mersenneforum.org  

Go Back   mersenneforum.org > Great Internet Mersenne Prime Search > PrimeNet > GPU to 72

Reply
 
Thread Tools
Old 2013-12-20, 06:04   #155
davieddy
 
davieddy's Avatar
 
"Lucan"
Dec 2006
England

647410 Posts
Default

Quote:
Originally Posted by kladner View Post
But irony in what direction, and to what end?
Irony for irony's sake, since Chris hasn't dared to engage in serious discussion.
With the notable exception of Aramis, Foetus Boy seems more up to speed on this topic than anyone except me, and it seems that includes George.

You will understand this mildy mathy point though:

From the point of view of the LL assignment seeker, a 69M exponent TFed to 74 will take 30% longer to test than a 60M exponent TFed to 73.
Furthermore it will be (60/69)*(74/73) = 0.88 times as likely to be prime.

That is what I meant by "unappetizing fare", and this cannot do anything but slow the assignment rate.
Remember that maximizing this rate is the sole purpose of these heady bit levels and of this debate.

D
davieddy is offline   Reply With Quote
Old 2013-12-20, 12:00   #156
kladner
 
kladner's Avatar
 
"Kieren"
Jul 2011
In My Own Galaxy!

27AE16 Posts
Default

Quote:
Originally Posted by Batalov View Post
The other way around.
Mr.Show (1995–1998)
Sopranos (1999-2007) is Mr.Show without the laugh track.
Point taken. Wow! I had no idea that The Sopranos ran that long.
kladner is offline   Reply With Quote
Old 2013-12-20, 12:43   #157
davieddy
 
davieddy's Avatar
 
"Lucan"
Dec 2006
England

2×3×13×83 Posts
Default

Quote:
Originally Posted by Prime95 View Post
And one final note. Never give out a TF assignment for a bit depth greater than recommended by James' TF vs. LL break-even chart.
What James' stepped curve shows is that GPUs should be directed entirely to TF, and that the bit level should be determined by available firepower.
However James' steps occur when the exponent increases by 21/3, and so do David's firepower-limited steps.
Now ain't that as cute as it is unsurprising?
Quote:
Thus, with unlimited GPU firepower we'd factor everything up to James' limits. With less than unlimited firepower, we'd always do the TF with the biggest payoff factor everything up to David's limits.

Heck, even davieddy might agree with such a strategy.
With the proviso that
Quote:
In practice, will implementing such a strategy make much of an impact? Are there significant numbers of exponents in the 55M-64M range factored to only 2^72 being released by PrimeNet each night?
No. But if you and Chris wish to persist tidying up mucking about behind the wavefront, the cost is raising my cut-off points.

Heck, even garo might agree with such a strategy.

davieddy is offline   Reply With Quote
Old 2013-12-20, 15:17   #158
davieddy
 
davieddy's Avatar
 
"Lucan"
Dec 2006
England

194A16 Posts
Default

Some people might like a formula for James' and my curves.

It is:
bitlevel is proportional to (TF firepower/LL firepower) * exponent3 .

END OF STORY.

BTW do you think there are any GPUs out there which don't belong to GPUto72?
davieddy is offline   Reply With Quote
Old 2013-12-20, 15:34   #159
davieddy
 
davieddy's Avatar
 
"Lucan"
Dec 2006
England

11001010010102 Posts
Default

Quote:
Originally Posted by davieddy View Post
Whoopee!

In response to the daily threat of running out of available candidates, Chris has released 300 60M and 61M candidates which (PLEASE GOD) will have been TFed only to 73.

His usual strategy is to slow down the assignment rate by bagging everything up to 68M, leaving only unappetizing fare during the peak demand.

What a ****.
Sure enough 1500 available LL assignments between 63M and 69M went AWOL between 1400 and 1500 just now.

