Reserved for MF - Sequence 4788 - Page 219

VBCurtis · 2016-02-02, 06:36

I think you're misapplying his rule of thumb. His idea is that if a t60 can be done in less time than 1/11th the expected GNFS time, the t60 is worth doing.

We can break it down digit by digit: for instance, after t55 is done t57 is a t55 worth of 260M curves. t58 is 2t55 worth of 260M curves = half a t60, etc.

The nth digit of work has 1/n chance to find a factor. t55 to t60 is roughly 5/55, which is where the 1/11 comes from.

Dubslow · 2016-02-02, 06:40

Quote:

Originally Posted by VBCurtis

I think you're misapplying his rule of thumb. His idea is that if a t60 can be done in less time than 1/11th the expected GNFS time, the t60 is worth doing.

By these estimates posted, a full t60 would take about 1850/2928*42000 = 26.5K thread hours, which is rather more than the 9K thread hours which is 1/11th of the GNFS. So we should definitely not be doing a full t60. The question then becomes how much of that t60, and simply getting as many curves as possible for the 9K thread hours seems reasonable to me, even if it's a misapplication of the rule of thumb. Unless you have any better ideas?

I barely qualify as literate in this arena, far from expert.

VBCurtis · 2016-02-02, 16:03

I like no more than 14k curves at 260M. That's 1/3rd of a t60, which gets us to about t57.

Dubslow · 2016-02-04, 07:36

Okay, I'm getting bored. I've done 3680 total curves of 14K target at 260e6. unconnected, have you completed a t55?

RichD · 2016-02-18, 23:19

Quote:

Originally Posted by Dubslow

Okay, I'm getting bored. I've done 3680 total curves of 14K target at 260e6. unconnected, have you completed a t55?

Perhaps yoyo may be interested in queuing 10,000 curves @ 26e7.

Dubslow · 2016-02-18, 23:48

Quote:

Originally Posted by RichD

Perhaps yoyo may be interested in queuing 10,000 curves @ 26e7.

We currently need 13.5K curves at 110e6 to complete t55, and 8.4K at 260e6 to complete the 14K discussed above. I'm still running the 260e6 curves here, though only on one i7-2600k.

Maybe if yoyo@home did, say... 15K@260e6?

yoyo · 2016-02-19, 09:18

Quote:

Originally Posted by Dubslow

Maybe if yoyo@home did, say... 15K@260e6?

I'll do it. They are now sent out to the Minions.

yoyo

yoyo · 2016-02-19, 20:03

Factored :D
http://www.rechenkraft.net/yoyo//y_factors_ecm.php

Dubslow · 2016-02-19, 20:04

Quote:

Originally Posted by yoyo

Factored :D
http://www.rechenkraft.net/yoyo//y_factors_ecm.php

Gah! I've run more curves in total than yoyo@home did! Not fair!

Edit: I'd done 5792@260e6 vs 4330@260e6 from yoyo@home

schickel · 2016-02-19, 20:19

Quote:

Originally Posted by yoyo

Factored :D
http://www.rechenkraft.net/yoyo//y_factors_ecm.php

Dubslow · 2016-02-19, 21:17

The C156 splits as a P38*C119, has anyone else made it this far yet or shall I just let the NFS on the C119 run?

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2016-02-02, 06:36	#2399
VBCurtis "Curtis" Feb 2005 Riverside, CA 11×443 Posts	I think you're misapplying his rule of thumb. His idea is that if a t60 can be done in less time than 1/11th the expected GNFS time, the t60 is worth doing. We can break it down digit by digit: for instance, after t55 is done t57 is a t55 worth of 260M curves. t58 is 2t55 worth of 260M curves = half a t60, etc. The nth digit of work has 1/n chance to find a factor. t55 to t60 is roughly 5/55, which is where the 1/11 comes from.

2016-02-02, 16:03	#2401
VBCurtis "Curtis" Feb 2005 Riverside, CA 11·443 Posts	I like no more than 14k curves at 260M. That's 1/3rd of a t60, which gets us to about t57.

2016-02-04, 07:36	#2402
Dubslow Basketry That Evening! "Bunslow the Bold" Jun 2011 40<A<43 -89<O<-88 3·29·83 Posts	Okay, I'm getting bored. I've done 3680 total curves of 14K target at 260e6. unconnected, have you completed a t55?

2016-02-19, 20:03	#2406
yoyo Oct 2006 Berlin, Germany 1001101111₂ Posts	Factored :D http://www.rechenkraft.net/yoyo//y_factors_ecm.php

2016-02-19, 21:17	#2409
Dubslow Basketry That Evening! "Bunslow the Bold" Jun 2011 40<A<43 -89<O<-88 3·29·83 Posts	The C156 splits as a P38*C119, has anyone else made it this far yet or shall I just let the NFS on the C119 run?