S9 and general sieving discussion

[Lennart]

26T-30T complete

Doing up to 34T and shall make some test.

Lennart

[Lennart]

p=33994197134077, 121846722 p/sec, 21 factors, 99.9% done, 1560 sec/factor
sr2sieve 1.8.10 stopped: at p=34000000000000 because range is complete.
Found factors for 21 terms in 32796.706 sec. (expected about 20.50)


Lennart

[Lennart]

Originally Posted by mdettweiler

Well, everyone, we're in luck: I never actually loaded the candidates into the server yet (got swamped with other work). I'll wait until we're all sure the sieving is done before loading anything.

On another note: do we want to clear out the stats for port 1300 (I think there was some old junk in there from the previous base 2 drive) before starting the new effort? Likewise for port 1400? I can save off a "snapshot" of the stats for posterity before doing so.

Also, I fully intend to upgrade both the PRPnet servers when I load new work in them.

You can start loading s9 now when all factors are removed.

Time we save by sieving more is zero in my point of view.

Lennart

[mdettweiler]

OK, I've removed all the factors for 2T-34T from the S9 sieve file. The p=34T file is attached.

I'll be loading this file into port 1300 shortly, after I've cleared out the old stuff in there and upgraded it to 5.3.2.

[Lennart]

Originally Posted by mdettweiler

OK, I've removed all the factors for 2T-34T from the S9 sieve file. The p=34T file is attached.

I'll be loading this file into port 1300 shortly, after I've cleared out the old stuff in there and upgraded it to 5.3.2.

I am sieving this base higher and post the factors here.

Lennart

[Lennart]

Factors for 34T-40T

Lennart

[Lennart]

Originally Posted by gd_barnes

Nice work Max in getting these taken care of. Please also remove the P=34T-40T factors and send an updated file to me.

Lennart, are you done sieving S9?

I am now stickying this thread since it is ready for business.

No. It need to be sieved higer. I will soon be done with 40T-45T and i'll start 45T-50T after that.

Lennart

[Lennart]

40T-45T done

Lennart

[gd_barnes]

Originally Posted by Lennart

You can start loading s9 now when all factors are removed.

Time we save by sieving more is zero in my point of view.

Lennart

Originally Posted by Lennart

No. It need to be sieved higer. I will soon be done with 40T-45T and i'll start 45T-50T after that.

Lennart

I'm confused. The time saved by sieving is zero but it needs to be sieved higher? lol

I think that Max would not have loaded the file if it needed to be sieved further. If you are going to continue to sieve, I will remove the file from the server.

[Lennart]

Originally Posted by gd_barnes

I'm confused. The time saved by sieving is zero but it needs to be sieved higher? lol

I think that Max would not have loaded the file if it needed to be sieved further. If you are going to continue to sieve, I will remove the file from the server.

At the n-level we are at now we are ok but we do not have a optimal sieve for 1.9M.

I would not have load all at once I should have loaded 1.5M-1.6M
and continue to sieve

There is another problem also. what type of CPU shall I use when comparing time ?

If I use my AVX core I think I could stop now but if I use a time from a 3Ghz none AVX I need to sieve more.

Lennart

[gd_barnes]

Originally Posted by Lennart

At the n-level we are at now we are ok but we do not have a optimal sieve for 1.9M.

I would not have load all at once I should have loaded 1.5M-1.6M
and continue to sieve

There is another problem also. what type of CPU shall I use when comparing time ?

If I use my AVX core I think I could stop now but if I use a time from a 3Ghz none AVX I need to sieve more.

Lennart

Max has made me aware of the way PrimeGrid/PSP does sieving/testing on things at the same time, which we have not done in the past at NPLB/CRUS. From this point on, I will defer to our searchers with such experience when determining how far to sieve and when to start testing. For this, I'll defer to your knowledge on the topic. What would PrimeGrid do?

I feel that technically what we should do is use the type of machine that will be most used for sieving for a sieving rate and the type of machine that will be most used for testing in the future for a testing rate.

One question for you: As a simple example, let's say that we only loaded n=1.5M-1.6M into the server. Would you still continue to sieve n=1.5M to 2M further or would you only sieve n=1.6M-2M further?