mersenneforum.org  

Go Back   mersenneforum.org > Great Internet Mersenne Prime Search > PrimeNet

Reply
 
Thread Tools
Old 2011-02-17, 19:16   #1
Svenie25
 
Svenie25's Avatar
 
Aug 2008
Good old Germany

3×47 Posts
Default What is work type "LL Test with no factoring"?

What is work type "LL Test with no factoring"?

Are these test with no factoring done so far? Or test with factoring, TF and P-1, done allready? And are there Doblechecks included?
Svenie25 is offline   Reply With Quote
Old 2011-02-17, 19:53   #2
mdettweiler
A Sunny Moo
 
mdettweiler's Avatar
 
Aug 2007
USA (GMT-5)

3×2,083 Posts
Default

"LL Test with no factoring" means that the server will try, if it can, to give you a test that's already had all of its prefactoring (TF and P-1) done in advance. Ideally, this would be the case for all tests assigned as LL, in which case the regular LL worktype would behave identically. However, in practice, because there's not enough people helping with P-1, most first-pass LL assignments still have P-1 and the last few bits of TF left to be done. Regular LL assignments will first finish these, and then start the actual LL if no factor is found. "LL Test with no factoring", however, will skip straight to the LL test regardless of whether there is more TF or P-1 to be done. This is rather inefficient (since if a factor could have been found by TF or P-1, a weeks-long LL test would be saved), but it is nonetheless made available to give the option to folks who, for whatever reason, don't want to do any prefactoring whatsoever even if it potentially means wasting their time on an unneeded LL test.
mdettweiler is offline   Reply With Quote
Old 2011-02-17, 20:35   #3
Svenie25
 
Svenie25's Avatar
 
Aug 2008
Good old Germany

3×47 Posts
Default

Thanks a lot for this really detailed explanation. A good reason for "LL-NF" would be using CUDALucas for example. ;)
Svenie25 is offline   Reply With Quote
Old 2011-02-17, 20:37   #4
mdettweiler
A Sunny Moo
 
mdettweiler's Avatar
 
Aug 2007
USA (GMT-5)

3·2,083 Posts
Default

Quote:
Originally Posted by Svenie25 View Post
Thanks a lot for this really detailed explanation. A good reason for "LL-NF" would be using CUDALucas for example. ;)
Indeed. Now that you mention it, I believe that was the primary reason LL-NF even exists in the first place--for CUDALucas and other programs like it (Mlucas, Glucas, MacLucasFFTW) that can do LL but not TF or P-1.
mdettweiler is offline   Reply With Quote
Old 2011-02-22, 20:08   #5
Svenie25
 
Svenie25's Avatar
 
Aug 2008
Good old Germany

3·47 Posts
Default

It would be good, if we can have this worktype at the manual assignments.
Svenie25 is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
GQQ: a "deterministic" "primality" test in O(ln n)^2 Chair Zhuang Miscellaneous Math 21 2018-03-26 22:33
Aouessare-El Haddouchi-Essaaidi "test": "if Mp has no factor, it is prime!" wildrabbitt Miscellaneous Math 11 2015-03-06 08:17
Refurb. Mac emits "Bad CPU type in executable" error ewmayer Hardware 15 2014-08-11 22:03
"factoring" vs "factorizing" ixfd64 Factoring 4 2012-10-16 04:07
P-1 B1/B2 selection with "Test=" vs "Pfactor=" James Heinrich Software 2 2005-03-19 21:58

All times are UTC. The time now is 15:17.

Thu Jul 9 15:17:29 UTC 2020 up 106 days, 12:50, 1 user, load averages: 1.69, 1.62, 1.53

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.