I might have delivered some bad results - Page 5

Dubslow · 2011-11-16, 23:52

@kladner: I'll probably run them myself out of the slight OCD that it seems all the nerds I know personally have.

kladner · 2011-11-17, 01:02

Quote:

Originally Posted by chalsall

No, it didn't find a factor.

You are, of course, correct. I did turn up a factor on a run from GPU to 72 in the same day. I confused the two in the subsequent comment. The No Factor result was clear in my first post.

kladner · 2011-11-17, 01:32

Quote:

Originally Posted by Dubslow

@kladner: I'll probably run them myself out of the slight OCD that it seems all the nerds I know personally have.

I understand the urge. I'm just looking to get the most benefit for the overall project out of the time I can run things.

I still have a worker running them at the moment. It's just that powering my setup through a Kill a Watt has been putting fear of the electric bill in me. It has made it clear just what portion of monthly consumption is due to the computers. And to some extent it has shown what the various Prime calculations I run add to that. I have cut back my running hours for purely economic reasons. Going into a Chicago winter, I don't mind the increase in the daytime. It keeps my corner of the room a welcome bit warmer. But I'm no longer running 24/7.

This is emphatically not a complaint against GIMPS. There are prominent warnings about increased electric consumption. That little box has just given me a concrete grasp of that increase.

Dubslow · 2011-11-17, 01:41

lololol I've been hearing reports about how we're supposed to get (among most of the US) some of the biggest storms in a long, long time. Can't wait! (And thank god I don't pay the bills yet!)

Christenson · 2011-11-17, 05:29

I'm all wet tonight...working through the thunder.... Kladner, time to find out where the heat from your PC is leaking out of the house/apartment! Also, multiply the watts by the hours per month and divide by 1,000 to get KWH/month, and figure that on your electric bill. Then figure out what the heat costs, and what part of the heat is replaced by the heat from the PC, and cost that out and subtract, and you have a good real cost of running GIMPS.

Dubslow, how many tests lie between the last factor found and the last test done by Mr Iconized?

Dubslow · 2011-11-17, 06:40

17. Can attach file for reference.

lycorn · 2011-11-17, 15:52

Quote:

Originally Posted by kladner

It's just that powering my setup through a Kill a Watt has been putting fear of the electric bill in me. It has made it clear just what portion of monthly consumption is due to the computers. And to some extent it has shown what the various Prime calculations I run add to that. I have cut back my running hours for purely economic reasons. Going into a Chicago winter, I don't mind the increase in the daytime. It keeps my corner of the room a welcome bit warmer.

That´s a good point. I have done the same, for the cost of electricity has risen very significantly in Portugal this year.
But now winter is arriving, and although our winters can´t be compared to Chicago´s (thank God...), we still need to heat the houses. So for the moment I am back running 24/7. The heat dissipated by the PC is not much, but over the hours and days it will build up a cosier atmosphere than if it were off, hence reducing the need for heating the room. Let´s view things from this perspective: the PC became a space heater and the tests for GIMPS are a byproduct. That´s the most positive attitude you can have when faced with the electric bill

...

KyleAskine · 2011-11-17, 17:57

Quote:

Originally Posted by kladner

I understand the urge. I'm just looking to get the most benefit for the overall project out of the time I can run things.

I think it is probably always more valuable to the project to run a TF that you know for a fact has not been done than one that there is a chance that it was not done correctly. Since these were factored from 70 to 71, that will be my baseline, though it doesn't matter.

Simplifed math below:

Assume x is the probability there is some factor between 70 and 71 for an LL candidate, and y is the probability the first TF was done incorrectly:

If you TF something new, the odds we eliminate a number from LL is x. If you double check the original and ignore some new unchecked number the odds we eliminate a number is x * y. Which is less than x, probably significantly so.

So I would not double check these exponents.

Hopefully that makes sense and is logically correct...

chalsall · 2011-11-17, 18:15

Quote:

Originally Posted by KyleAskine

If you TF something new, the odds we eliminate a number from LL is x. If you double check the original and ignore some new unchecked number the odds we eliminate a number is x * y. Which is less than x, probably significantly so.

Very significantly so. Particularly considering that "iconized" turned in true factors which were within the statistical expectations of the work done.

Quote:

Originally Posted by KyleAskine

Hopefully that makes sense and is logically correct...

It does and is.

Uncwilly · 2011-11-18, 01:24

Quote:

Originally Posted by lycorn

That´s a good point. I have done the same, for the cost of electricity has risen very significantly in Portugal this year.
But now winter is arriving, and although our winters can´t be compared to Chicago´s (thank God...), we still need to heat the houses.

Norway = cold + cheap hydropower = Norwegians love PC space heaters.

lycorn · 2011-11-18, 16:23

Why you mention Norway? Is it the "Somewhere you aren´t" location, by any chance?

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2011-11-16, 23:52	#45
Dubslow Basketry That Evening! "Bunslow the Bold" Jun 2011 40<A<43 -89<O<-88 1C35₁₆ Posts	@kladner: I'll probably run them myself out of the slight OCD that it seems all the nerds I know personally have.

2011-11-17, 01:41	#48
Dubslow Basketry That Evening! "Bunslow the Bold" Jun 2011 40<A<43 -89<O<-88 3·29·83 Posts	lololol I've been hearing reports about how we're supposed to get (among most of the US) some of the biggest storms in a long, long time. Can't wait! (And thank god I don't pay the bills yet!)

2011-11-17, 05:29	#49
Christenson Dec 2010 Monticello 5×359 Posts	I'm all wet tonight...working through the thunder.... Kladner, time to find out where the heat from your PC is leaking out of the house/apartment! Also, multiply the watts by the hours per month and divide by 1,000 to get KWH/month, and figure that on your electric bill. Then figure out what the heat costs, and what part of the heat is replaced by the heat from the PC, and cost that out and subtract, and you have a good real cost of running GIMPS. Dubslow, how many tests lie between the last factor found and the last test done by Mr Iconized?

2011-11-17, 06:40	#50
Dubslow Basketry That Evening! "Bunslow the Bold" Jun 2011 40<A<43 -89<O<-88 3·29·83 Posts	17. Can attach file for reference.

2011-11-18, 16:23	#55
lycorn "GIMFS" Sep 2002 Oeiras, Portugal 1473₁₀ Posts	Why you mention Norway? Is it the "Somewhere you aren´t" location, by any chance?