The crowd outside are clamouring for bread, Marie Antoinette.
"Let them eat soixante-neuf M exponents."
davieddy is offline   Reply With Quote
Old 2013-12-20, 16:49   #160
chalsall
If I May
 
chalsall's Avatar
 
"Chris Halsall"
Sep 2002
Barbados

7·372 Posts
Default

Quote:
Originally Posted by davieddy View Post
I sense that one of us is resorting to bullying in indesperate[sic] fear of being exposed as a fraud.
I concur.
chalsall is offline   Reply With Quote
Old 2013-12-20, 17:01   #161
chalsall
If I May
 
chalsall's Avatar
 
"Chris Halsall"
Sep 2002
Barbados

256F16 Posts
Default

Quote:
Originally Posted by davieddy View Post
The crowd outside are clamouring for bread, Marie Antoinette.
"Let them eat soixante-neuf M exponents."
1. Everything being assigned for LL'ing has been TFed to at least 74, and P-1ed.

2. This work (read: LLing) needs to be done.

3. Over 50% of LL assignments won't get a single cycle done on it.

3.1. Over 80% of LL assignments will be "recycled" after it is abandoned.

4. Where, approximately (based on some hard math, please), is the next MP expected to be? In the 60s, or 70s?

5. We have the fire-power to pull this (read: TFing to 74) off!
chalsall is offline   Reply With Quote
Old 2013-12-20, 18:12   #162
davieddy
 
davieddy's Avatar
 
"Lucan"
Dec 2006
England

194A16 Posts
Default

Quote:
Originally Posted by chalsall View Post
1. Everything being assigned for LL'ing has been TFed to at least 74, and P-1ed.

2. This work (read: LLing) needs to be done.

3. Over 50% of LL assignments won't get a single cycle done on it.

3.1. Over 80% of LL assignments will be "recycled" after it is abandoned.

4. Where, approximately (based on some hard math, please), is the next MP expected to be? In the 60s, or 70s?

5. We have the fire-power to pull this (read: TFing to 74) off!
1. Pigs still airborne (just).
2. and LLers like to do it in ascending order.
3. No because they want a LOWER one.
4. Poisson. ~50% chance of it being <80M.
5. Read this thread you created.

SEND HER TO THE GUILLOTINE
davieddy is offline   Reply With Quote
Old 2013-12-20, 20:15   #163
owftheevil
 
owftheevil's Avatar
 
"Carl Darby"
Oct 2012
Spring Mountains, Nevada

32·5·7 Posts
Default

Actually, some of us want to do it in descending order, but we can't figure out how to count backwards from $\omega$.
owftheevil is offline   Reply With Quote
Old 2013-12-20, 20:46   #164
kladner
 
kladner's Avatar
 
"Kieren"
Jul 2011
In My Own Galaxy!

2×3×1,693 Posts
Default

Quote:
Originally Posted by owftheevil View Post
Actually, some of us want to do it in descending order, but we can't figure out how to count backwards from $\omega$.
kladner is offline   Reply With Quote
Old 2013-12-20, 22:43   #165
chalsall
If I May
 
chalsall's Avatar
 
"Chris Halsall"
Sep 2002
Barbados

256F16 Posts
Default

Quote:
Originally Posted by davieddy View Post
SEND HER TO THE GUILLOTINE
Please define "HER".
chalsall is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Stockfish game: "Move 8 poll", not "move 3.14159 discussion" MooMoo2 Other Chess Games 5 2016-10-22 01:55
Aouessare-El Haddouchi-Essaaidi "test": "if Mp has no factor, it is prime!" wildrabbitt Miscellaneous Math 11 2015-03-06 08:17
Specifing TF factor depth in "Manual Assignments"? kracker PrimeNet 2 2012-07-22 17:49
Would Minimizing "iterations between results file" may reveal "is not prime" earlier? nitai1999 Software 7 2004-08-26 18:12

All times are UTC. The time now is 14:33.

Tue May 18 14:33:06 UTC 2021 up 40 days, 9:13, 1 user, load averages: 2.72, 2.67, 2.44

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, 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.