20110926, 10:02  #1 
Dec 2003
Paisley Park & Neverland
5×37 Posts 
MiniProjects
Hi folks!
I want to propose some welldefined miniprojects 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 TFattempts 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... 
20110926, 18:42  #2  
"Richard B. Woods"
Aug 2002
Wisconsin USA
7692_{10} Posts 
Quote:
There could be one set of GPUCPUTF defaults for the case of GPU performing TF and CPU performing LLs, plus another set of GPUGPUTF defaults for the case of GPUs performing both TF and LLs. (I'd recommend a different, more readilydistinguishable set of designations than mine, however.) (Yes, I know that the GPU/CPU LL speed ratio is not expected to be as large as the GPU/CPU TF speed ratio. Perhaps the GPUGPUTF defaults will be only partly or not at all different from the GPUCPUTF defaults, but until someone actually does the computations I'd rather they not be assumed to be the same.) 

20110926, 20:49  #3 
Dec 2003
Paisley Park & Neverland
5×37 Posts 
I don't want to change any server side values (such as default trial factoring depth) but would like to see
(first task)  all exponents that are to be handed out as DCs for the rest of this year should be TFed to 68 bit at least So I reserve DCs, TF them 1 bit (by GPU) and release them and do DCs with available CPUs. Does anyone want to join or does someone have another (better) idea? Feel free to say so... 
20110927, 00:33  #4 
Dec 2010
Monticello
5·359 Posts 
ckdo has me TF'ing another bit on exponents before they go to DC. It's been successful, in that I've been finding factors, and doing so more quickly than I can complete LLDCs. If you want to participate that way, PM to ckdo. There's lots more exponents than I can effectively TF; I only have about 80% of a GTX440 on standard GIMPS TF duty. (the other 20% is on operation Billiion Digits, and special requests, and the GTX480 does cudaLucas and Billion Digits, if I can ever get back to it to retrieve the results...)
Also, as I have done for daviddy in the past, anyone that thinks their LL exponent needs a few more bits of TF, let me know and I can put it in my work queue. 
20110927, 01:11  #5 
Basketry That Evening!
"Bunslow the Bold"
Jun 2011
40<A<43 89<O<88
3·29·83 Posts 
What ckdo is doing actually sounds like an excellent use of TF resources instead of extending the TF wavefront so far out in from of the LL wavefront. Any possible PrimeNet implementation?

20110927, 01:29  #6  
"Lucan"
Dec 2006
England
194A_{16} Posts 
Quote:
and in so many ways. TF is obviously best done before the first LL test, and to 4 bits more than a DC (assuming the exponent is twice as big). Endorsed by George and Jacob (to name but two), I've suggested that a few GPUS could easily TF the exponents currently being dished out for first time LL to 72 bits. Hardly any of them have been. David Last fiddled with by davieddy on 20110927 at 01:36 

20110927, 01:48  #7  
"Lucan"
Dec 2006
England
14512_{8} Posts 
Quote:
Not sure whether Eric or his ilk will have the patience for the 75 bits he did on my 47M exponent, but this simple sort of cooperation enhances the feeling of a "community project". David 

20110927, 02:25  #8  
Dec 2010
Monticello
5·359 Posts 
Quote:
As for the primenet implementation of mfaktc, that is on my desk and taking much longer than I thought it would, not because of the intrinsic difficulty of the project, but because of distractions like updating the worktodo file format, a job that pays $$, paying creditors, keeping house, and consulting for a First Robotics team. In the meantime, I just run mfaktc and turn in the results manually once a day (or in this case, after a few days). 

20110927, 03:32  #9 
"Lucan"
Dec 2006
England
6474_{10} Posts 
Pissing in the wind
Finding "small" factors of big Mersenne numbers is dirt cheap.
Why bother? Your good mate, David 
20110927, 03:38  #10 
Dec 2010
Monticello
703_{16} Posts 

20110927, 06:23  #11  
Basketry That Evening!
"Bunslow the Bold"
Jun 2011
40<A<43 89<O<88
3·29·83 Posts 
Quote:


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