GPU to 72 status...

[ckdo]

Originally Posted by chalsall

But if you take a look at the overall system stats, you'll see that LLTF finds more factors / candidate than DCTF.

Statin' the bleedin' obvious, aren't we? LLTF candidates get like 3.5 bit levels of TF on average while DCTF candidates get only 1.1 bit levels on average. I'm not exactly surprised.

[chalsall]

Originally Posted by ckdo

Statin' the bleedin' obvious, aren't we? LLTF candidates get like 3.5 bit levels of TF on average while DCTF candidates get only 1.1 bit levels on average. I'm not exactly surprised.

But that's because the DCTF candidates have already been taken above where they nominally are. See Mersenne.org's Math page.

G72 is cooridinating taking all candidates to be 4 bit levels above what was nominal before GPUs entered the equation.

And, again, the project is currently well ahead of the DC wave front, while still working within the LL wave.

[chalsall]

Originally Posted by KyleAskine

If TF starts outpacing P-1 and LL, are there any thoughts to lowering the exponent limit for TF to 73?

Could you please restate your question, because as is it doesn't make sense (at least to me).

We are currently only taking candidates to 72 bits, except those above 58.52M.

Originally Posted by KyleAskine

How are we doing compared to the LL wave?

We are currently pulling ahead in the "wave", but are still working within it.

[KyleAskine]

Originally Posted by chalsall

Could you please restate your question, because as is it doesn't make sense (at least to me).

We are currently only taken candidates to 72 bits, except those above 58.52M.

When I say 'lowering the exponent limit' I mean, are there thoughts of taking exponents smaller than 58.52M to 73 instead of 72, assuming we are beating LL and P-1.

[chalsall]

Originally Posted by chalsall

Could you please restate your question, because as is it doesn't make sense (at least to me).

I'm stupid... I now understand your language.

While lowering the boundry to TF LL candidates to 73 to be below the current 58.52M limit is at least three months off, this might be considered now for DC candidates. As in, lowering the limit to take DC TF candidates to 70 to be below 29.69M.

Thoughts DCTF'ers?

[chalsall]

Originally Posted by KyleAskine

When I say 'lowering the exponent limit' I mean, are there thoughts of taking exponents smaller than 58.52M to 73 instead of 72, assuming we are beating LL and P-1.

We cross-posted...

At this point in time, while we are now pulling ahead in the LL "wave", we don't have enough firepower to take that step (yet).

Spidy is still finding, and throwing back, candidates only TFed to 71 above 55M at the moment.

[Dubslow]

Originally Posted by Spidy;http://gpu72.com/reports/overall/

Assigned:

TF

Double Check: 12,679
Lucas-Lehmer: 4,442

akjsdhf;aksdh;ckalehdckaubjsd;ka

[chalsall]

Originally Posted by Dubslow

akjsdhf;aksdh;ckalehdckaubjsd;ka

You're refering to this...

Yeah... When Giants fight, duck....

[Dubslow]

Originally Posted by chalsall

You're refering to this...

Yeah... When Giants fight, duck....

Also, check out the factors found in the last day.


It's like when you said "Do more LL!" they heard "Do no LL!"

[nucleon]

heheheh

Xyzzy and I have been at a battle for a while now on factors found metric. It went up a notch last night when I noticed Xyzzy submitting a lot of TF 2^69 results and his factors found metric shot up.

Also I noted people below us were churning out a fair number of factors too.

I went ballistic and sucked up a whack of DCTF work. I'm doing 69-71 DCTF with Stages=0 work.

I did leave some DCTF work.

I only have 1x GTX460 doing DCTF currently. But over the course of the next 7days or so, the rest of the farm will migrate to DCTF work.

Post the CUDA4.1 upgrade of mfaktc I was doing 1800GHzdays/day (ish). (That's 1x460GTX with DCTF, the rest LLTF). 5 GMT day average based on figures taken from http://www.mersenne.org/results/

Once my whole farm is fully doing DCTF, it'll be interesting to see the GHZ-days/day output.

So this current swag of work (6000ish DCTF 69-71) should be done in about 3 weeks.

-- Craig

[LaurV]

Originally Posted by ckdo

Statin' the bleedin' obvious, aren't we? LLTF candidates get like 3.5 bit levels of TF on average while DCTF candidates get only 1.1 bit levels on average. I'm not exactly surprised.

And additionally ye forget to mention that all DCTF had P-1 done, but only few of LLTF had P-1 done. For DC front the expos were already filtered, many of them were eliminated by P-1-found factors, and only the "tough" one remain into the list. That is why I said in the past there is no worth to do DCTF over 69 bits. One can find a factor every 2 days, or in the luckiest case, every day and half, but he would need only 24-26 hours to clear the exponent by doing DCLL. That is why I concentrated on LL-tests at DC front, and not DCTF.