News - Page 2

gd_barnes · 2008-01-17, 07:14

We already had our 2nd top-5000 prime today. It is 13438*16^98815+1. Way to go tcadigan!

In other news, Geoff has completed Sierp base 6 to n=30K and the remaining 57 k's are ready for reservation on the pages.

I think I may take a poll on what base people think would be good to test for team drive #3 but I think Sierp base 6 looks like a good choice. There are not too few k's, not too many k's, not too high of a base that takes a long time to test, etc. It will be about a month before that would get started.

Gary

gd_barnes · 2008-01-17, 08:22

I have added instructions on submitting top-5000 primes in the 'Report primes here' thread first post.

Gary

gd_barnes · 2008-01-21, 20:59

In case you haven't seen it, come check out the new 'No prime left behind' project that is a subforum in 'Other Projects' here.

Sieved files already provided for all searches of top-5000 Riesel primes for low k-values!

Gary

gd_barnes · 2008-01-24, 08:10

Michaf astutely realized after a small amount of testing that Riesel base 24 has a partial covering set of algebraic factors for all k=m^2 that combines with a trivial factor of 5 to make a full covering set as follows:

On all even n's where k=m^2 and n=2*q, it factors to (m*24^q+1)*(m*24^q-1).

On all odd n's, there is simply a trivial factor of 5.

Therefore, all k=m^2 are eliminated from consideration for Riesel base 24. Nicely done as usual Michaf!

The algebraic factors will be reflected on the web pages shortly.

Gary

gd_barnes · 2008-01-24, 11:06

I have added the Liskovets-Gallot conjectures as a subproject for Conjectures 'R Us and updated the web pages accordingly.

They are shown on the web pages as 'Base 2 even-n' and 'Base 2 odd-n'.

gd_barnes · 2008-01-25, 17:17

See Anon's thread about 2 new LLRnet servers that have been set up for CRUS.

If you have a machine that is connected to the internet for a large portion of each day, it's an excellent way to do automated LLR testing without messing with downloading or copying files. Better yet, you don't have to worry about it running out of work in the middle of the night!

Gary

kar_bon · 2008-01-25, 18:02

that's not quite correct: the client don't have to be online all the day. there's a parameter to be set for the number of test you want. the client get them from the server and make his work. when completed, the client is idle and the results will be send to the server next online-time and new work will be loaded.
i made a note to anon to change the anouncement.

karsten

gd_barnes · 2008-01-25, 19:56

Quote:

Originally Posted by kar_bon

that's not quite correct: the client don't have to be online all the day. there's a parameter to be set for the number of test you want. the client get them from the server and make his work. when completed, the client is idle and the results will be send to the server next online-time and new work will be loaded.
i made a note to anon to change the anouncement.

karsten

Note that I said 'a large portion of the day' not 'all day'. I suppose I could leave that off entirely since people could just have their machine on/connected for 1 hour a day if they wanted to. But I'm assuming that anyone who uses LLRNet will have their machine connected for 8+ hours. Poor assumption perhaps.

mdettweiler · 2008-01-25, 20:10

Quote:

Originally Posted by gd_barnes

Note that I said 'a large portion of the day' not 'all day'. I suppose I could leave that off entirely since people could just have their machine on/connected for 1 hour a day if they wanted to. But I'm assuming that anyone who uses LLRNet will have their machine connected for 8+ hours. Poor assumption perhaps.

You are correct, for the most part. Though dial-up users can use LLRnet as long as they set their "WUCacheSize" value to a high enough number to keep them busy between connects, I would still recommend that dial-up users stick to manual LLR--especially if their computer is not guaranteed to connect to the internet at least once a day.

gd_barnes · 2008-01-27, 07:32

The Riesel base 16 team drive has restarted. Files have been posted for n=100K-140K.

For Sierp base 6, sieving is progressing for all k's and should be done Monday-Tuesday for n=30K-100K. We'll start a team drive #3 for that one around mid-week.

Gary

gd_barnes · 2008-01-30, 16:34

Team drive #3 has started for Sierp base 6. There are 56 k's remaining at n=30K with 50 k's in the team drive. Files have been posted for n=30K-70K.

Let's see what we can do with a non-power-of-2 base!

