Sieving. 300<k<=1001, n=600K-1M.

[em99010pepe]

Anon,

I still have one day to finish some RS base 5 candidates then I am back to the individual k's from NPLB. So not helping here, just in case of an emergency!!! But of course in the future I'll help LLRing..lol

Carlos

[mdettweiler]

Originally Posted by Lennart

Here is the Factors for 13T-14T

/Lennart

Okay, great! Unfortunately, I don't have access to the main sieve file, nor to the 300<k<400 n=600K-1M sieve file, so I can't do the next step of combining the two, removing your factors, and computing optimal depth for the whole shabang. And since Gary's out of town right now, he probably won't have access to them either until he gets back (I think he gets back on the 21st?).

Gary, did you bring all your sieve files with you? If so, then we can get the ball rolling and continue the sieving within the next couple of days. That reminds me: we need to get that remote desktop thing set up as soon as you get back!

Lennart, if you don't already have other work lined up to keep the machines busy while waiting for more sieving to become available, we could always use some help on our nplb.ironbits.net port 400 server.

[Lennart]

Originally Posted by Anonymous

Lennart, if you don't already have other work lined up to keep the machines busy while waiting for more sieving to become available, we could always use some help on our nplb.ironbits.net port 400 server.

Sorry i have still 5T-13T only on 60% have to run them out first.

I have lot of other work todo, so i have no more comp. free.

/Lennart

[mdettweiler]

Originally Posted by Lennart

Sorry i have still 5T-13T only on 60% have to run them out first.

I have lot of other work todo, so i have no more comp. free.

/Lennart

Oh, duh duh duh! I forgot, you said you had all those lower ranges not done yet. Sorry about that.

[Lennart]

11T-13T done. Factor's sent to Anon.

5T-11T ETA 27 Aug

/Lennart

[gd_barnes]

Sorry guys. I've missed a lot of the recent posts to this thread as it is below all of the stickied threads and I hadn't scrolled down on my screen.

Carlos, as you saw, Lennart is sieving all k=400-1001 to P=14T. Once he completes that and we combine the k=300-400 file with it, I'll ask him if he thinks it will be easier for him to take the entire file up to P=~25T (or whatever optimum is) himself then to split it up into a more public effort. If not, we'll do an effort amongst a group of us. Anon and I asked Bruce and later Lennart if they could do it themselves since they've done large amounts of sieving in the past and it is easier on us admins than doing a coordinated public effort.

Besides the size issue, I'm somewhat reluctant to publically post such a huge sieved file that could possibly be used by nefarious folks for their own personal efforts 'on the side'. It'd have to be something where I send an Email to trusted folks here that contains the file.

As for sieving n=900K-1M higher, the idea was to simply sieve the entire range to a depth where candidates are being removed as fast as LLRing a candidate at 70% of the n-range, i.e. the entire range to the same depth, which is what we did for n=260K-600K. That's the optimum way IF you sieve the entire range to the same depth as we did in drives 1, 2, and 3. We can revisit that issue when Lennart is complete to P=14T. Obviously it makes a much bigger difference to break off pieces at the higher n-ranges so I suppose that should be considered.

lol


Gary

[Lennart]

All factors sent to Anon 4,92T-14T

/Lennart

Edit: Can you confirm that you got them Anon ?

[mdettweiler]

Originally Posted by Lennart

All factors sent to Anon 4,92T-14T

/Lennart

Edit: Can you confirm that you got them Anon ?

Yep, I've got 'em. I've forwarded them on to Gary, he should have the combined 300<k<1001 sieve available within the next day or two.

Anon

[gd_barnes]

Originally Posted by Lennart

All factors sent to Anon 4,92T-14T

/Lennart

Edit: Can you confirm that you got them Anon ?

That was very fast Lennart. Thank you very much.

I've now removed all factors up to P=14T, removed algebraic factors, combined the file with the k=300-400 file that is sieved to P=14T and gotten a rough estimate of the optimum sieve depth for the entire big file. Anon now has the file and I've asked him to run a couple of quick tests so that we can nail down the optimum depth more accurately.

The current estimate for optimum sieve depth is P=25T. That's based off of actual tests instead of just a rough guess like I did originally. The only issue is that the tests are on an older machine that is quite a bit faster at LLRing than sieving so I made some rough adjustments to the calculations.

Within the next day or so, we should have the file ready to start sieving again. Anon is attempting to contact Bruce and see if he is available to share part of the sieving effort to P=25T or whatever the optimum depth will be.

Thanks for your efforts.


Gary

[Brucifer]

You have a PM Gary regarding the sieving.

[gd_barnes]

Originally Posted by Brucifer

You have a PM Gary regarding the sieving.

Responded to. As I allude to in the response, we'll also need some sieving for 17-18 k's < 300.

We could have Lennart finish k=300-1001 up to P=25T (or whatever optimum is) and have you do the k's < 300 after Anon and I get it started.

Lennart, do you feel you'd have the available resources for sieving k=300-1001 for all of P=14T-25T over the next ~2 months?

Bruce, are you OK with sieving 17 or 18 k's < 300?. It should go 4-5 times as fast as with 300-350 k's. Anon and I would get it started and if you get tired of it or run short of resources, we could get it finished up.

Anon, what do you think of doing it that way?

One thing I think I'll do: The first 2 primes that I find for n>600K from these efforts, I'll split one with Lennart and one with Bruce. We greatly appreciate the huge contribution on sieving.


Gary