009
Not U. + S.A.
4527_{8} Posts 
I have seen ABCD and similar before. It was when I was running Riesel primes for a project four years ago. It has been so long that I do not remember how to run them. I could not get OpenPFGW to accept anything I presented to it. Then, I tried the below:
Quote:
Many thanks! 

20220629, 00:53  #523  
"Mark"
Apr 2003
Between here and the
6837_{10} Posts 
Quote:


20220629, 00:55  #524  
"Mark"
Apr 2003
Between here and the
3·43·53 Posts 
Quote:
Last fiddled with by rogue on 20220629 at 00:57 

20220629, 05:59  #525  
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Aug 2009
Not U. + S.A.
3·797 Posts 
Quote:
It appears in many posts I looked at above, everyone was using fivedigit numbers. I will just run something smaller for an overnight test. Do they have something they are choosing them from? Thanks! 

20220629, 13:05  #526 
"Mark"
Apr 2003
Between here and the
3·43·53 Posts 

20220629, 14:40  #527 
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Aug 2009
Not U. + S.A.
3×797 Posts 

20220629, 16:27  #528 
"Mark"
Apr 2003
Between here and the
3·43·53 Posts 
The latest build of xyyxsievecl is in the mtsieve page. This assume you have an OpenCL compatible GPU. You might need to d/l drivers.

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