20130713, 18:15  #45 
Jun 2003
3×5×107 Posts 

20130713, 18:28  #46 
May 2008
Åsane, Bergen, Norway
3×5 Posts 
That was my first test Take a look at the file attatched. 437 candidates from 15M
Speeds: ppsieve: GTX570  225M p/sec with 2 clients running (75% load) sr2sieve: slow laptop cpu  26M p/sec 1 client running 
20130713, 18:37  #47 
Jun 2003
645_{16} Posts 
I think this will be useful to avoid some PRP tests.
I think ppsieve can be made faster since the PSP k's are low weight and we can add SPH to it also. What do you guys think? Last fiddled with by Citrix on 20130713 at 18:37 
20130713, 19:28  #48 
"Victor de Hollander"
Aug 2011
the Netherlands
3^{2}·131 Posts 
I thought PPsieve was only efficient for big k ranges (like PPS on PG)?
Something to consider though, a GPU uses 100Watt or more while sieving. A SB/IV bridge/ Haswell also uses something like 100Watt. Those CPUs can complete 4 first pass tests <2 days. For the PPsieve to be efficient in terms of eliminated factors/used power the GPU has to eliminate at least 2 candidates <2 days (and thus save 2 FP tests and 2 DC tests). 
20130713, 19:42  #49  
Jun 2003
3105_{8} Posts 
Quote:


20130714, 07:29  #50  
Apr 2008
Oslo, Norway
7×31 Posts 
Quote:
Kai 

20130714, 07:34  #51 
Apr 2003
2^{2}·193 Posts 
As an info. I had to fight with my migraine this weekend.
Its much better now but I want to take it easy. So all the things I had promised for this weekend have to be moved a little bit. Sorry for the delay. 
20130714, 07:54  #52  
Jun 2003
3·5·107 Posts 
Quote:
FYI: I did some theoretical testing... if we use the SPH algorithm and only test a range of 500K (n's) (e.g. 1515.5 M) and only test 33% of all the primes in a range, we can be as fast or may be even faster than sr2sieve (in terms of rate of factors found; when comparing to sieving a 50M dat). This will definitely save some PRP tests. If some one is good at programming I am willing to help them implement SPH for PSP. It can be done both on GPU or CPU. Last fiddled with by Citrix on 20130714 at 07:58 

20130806, 22:32  #53 
Jun 2003
3×5×107 Posts 
I finally was able to get access to a GPU. Does anyone have a copy of ppsieve CUDA for windows to play with?

20130807, 10:09  #54  
May 2008
Åsane, Bergen, Norway
15_{10} Posts 
Quote:


20131001, 23:52  #55 
Jun 2003
3·5·107 Posts 
Is the PSP's stats website down? Could some one else confirm. I am having issues getting the webpage to load.

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