An Open Request for Sieve Help!

[jmblazek]

As PrimeGrid continues to add projects, more pressure is placed on the sieving aspect to keep up with growth. Therefore, PrimeGrid is in a continuous need of sievers...both manual and BOINC.

Currently, there are seven sieving efforts underway...including both BOINC and manual. Some are long term sieves like the combined Prime Sierpinski Project and Seventeen or Bust sieve. Others are shorter, like Proth Sieve, having ending dates within the next several months. However, all of them need help.

Currently, a few of the sieves have been prioritized depending on the demand of primality testing. The top three priorities are:

1. Proth Sieve - BOINC
2. 321 Sieve - Manual (manual credit/cobblestones available)
3. Prime Sierpinski Project (Seventeen or Bust) Sieve - BOINC and Manual

If anyone is interested, please see this post for more details: Calling All Sievers (http://www.primegrid.com/forum_thread.php?id=1040&nowrap=true#10604)

Thank you for your consideration.

[Danish Dynamite]

i looked at post that you referred to but way to much reading
have enabled

321 Prime Search
Prime Sierpinski Problem Sieve
Proth Prime Search

from what i can tell this is what you are wishing and/or hoping for i have currently only yhis comp on it but i will allow work for other comps shortly

Edit i believe i have 10 cores on this now

Edit 2 only selected 321 since i am having issues with other work units

[jmblazek]

i looked at post that you referred to but way to much reading
Sorry about that. Hopefully I can answer any questions you have here.


have enabled

321 Prime Search
Prime Sierpinski Problem Sieve
Proth Prime Search

from what i can tell this is what you are wishing and/or hoping for i have currently only yhis comp on it but i will allow work for other comps shortly

Edit i believe i have 10 cores on this now
10 cores, that's GREAT! However, you might want to see the following:

321 Prime Search (BOINC) - primality effort (LLR) - searching for mega primes in the form of 3*2^n+/-1. Tests use the LLR app and can range from 10-25 hours depending on CPU.
321 Sieve (Manual)- sieve effort - preparing work for the 321 Prime Search.
Proth Prime Search (BOINC) - primality effort (LLR) - searching for primes in the form of k*2^n+1. Tests use the LLR app and can range from 1-3 minutes depending on CPU.
Proth Sieve (BOINC)- sieve effort - for 64 bit Win and Linux only and enabled by request. Preparing work for the Proth Prime Search (PPS).
Prime Sierpinski Problem LLR (BOINC) - primality effort (LLR) search from primes to solve the Prime Sierpinski Problem
Prime Sierpinski Problem Sieve (BOINC)- sieve effort - preparing work for the PSP LLR.

The red listed projects above are where the focus is. It looks like the only sieve effort available for you is PSP Sieve (unless you wanted to do manual sieve work with 321 Sieve). I hope you don't mind. PSP Sieve, although 3rd in priority, is still a good place to be.

However, any LLR work is appreciated as well. :) I hope this helps. Thank you very much for your effort.

[vaughan]

John - sorry I'm confused. In the Primegrid preferences there are 9 choices.

Which one is Proth Sieve (BOINC) ?

[jmblazek]

John - sorry I'm confused. In the Primegrid preferences there are 9 choices.

Which one is Proth Sieve (BOINC) ?

Oops, I didn't realize that the name was different.

Proth Sieve = PPS Sieve (Proth Prime Search Sieve)

Also note:

This project has a very large sieve file 270MB (80MB compressed - BOINC does the on the fly, transparent to the user). Therefore, the project is regulated so we can monitor bandwidth.

Users are added by request. More information can be found here: PPS Sieve (http://www.primegrid.com/forum_thread.php?id=973&nowrap=true#9505)

You are already added.

[jmblazek]

The Prime Sierpinski Problem Sieve has entered into the 10P range. This was our "soft" goal for PrimeGrid's one year anniversary (13 October 2008). We reached it two weeks ahead of time. Congratulations everyone on this AMAZING accomplishment. For more information about the Prime Sierpinski Problem and next year's sieve goal, please see this forum post (http://www.primegrid.com/forum_thread.php?id=1068&nowrap=true#10932).

[jmblazek]

Good progress has been made towards the top 3 priorities. A summary is below:

1. Proth Sieve (p=106T) - goal, to reach a sieve depth of 500T initially and 850T long term
2. 321 Sieve (p=700T) - goal, to reach a sieve depth of 1000T initially
3. Prime Sierpinski Project (Seventeen or Bust) Sieve (p=11.1P) - goal, to reach p=25P before 13 October 2009 (2 year anniversary)

As you can see, #2 & #3 are doing quite well. However, #1 could still use some help. It's only available for 64 bit Linux and Windows. WU's are 2 to 2 1/2 hours long

If anyone is interested, please see this post for more details: Calling All Sievers (http://www.primegrid.com/forum_thread.php?id=1040&nowrap=true#10604). If you are interested specifically in Proth Sieve, please see this post: PPS Sieve (http://www.primegrid.com/forum_thread.php?id=973&nowrap=true#9505)

Thank you for your consideration.

[jmblazek]

We'd like to do a PUSH in PPS LLR to get it up to n=346,000 which is Top 5000 level in Chris Caldwell's The Largest Known Primes Database! (http://primes.utm.edu/primes/)

However, the sieve is still more important right now. We have reached the 2T/day level but really need to be at the 4T/day level. With this rate, we'd be advancing the sieve at over 100T per month. This would give us still almost a year of sieving but also allow us to push the lower levels of PPS LLR.

Therefore, PPS Sieve is STLL IN NEED of 64 bit sievers (BOINC). If you are interested, please PM me or Lennart and you'll be added to the project. If you know of anyone who might be interested, please direct them to this thread (http://www.primegrid.com/forum_thread.php?id=973).

Thank you for your help!

Basic requirements:

1. 64 bit OS only (Linux or Windows) - 64 bit apps
2. 500 MB RAM per core
3. 2+ GHZ