[QUOTE=chalsall;507198]Yeah, it would be nice to finish the DCTF'ing work, once and for all...

Towards that goal, could I please ask those who are currently LLTF'ing to lower levels (read: 73 or 74 "bits") to consider doing a bit of DCTF'ing for a while? It should only take a few months to clear out 58M and 59M to 74. Note that this is still "economically optimal" for any nVidia GPU in the [URL="https://www.mersenne.ca/cudalucas.php?model=706"]GTX 10xx class[/URL] or better.

Once this is done we can consider doing 57M and possibly 56M. Then DCTF should be done for good (unless and until, of course, 20xx GPUs become a larger percentage of the "fleet"; damn those beasts are good at TF'ing!).

Entirely up to each individual participant, of course. It's your kit / time / electrons / money. Do whatever rocks your world.... :smile:[/QUOTE]

Should we include those in the 66-69M range not yet at 75 bits?

[QUOTE=petrw1;507325]Should we include those in the 66-69M range not yet at 75 bits?[/QUOTE]

I /could/ bring them in after everything below 60M is TF'ed "optimally" if people are interested, but please note that only for a [URL="https://www.mersenne.ca/cudalucas.php?model=745"]20xx class card[/URL] does that "make sense" (hover over the yellow line at the 68M point)....

[QUOTE=chalsall;507327]I /could/ bring them in after everything below 60M is TF'ed "optimally" if people are interested, but please note that only for a [URL="https://www.mersenne.ca/cudalucas.php?model=745"]20xx class card[/URL] does that "make sense" (hover over the yellow line at the 68M point)....[/QUOTE]

...that's me :smile:

[QUOTE=ET_;507331]...that's me :smile:[/QUOTE]

Sigh... At this rate we're *never* going to finish DCTF... :cry: First we had to go at it again because George and Oliver implemented sieving on the GPU, which bumped up the economic cross-over points, and now nVidia have released a new class of GPU which chews through TF'ing like a hot knife through butter!!!

OK, let's talk about this...

First of all, how many GPU72 participants have (or plan to purchase) a "compute V7.5" class card?

Second, how many want to do DCTF'ing? For a [URL="https://www.mersenne.ca/cudalucas.php?model=745"]2080 Ti[/URL], for example, it still "makes sense" to TF to 75 "bits" all the way down at 51M and upwards (at 55M it is clearly optimal; below it's borderline).

There is always the issue of balancing what is "optimal" vs. what is "achievable". What I would propose is we first clear out below 60M to 74 bits, and then perhaps work from 55M and up to 75.

Thoughts?

[QUOTE=chalsall;507333]Sigh... At this rate we're *never* going to finish DCTF... :cry: First we had to go at it again because George and Oliver implemented sieving on the GPU, which bumped up the economic cross-over points, and now nVidia have released a new class of GPU which chews through TF'ing like a hot knife through butter!!!
[/QUOTE]

I am running my card at half speed right now, with mmff on the other half, and had a backlog of 90M exponents to do. I can easily turn all cores to 5xM

Anyway, just let me know what do you prefer I do with my 2060.

[QUOTE=ET_;507354]Anyway, just let me know what do you prefer I do with my 2060.[/QUOTE]

Do whatever you want to do.

Unless and until there is a substantial percentage of new kit in the "fleet", it doesn't make much sense to DCTF to 75. Better to LLTF to 77.

[QUOTE=chalsall;507333]First of all, how many GPU72 participants have (or plan to purchase) a "compute V7.5" class card?[/QUOTE]

If I had money for it...

I'm trying to put two GTX 580's back in service. We're already going to higher levels than optimal for me, but I don't care too much.

I think Wayne just wants to beat me on the DCTF charts :razz:

[QUOTE=Mark Rose;507388]I'm trying to put two GTX 580's back in service.[/QUOTE]It's cause YYZ hit -20C this week, right? :rajula:

[QUOTE=James Heinrich;507392]It's cause YYZ hit -20C this week, right? :rajula:[/QUOTE]

Naw, I just have free electricity. One died, and the other has been overheating, so I'm going to try replacing the thermal compound and thermal pads of both and see where I get. The other two are still cranking away at the office.

At home, I still have to open the balcony door to cool it down inside. My CPUs and GPUs produce about 1600 watts of heat.

[QUOTE=Mark Rose;507388]If I had money for it...

I'm trying to put two GTX 580's back in service. We're already going to higher levels than optimal for me, but I don't care too much.

I think Wayne just wants to beat me on the DCTF charts :razz:[/QUOTE]

Mush little dogsled team...mush!!!!

(Because the rest of the world knows that everyone in Canada lives in an igloo and goes to work by dogsled. 😎)

[QUOTE=petrw1;507408]and goes to work by dogsled[/QUOTE]Come on, we're more modern than that, we use snowmobiles (or snowmachines, depending what part of the bush you're from) to get around these days. :smile:

[SIZE="1"](said only mostly in jest, I've lived in a number of northontario towns where the winter road traffic is about 50:50 Skidoo & F-150)[/SIZE]