2008-01-17, 07:14	#12
gd_barnes "Gary" May 2007 Overland Park, KS 12567₁₀ Posts	Top-5000 prime #2 / Sierp base 6 ready to test We already had our 2nd top-5000 prime today. It is 13438*16^98815+1. Way to go tcadigan! In other news, Geoff has completed Sierp base 6 to n=30K and the remaining 57 k's are ready for reservation on the pages. I think I may take a poll on what base people think would be good to test for team drive #3 but I think Sierp base 6 looks like a good choice. There are not too few k's, not too many k's, not too high of a base that takes a long time to test, etc. It will be about a month before that would get started. Gary

2008-01-17, 08:22	#13
gd_barnes "Gary" May 2007 Overland Park, KS 3·59·71 Posts	Instructions on submitting big primes added I have added instructions on submitting top-5000 primes in the 'Report primes here' thread first post. Gary

2008-01-21, 20:59	#14
gd_barnes "Gary" May 2007 Overland Park, KS 3×59×71 Posts	New 'No prime left behind' project In case you haven't seen it, come check out the new 'No prime left behind' project that is a subforum in 'Other Projects' here. Sieved files already provided for all searches of top-5000 Riesel primes for low k-values! Gary Last fiddled with by gd_barnes on 2008-01-21 at 21:02

2008-01-24, 08:10	#15
gd_barnes "Gary" May 2007 Overland Park, KS 11000100010111₂ Posts	Algebraic factors for Riesel base 24 Michaf astutely realized after a small amount of testing that Riesel base 24 has a partial covering set of algebraic factors for all k=m^2 that combines with a trivial factor of 5 to make a full covering set as follows: On all even n's where k=m^2 and n=2q, it factors to (m24^q+1)(m24^q-1). On all odd n's, there is simply a trivial factor of 5. Therefore, all k=m^2 are eliminated from consideration for Riesel base 24. Nicely done as usual Michaf! The algebraic factors will be reflected on the web pages shortly. Gary

2008-01-25, 17:17	#17
gd_barnes "Gary" May 2007 Overland Park, KS 3·59·71 Posts	New LLRNet servers for connected machines See Anon's thread about 2 new LLRnet servers that have been set up for CRUS. If you have a machine that is connected to the internet for a large portion of each day, it's an excellent way to do automated LLR testing without messing with downloading or copying files. Better yet, you don't have to worry about it running out of work in the middle of the night! Gary

2008-01-24, 11:06	#16
gd_barnes "Gary" May 2007 Overland Park, KS 3×59×71 Posts	I have added the Liskovets-Gallot conjectures as a subproject for Conjectures 'R Us and updated the web pages accordingly. They are shown on the web pages as 'Base 2 even-n' and 'Base 2 odd-n'.

2008-01-25, 18:02	#18
kar_bon Mar 2006 Germany 2²×13×59 Posts	that's not quite correct: the client don't have to be online all the day. there's a parameter to be set for the number of test you want. the client get them from the server and make his work. when completed, the client is idle and the results will be send to the server next online-time and new work will be loaded. i made a note to anon to change the anouncement. karsten

2008-01-27, 07:32	#21
gd_barnes "Gary" May 2007 Overland Park, KS 12567₁₀ Posts	Riesel b16 drive 2 restarted; Sierp b6 this week The Riesel base 16 team drive has restarted. Files have been posted for n=100K-140K. For Sierp base 6, sieving is progressing for all k's and should be done Monday-Tuesday for n=30K-100K. We'll start a team drive #3 for that one around mid-week. Gary

2008-01-30, 16:34	#22
gd_barnes "Gary" May 2007 Overland Park, KS 3×59×71 Posts	Team drive #3 Team drive #3 has started for Sierp base 6. There are 56 k's remaining at n=30K with 50 k's in the team drive. Files have been posted for n=30K-70K. Let's see what we can do with a non-power-of-2 base! Last fiddled with by gd_barnes on 2008-01-30 at 16:34

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
News	gd_barnes	No Prime Left Behind	260	2023-09-26 13:10
P!=NP in the news	willmore	Computer Science & Computational Number Theory	48	2010-09-19 08:30
Other news	Cruelty	Riesel Prime Search	41	2010-03-08 18:46
The news giveth, the news taketh away...	NBtarheel_33	Hardware	17	2009-05-04 15:52
News	KEP	Riesel Base 3 Attack	4	2008-12-17 11:54