Mini-Projects - Page 5

MrHappy · 2011-10-11, 18:40

28.0M - 32.0M is already at 68 bits and most exponents up to 28M are assigned for TF or DC so if 68 bits is the breakeven point we are almost done in the current DC range.

garo · 2011-10-11, 18:47

If someone else can chime in with their numbers we can be more sure of that. BTW my 40min estimate was for 24M as was the LL-DC estimate. The post above has been revised to reflect that. My guess is that 69 might be good for 28Ms but not for 25Ms. Hard numbers anyone else?

davieddy · 2011-10-11, 23:03

Read the two copious threads on this subject in the Lounge

Christenson · 2011-10-12, 03:12

A lucky number from ckdo -- another LL test no longer needed:
found 1 factor(s) for M27775613 from 2^67 to 2^68 [mfaktc 0.17 barrett79_mul32]
tf(): total time spent: 35m 24.609s

Hardware: GT440 at 55M candidates/sec, sieveprimes 28803 with one core of an AMD Phenom II x6 running 64-bit xubuntu 10.10.

I got a 38 hour run time for an LL test at 25,4xx,xxx on a GT480 I use, but will have to wait a bit to upload mersarch.txt. It was not and still is not running mfaktc again.

Others here can *beat* (or run circles around) me...

Garo, don't forget to factor in the core that is feeding pseudoprimes to mfaktc....what's your value of sieveprimes?

Dubslow · 2011-10-12, 05:38

Quote:

Originally Posted by Christenson

A lucky number from ckdo -- another LL test no longer needed:
found 1 factor(s) for M27775613 from 2^67 to 2^68 [mfaktc 0.17 barrett79_mul32]
tf(): total time spent: 35m 24.609s

Hardware: GT440 at 55M candidates/sec, sieveprimes 28803 with one core of an AMD Phenom II x6 running 64-bit xubuntu 10.10.

I got a 38 hour run time for an LL test at 25,4xx,xxx on a GT480 I use, but will have to wait a bit to upload mersarch.txt. It was not and still is not running mfaktc again.

Others here can *beat* (or run circles around) me...

Garo, don't forget to factor in the core that is feeding pseudoprimes to mfaktc....what's your value of sieveprimes?

No kidding. I can do that assignment in 13-14 minutes.

ckdo · 2011-10-12, 07:48

I do four such assignments every 22 minutes with the GPU not even saturated. Still, every contribution is valued. 101 mph...

Dubslow · 2011-10-13, 00:03

Wait, what are you using?

kladner · 2011-10-19, 20:05

If I remember a previous comment correctly, CKDO has a GTX5xx with a big number, possibly 80, filling the last two digits.

Christenson · 2011-10-19, 22:42

And I keep salivating over one of those...A GT580....but I was cheap about my GT440, only spent a hundred bucks or so, and the 580 costs probably half a grand....

kladner · 2011-10-20, 00:49

Quote:

Originally Posted by Christenson

And I keep salivating over one of those...A GT580....but I was cheap about my GT440, only spent a hundred bucks or so, and the 580 costs probably half a grand....

I feel very fortunate that I picked up a GTX460 for about a hundred (after rebate). But I do need to send the rebate stuff off, or not get the 30 bucks back.

Dubslow · 2011-11-28, 05:39

Quote:

Originally Posted by MrHappy

Hi folks!

I want to propose some well-defined mini-projects or tasks and a combined approach to finish/achieve it, some selfmade milestones... with the overall goal of speeding up GIMPS in the present or near future...
like: no DC should be handed out without TF-attempts up to the 69 bit level.
or: same with LL up to the XX bit level
but not: Let's do the 600M range up to 80 bit! (no offense! that is fun too!)

It's the same we do now, but with a team and a goal...

Thanks to chalsall, this has been implemented! Woooooooooo!

2011-10-11, 18:47	#46
garo Aug 2002 Termonfeckin, IE 2²×691 Posts	If someone else can chime in with their numbers we can be more sure of that. BTW my 40min estimate was for 24M as was the LL-DC estimate. The post above has been revised to reflect that. My guess is that 69 might be good for 28Ms but not for 25Ms. Hard numbers anyone else? Last fiddled with by garo on 2011-10-11 at 18:49

2011-10-11, 23:03	#47
davieddy "Lucan" Dec 2006 England 2×3×13×83 Posts	All of you Read the two copious threads on this subject in the Lounge

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2011-10-11, 18:40	#45
MrHappy Dec 2003 Paisley Park & Neverland 5×37 Posts	28.0M - 32.0M is already at 68 bits and most exponents up to 28M are assigned for TF or DC so if 68 bits is the breakeven point we are almost done in the current DC range.

2011-10-12, 03:12	#48
Christenson Dec 2010 Monticello 5·359 Posts	A lucky number from ckdo -- another LL test no longer needed: found 1 factor(s) for M27775613 from 2^67 to 2^68 [mfaktc 0.17 barrett79_mul32] tf(): total time spent: 35m 24.609s Hardware: GT440 at 55M candidates/sec, sieveprimes 28803 with one core of an AMD Phenom II x6 running 64-bit xubuntu 10.10. I got a 38 hour run time for an LL test at 25,4xx,xxx on a GT480 I use, but will have to wait a bit to upload mersarch.txt. It was not and still is not running mfaktc again. Others here can beat (or run circles around) me... Garo, don't forget to factor in the core that is feeding pseudoprimes to mfaktc....what's your value of sieveprimes?

2011-10-12, 07:48	#50
ckdo Dec 2007 Cleves, Germany 2·5·53 Posts	I do four such assignments every 22 minutes with the GPU not even saturated. Still, every contribution is valued. 101 mph...

2011-10-13, 00:03	#51
Dubslow Basketry That Evening! "Bunslow the Bold" Jun 2011 40<A<43 -89<O<-88 1110000110101₂ Posts	Wait, what are you using?

2011-10-19, 20:05	#52
kladner "Kieren" Jul 2011 In My Own Galaxy! 2×3×1,693 Posts	If I remember a previous comment correctly, CKDO has a GTX5xx with a big number, possibly 80, filling the last two digits.

2011-10-19, 22:42	#53
Christenson Dec 2010 Monticello 5×359 Posts	And I keep salivating over one of those...A GT580....but I was cheap about my GT440, only spent a hundred bucks or so, and the 580 costs probably half a grand....