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drummers-lowrise
1) Message boards : Number crunching : Rtx 30 series (Message 143189)
Posted 13 days ago by Ken_g6Project donor
Speaking of miner problems...

https://www.tomshardware.com/news/geforce-rtx-3080-cryptomining-frenzy-ampere

I hope these cards can be affordable.
2) Message boards : Number crunching : International Bacon Day Challenge (Message 142839)
Posted 22 days ago by Ken_g6Project donor
So, has anybody figured out if Proth20 can be used for this challenge?
3) Message boards : Number crunching : LLR on GPUs? (Message 141864)
Posted 64 days ago by Ken_g6Project donor
I'm more familiar with GFN sieve but there is a third algorithm, which is fastest than a fixed-n or fixed-k sieve.
It doesn't depend on k and check a large n range.

I consider that a fixed-N sieve. It's not really sieving in N's because it's touching every N. The performance can't be better that O(N) that way. Just like trial division isn't a sieve because it touches every number.

My algorithm for PPS Sieve is like that, but a little better because it can check some number of N's all at once. On GPU I capped that to 32 because that happened to be efficient; on CPU it can increase with log2(P/Kmax). But it's still O(N) so I still consider it a fixed-N sieve. And it's not efficient at searching one K (3, for 321) for a whole lot of N's.
4) Message boards : Number crunching : LLR on GPUs? (Message 141847)
Posted 65 days ago by Ken_g6Project donor
And is there a specific reason why there's a PPS sieve app for GPU that's very fast, but none for 321 sieve?

Sieves can be done in two different directions. For numbers of the form K*2^N+/-1, you can search a number of K's at a time, or a number of N's at a time; these are respectively known as fixed-N and fixed-K sieves.

My PPS Sieve algorithm is basically a fixed-N sieve, although it can search ~32 N's at once. (That's per GPU task, and it runs lots of GPU tasks at once.)

321 sieve is searching a part of that range, but at much higher N's, and a single K. Only a fixed-K sieve is efficient here.

I do have a few ideas about how to implement a fixed-K sieve on a GPU using Pollard Rho, but I've never developed an actual program.
5) Message boards : Number crunching : Alan Turing's Birthday Challenge (Message 141159)
Posted 88 days ago by Ken_g6Project donor
I'm missing Michael's daily challenge reports.

Me too.


Whatever happened to "I quit!"?

:)

All you have to do is automate all the repetitive parts of your job. Then you can quit. ;)
6) Message boards : Number crunching : Better multi-threading (Message 140873)
Posted 96 days ago by Ken_g6Project donor
I would say PPS Sieve on an AMD GPU needs a full core. On Nvidia it might not - check your GPU utilization.
7) Message boards : Problems and Help : Looks like my TeAm got hijacked! (Message 139270)
Posted 174 days ago by Ken_g6Project donor
Thanks, ILW8! And we're back to being TeAm AnandTech again. :)
8) Message boards : Problems and Help : Looks like my TeAm got hijacked! (Message 139263)
Posted 174 days ago by Ken_g6Project donor
On most projects we have the TeAm AnandTech Committee, or TAC, as the founder. That's an account that all the TAC members (me and Petrusbroder, and we need to get another one) have access to. That way foundership can't get lost if somebody like mrwizer leaves.

Assigning foundership to me would be fine for now. I'm also founder on Milkyway, since the TAC account doesn't seem to work for some reason.
9) Message boards : Problems and Help : Looks like my TeAm got hijacked! (Message 139252)
Posted 174 days ago by Ken_g6Project donor
https://www.primegrid.com/team_display.php?teamid=132

That used to be TeAm AnandTech, before wjy took foundership.

Anything that can be done to undo that?
10) Message boards : Number crunching : So Long, and Thanks for All the Fish (Message 138665)
Posted 201 days ago by Ken_g6Project donor
we just don't have the drive or energy anymore.

I'd consider signing up to help, but I know that feeling all too well.

Good luck in your future endeavors, and don't be a stranger!


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