View Single Post
Old 2021-08-24, 01:08   #290
gd_barnes
 
gd_barnes's Avatar
 
May 2007
Kansas; USA

23·1,319 Posts
Default

Reb, below are the 3 times that you could not sieve where you needed to with srsieve2 when there was a large number of k's remaining. One of these is your recent post about R546.

Quote:
Originally Posted by rebirther View Post
R358 tested to n=2.5k + sieved to 1G (2.5-10k)

265552 remain

sieved stopped at 964M because of 1 factor per 7000s+

Results emailed - Base released
Quote:
Originally Posted by rebirther View Post
S330 tested to n=2.5k + sieved to 1G (2.5-10k)

101096 remain

Results emailed - Base released

Sieving ended up at 32M after 2 runs with -t10 and -t16

Quote:
Originally Posted by rebirther View Post
R546 tested to n=2.5k + sieved to 1G (2.5-10k)

75963 remain

cant sieve higher than 715M

Results emailed - Base released
I did short multiple sieves on all of the files to see what their actual approximate sieve depth is. Here is what I found.

1. R358 is sieved to P=~964M like you stated in your post. But the file shows that it was sieved to P=694851893. Why is the file wrong? My sieves confirmed that P=~964M is correct. But the factor removal is faster than 1 per second. I don't know why you are showing one every 7000 secs.

2. S330 appears to be sieved to between P=300M and 350M somewhere. But you and the file show that it was sieved to P=32M. I'm getting ZERO factor removal at P=300M but many factors being removed per second at P=350M.

3. R546 appears to be sieved to P=1G. But you and the file show that it was sieved to P=715M. I'm getting no factor removal at various tests for P>715M including at P=990M. For additional verification I confirmed that factors were being removed at P>1G.

So I'm confused what is happening.

Below are my suggestions of what we should do. Please feel free to offer alternatives.

1. I can finish sieving R358 to P=1G.

2. For the S330 sieve depth, what you stated and what is in the file are very far off from the actual sieve depth. I feel like you should maybe start over the sieving of that one with a version of srsieve2 that you know is working properly.

3. As I stated above I will continue sieving R546 using srsieve for P=715M-1G to see if there are any missing factors. That effort will be complete in ~4 hours from this post. I do not expect to find any factors. If none are found I will simply update the sieve depth in the file.

I hope that future versions of srsieve2 are able to handle large numbers of k's remaining. Perhaps srsieve is better suited for such bases.

Last fiddled with by gd_barnes on 2021-08-24 at 01:12
gd_barnes is offline   Reply With Quote