BOINC?

[pacionet]

Ok.

Gribozavr, are you sieving until 25G ?

In the future (if no primes are found, of course) should somebody start sieving
from 25G to, say, 50G with these parameters in NewPGen (correct me if wrong):

base:2
n: 195000
kmin: 25000000000
kmax: 50000000000
type: k.b^n+-1
Verify results : checked

?

[gribozavr]

Yes, to 25G = 25e12

[jasong]

I think it would be a good idea to do distributed sieving at some point. If I'm not mistaken, it can be implemented easily in NewPGen. Of course, the problem would be trying to figure out how to have different sized work-units. If it's simply a matter of text-editing, maybe someone could write a tutorial?

[Rytis]

Quick update: first BOINCLLR workunit finished successfully in 6 minutes 18 seconds under Celeron M 1.3GHz :)

925002423*2^195000-1isnotprime.LLRRes64:9EAF7A23BA5551FCTime:512.384sec.
(don't ask me why it is compressed without spaces. Who needs them anyway :D)

[victor]

Originally Posted by pacionet

Ok.

Gribozavr, are you sieving until 25G ?

In the future (if no primes are found, of course) should somebody start sieving
from 25G to, say, 50G with these parameters in NewPGen (correct me if wrong):



?

I've got a gentoo box, 805D 2.66Ghz. I could sieve this range with it :)

[pacionet]

Originally Posted by Rytis

Quick update: first BOINCLLR workunit finished successfully in 6 minutes 18 seconds under Celeron M 1.3GHz :)

925002423*2^195000-1isnotprime.LLRRes64:9EAF7A23BA5551FCTime:512.384sec.
(don't ask me why it is compressed without spaces. Who needs them anyway :D)

Uhm ... it seems to me that 512 sec is too much (usually LLR.exe takes just 100 sec).

[axn]

Originally Posted by pacionet

Uhm ... it seems to me that 512 sec is too much (usually LLR.exe takes just 100 sec).

On a Pentium M 1.4 GHz:
925002423*2^195000-1 is not prime. LLR Res64: 9EAF7A23BA5551FC Time : 329.647 sec.

BTW, 6 min 18 sec <> 512 sec

[pacionet]

Originally Posted by jasong

I think it would be a good idea to do distributed sieving at some point. If I'm not mistaken, it can be implemented easily in NewPGen. Of course, the problem would be trying to figure out how to have different sized work-units. If it's simply a matter of text-editing, maybe someone could write a tutorial?

Do you mean assigning different ranges to different users or what ?

[Rytis]

It was 6 minutes 18 seconds CPU time, and above 8 minutes wall clock time (it is still increasing when BOINC has suspended the calculations). I'm not sure if it's related to modified client or not, but I think I got pretty much the same speed with original LLR client, so I guess it does not make any difference. I'll probably implement the work generator today and we can test the speed tomorrow :)

[victor]

Sieving 25G-50G has started :

Please, enter your choice (0) : 2
Base = 2
Include even k's ? (n) : n
n = 195000
kmin = 25000000000
kmax = 50000000000
The range of k that you have specified (25000000001) is too large to fit into the bitmap, which can hold -226492416 k's.
This is not too much of a problem, as NewPGen will break this up into 0 smaller ranges and sieve each in turn up to 1 billion before combining them and sieving together.
However, you might like to consider increasing the bitmap size. Do you wish to continue? (y) : y
Type : Twin: k.b^n�1
Are you ready to start sieving ? (y) : y
CPU capabilities: CMOV: Supported. SSE2: Supported.
Using bitmap : allocating 485.0Mb of RAM...
...succeeded
Sieving from k = 25000000000 to k = 29068474880...
Sieving numbers with 58712 decimal digits

Well, I got 1Gb of RAM, but newpgen doesn't allow me to set bitmap size over 485Mb...

[KEP]

Rytis have 50 LLR results ready for testing, I've done the 50 first results, and Rytis is looking for others to help him test the 50 counter results, which should be used for validating the test. Anohter advantage by letting Rytis help us test all the ranges, and you to only manage the sieving, is that every result is double checked right away :) Go join primegrid and then do following:

Push "View or edit" in the row containing "PrimeGrid preferrences"
Choose yes in "Run Test Application"

See U all at Primegrid :) Also in case of troubles, feel free to ask questions :)