The B5SPBS24 Rally - Page 2

masser · 2008-09-11, 03:13

Quote:

Originally Posted by Flatlander

Could you please post a link to a thread that explains what you are trying to achieve here. (I'm clueless but happy. lol.

)

http://mersenneforum.org/showpost.ph...47&postcount=1

masser · 2008-09-11, 03:14

Quote:

Originally Posted by Mini-Geek

Has a prime still not been found? I think I'll run this for 48 hours or so.

When a prime is found, it will be posted here and this rally will end. Thanks for the help!

masser · 2008-09-11, 03:27

Quote:

Originally Posted by Mini-Geek

BTW you'll need the LLRnet that can run PRP tests, and the link from this forum is down. I'm using the one linked from http://www.mersenneforum.org/showthread.php?t=9911.

I did not realize the forum's link was down. I just checked and it is available now. I also added a link (on our Project Links sticky thread) to the page you listed above. Thanks!

mdettweiler · 2008-09-11, 13:47

Quote:

Originally Posted by masser

I did not realize the forum's link was down. I just checked and it is available now. I also added a link (on our Project Links sticky thread) to the page you listed above. Thanks!

Oh, and if you're using Linux, I'd recommend you get it from the link that I posted in this project's "Linux build for LLRnet client available" thread, as the original one almost always just quits with a segfault error when you start it:

http://www.mersenneforum.org/showpos...11&postcount=9

masser · 2008-09-17, 15:09

Quote:

Originally Posted by masser

Two weeks to go...

One week to go...

masser · 2008-09-21, 13:35

Quote:

Originally Posted by masser

One week to go...

Three days to go...

masser · 2008-09-23, 16:27

36 hours to go...

gd_barnes · 2008-09-24, 01:51

I'm adding a full 2.4 Ghz quad to the effort for the final ~27 hrs. After that, I'll keep another 2 cores on it for another 24 hrs.

Let's get that prime the last day!

Gary

Flatlander · 2008-09-24, 02:17

Quote:

Originally Posted by masser

...

If we do not find a Base 5 Sierpinski Prime before Sept. 24th, ...

Well it's the 24th here but I've stuck my quad on for a while.

masser · 2008-09-24, 05:20

A little less than 24 hours to go... for the curious, I'm using U.S. Central Time because of Prof. Caldwell's site. I will view the rally as a success if we submit a Sierpinski prime before Sept. 25th.

gd_barnes · 2008-09-24, 06:06

Quote:

Originally Posted by masser

A little less than 24 hours to go... for the curious, I'm using U.S. Central Time because of Prof. Caldwell's site. I will view the rally as a success if we submit a Sierpinski prime before Sept. 25th.

So if we don't find a prime, the rally will have been a failure? lol

On the contrary, you will have wiped out a large primeless stretch.

Unlike bases 3 and 7, base 5 is a very composite base and is quite stubborn to find primes on.

Examples:

For Riesel base 3, there are ZERO k's remaining for k<2.9M! For Sierp base 3, there are ZERO k's remaining for k<3.5M!! Both tested to n<100K by us with 2-3 primes from top-5000 for n>100K knocking out a few k's.

For Riesel base 7, there are only 7 k's remaining for k<1M for a test limit of n=95K.

I've concluded that the bases where b=2^q-1 are very prime bases, which frequently results in very high conjectures. Lots of k's get knocked out but there are so many k's to find primes for!

The conjectures never fail to fascinate me with their oddities!

Gary

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
My own Rally	em99010pepe	No Prime Left Behind	4	2008-12-16 23:31
Rally Sept. 5th-7th	gd_barnes	No Prime Left Behind	77	2008-11-11 03:39
The B5SPBS24 Rally	masser	Conjectures 'R Us	3	2008-09-17 15:10
Extend rally?...	gd_barnes	No Prime Left Behind	15	2008-05-26 16:12
48 hr rally	em99010pepe	Sierpinski/Riesel Base 5	19	2006-11-08 00:52

2008-09-23, 16:27	#18
masser Jul 2003 wear a mask 2·829 Posts	36 hours to go...

2008-09-24, 01:51	#19
gd_barnes May 2007 Kansas; USA 3³·5·7·11 Posts	I'm adding a full 2.4 Ghz quad to the effort for the final ~27 hrs. After that, I'll keep another 2 cores on it for another 24 hrs. Let's get that prime the last day! Gary

2008-09-24, 05:20	#21
masser Jul 2003 wear a mask 2·829 Posts	A little less than 24 hours to go... for the curious, I'm using U.S. Central Time because of Prof. Caldwell's site. I will view the rally as a success if we submit a Sierpinski prime before Sept. 25th.