Recent assignment - Page 2

kladner · 2011-08-30, 02:35

Thanks, Mini-Geek, and all other responders. I have unreserved the exponent.

One additional question to cheesehead-

Why is the assignment key something to be removed? I don't care if it is, but if that is the sort of thing NOT to post in the forum, I'd be happy to know for future reference so as not to do it again.

Christenson · 2011-08-30, 03:44

Quote:

Originally Posted by kladner

Thanks, Mini-Geek, and all other responders. I have unreserved the exponent.

One additional question to cheesehead-

Why is the assignment key something to be removed? I don't care if it is, but if that is the sort of thing NOT to post in the forum, I'd be happy to know for future reference so as not to do it again.

An assignment key is a bit like a password....it identifies the exact assignment to the server. So both it, and residues from LL tests, need obscuring to prevent someone else from claiming the work that you do.

There's that ever so slight chance that the exponent you are testing is indeed prime. In that case, it's your good name that won't go into the literature!

kladner · 2011-08-30, 04:23

Thanks for the explanation, Christenson. I guess that I'm not greatly concerned about the record books, though credit would be nice. However, the line in question would be easy to obliterate, should such a post be needed in the future.

I run GIMPS for a couple of reasons:

One is that I just like the idea of pure research. It lets my computer do something useful when I don't want anything from it.

Another is that I had a friend, long deceased, who did complex math for recreation. FFT's were something he talked about. I could sort of follow his explanations. In that sense, my GIMPS contributions are a memorial. I like to think that my friend would have appreciated it.

Mr. P-1 · 2011-08-30, 15:09

Quote:

Originally Posted by kladner

Sorry for stirring things up to no good end... Please forgive the ignorance which made it necessary.

No problem. Glad that we got it all sorted out.

Christenson · 2011-08-31, 00:23

Quote:

Originally Posted by kladner

Another is that I had a friend, long deceased, who did complex math for recreation. FFT's were something he talked about. I could sort of follow his explanations. In that sense, my GIMPS contributions are a memorial. I like to think that my friend would have appreciated it.

The contribution certainly is appreciated; explaining a bit about whats and hows and whys occasionally is simply part of the necessary price to be paid, and it is a small price indeed.

If one of your machines actually gets lucky and finds a mersenne prime, be sure to acknowledge your friend to the world by name.

Probably the best explanation of the FFT I have seen is in the book "Numerical Recipes in C"(or Fortran, or your favorite programming language), many years ago in the late 1980s/early 1990s.

kladner · 2011-08-31, 01:45

Thanks for your kind words, Christenson. I shall remember them on the outside chance that a prime falls in my lap.

I am not sure that I would be up to the explanations on FFT's. Mark had a way with words. He died at 38 in 1991 before he or I had PCs. He ran such calculations on his HP programmable calculator. I still have it somewhere.

cheesehead · 2011-09-01, 00:20

Quote:

Originally Posted by kladner

However, the line in question would be easy to obliterate, should such a post be needed in the future.

All you need obscure is the assignment key, not the whole line.

Like this:

Test=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx,52390157,69,1

or

Test=assignmentkey,52390157,69,1

or whatever such as that.

kladner · 2011-09-01, 02:10

Thanks! Got it.

Christenson · 2011-09-02, 02:23

Here's our local explanation of the FT, in case you want to work on it.
http://mersenneforum.org/showthread.php?t=120
There are some recursion relations that aren't discussed there, but are discussed in Numerical Recipes.

enjoy

kladner · 2011-09-02, 02:59

Thanks. I'll have a look. I did read some of the articles on Wikipedia on FT's and FFT's, but I don't even understand some of the notation. This would appear to be a serious problem, eh? I will try, though.

Thanks again. I do appreciate the suggestion and the link.

2011-09-01, 02:10	#19
kladner "Kieren" Jul 2011 In My Own Galaxy! 10158₁₀ Posts	assignment key Thanks! Got it.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
What does * represent on Recent Results report?	petrw1	PrimeNet	5	2018-07-09 21:14
recent cleared list	ramgeis	PrimeNet	8	2016-05-14 23:51
Recent Results/Factoring	Primeinator	PrimeNet	4	2014-10-26 00:56
Primenet Recent Results Request	garo	PrimeNet	7	2014-02-03 02:53
List of recent exponents that have been passed out	jasong	PrimeNet	5	2007-05-18 22:56

2011-08-30, 02:35	#12
kladner "Kieren" Jul 2011 In My Own Galaxy! 2×3×1,693 Posts	Thanks, Mini-Geek, and all other responders. I have unreserved the exponent. One additional question to cheesehead- Why is the assignment key something to be removed? I don't care if it is, but if that is the sort of thing NOT to post in the forum, I'd be happy to know for future reference so as not to do it again.

2011-08-30, 04:23	#14
kladner "Kieren" Jul 2011 In My Own Galaxy! 2·3·1,693 Posts	Thanks for the explanation, Christenson. I guess that I'm not greatly concerned about the record books, though credit would be nice. However, the line in question would be easy to obliterate, should such a post be needed in the future. I run GIMPS for a couple of reasons: One is that I just like the idea of pure research. It lets my computer do something useful when I don't want anything from it. Another is that I had a friend, long deceased, who did complex math for recreation. FFT's were something he talked about. I could sort of follow his explanations. In that sense, my GIMPS contributions are a memorial. I like to think that my friend would have appreciated it.

2011-08-31, 01:45	#17
kladner "Kieren" Jul 2011 In My Own Galaxy! 10158₁₀ Posts	Thanks for your kind words, Christenson. I shall remember them on the outside chance that a prime falls in my lap. I am not sure that I would be up to the explanations on FFT's. Mark had a way with words. He died at 38 in 1991 before he or I had PCs. He ran such calculations on his HP programmable calculator. I still have it somewhere.

2011-09-02, 02:23	#20
Christenson Dec 2010 Monticello 5×359 Posts	Here's our local explanation of the FT, in case you want to work on it. http://mersenneforum.org/showthread.php?t=120 There are some recursion relations that aren't discussed there, but are discussed in Numerical Recipes. enjoy

2011-09-02, 02:59	#21
kladner "Kieren" Jul 2011 In My Own Galaxy! 2×3×1,693 Posts	Thanks. I'll have a look. I did read some of the articles on Wikipedia on FT's and FFT's, but I don't even understand some of the notation. This would appear to be a serious problem, eh? I will try, though. Thanks again. I do appreciate the suggestion and the link.