Distributed finishing for 2,1870L

[em99010pepe]

Paul,

What's the ecmnet server address for the GCW?

Best regards,

Carlos

[xilman]

Originally Posted by em99010pepe

Paul,

What's the ecmnet server address for the GCW?

Best regards,

Carlos

83.217.167.177:8194

If you connect, please do so at most only a few times a day per client. Too many clients connecting too often can really screw my ADSL line. I speak from bitter experience when someone screwed up their ecmclient.cfg and configured dozens of clients to connect every five minutes.

Thanks for the implied offer of assistance with these numbers.

Paul

[em99010pepe]

Last time I tested the client crashed several times depending on the size of the number. Tomorrow I'll point a few cores to it.

Carlos

[xilman]

I've just grabbed another 2M range of special-q and updated the sticky 1st post to match.

This time I'll be using the cabald/cabalc harness to control the sievers on my home LAN. The complete source code is in the attached tarball, as is the directory structure and config files suitable for a 6-core machine running Linux. Nothing restricts it to Linux systems, however, and it has been used on sundry versions of Windows, various Unix-alikes such as DEC OSF/1 and its successors, Sloaris, FreeBSD and MacOS.

The cabald/cabalc structure has served me well for around ten years now, most recently for the RSA-768 project. As it says in the README:

This software may be used for any purpose and the source code may be freely redistributed and re-used in other code, in part or as a whole. There is no warranty whatsoever. If it breaks anything, you get to keep the pieces.

Paul

[R.D. Silverman]

Originally Posted by R.D. Silverman

I have another 5 million relations to send. Let me know when
you want me to send you my data. I am gathering about 5M relations/week.

I am having shoulder surgery on 2/24 to remove some bone spurs
and repair my rotator cuff.

I will stop sieving next Tuesday 2/22 and send all the data collected.
It will have about another 10 million relations.

I will not yet be ready to switch to ECM, so I will set up to do
one of the homogeneous first holes.

[bdodson]

Originally Posted by R.D. Silverman

Note that Bruce just found a factor of 2,932+ that is 3 digits shorter than
his previous factor (of the same number, natch)!

With Serge's gnfs polyn the c144 factors p60*p85; so that was
p56*p59*p60*p85 on this Most Wanted first hole.

On ECM applied to 2LM's, I count fewer than 20 numbers unreserved
below C200. I'm targeting these with t55 to start (that would be the
second t55, since they're below c233), maybe a 3rd to 3t55. About
half of these are 2LM's, so you might want to start above C199, or else
target p60-p65. Hope the surgery goes well. -Bruce

(Two primes this morning, a Proth and a SophieGermain, the latter just over
2M digits; both top5000.)

[axn]

Originally Posted by bdodson

(SophieGermain, the latter just over
2M digits; both top5000.)

Considering that the current SG record is just under 80K digits, I'm assuming there's something amiss in that statement

EDIT:- You're talking about this: http://primes.utm.edu/primes/page.php?id=98494?

[bdodson]

Originally Posted by axn

Considering that the current SG record is just under 80K digits, I'm assuming there's something amiss in that statement

EDIT:- You're talking about this: http://primes.utm.edu/primes/page.php?id=98494?

Yes, I'm having trouble counting digits. That's 200K? Still too large;
just under 80K is correct. Too large for twin prime either; looks like
this was a "twin prime candidate" --- checking k*2^n -1 for which
the four numbers k*2^n-1, k*2^n+1, k*2^(n-1)-1 and k*2^(n+1)-1
have no small factors. Hmm. A top5000 prime that failed to give a
huge twin _and_ two chances at a SG. Software appears to be
David Underbakke, with page http://www.underbakke.com/primes/.

MMmmph. PrimeGrid ran the quadsieve, with 34M candidates left
to check, with probability of one or more SG 66.7% and prob of one
or more twin 42.3%. Just to be clear, the largest Twin is just over
100K (loc. cit.). So a top5000 prime with 2.5* the number of digits
of the largest SG and twice as many digits as the largest Twin. Called
a SG prime search since the primes found are somewhat more likely to
be SG than they are to be Twins.

Thanks for the clairfication (much needed, clearly) I just switched a few
32-bit machines from Proth searching to "SG" searching, without reading
the fine print. -Bruce

[bsquared]

I'll take 104-110. Should be able to get a good chunk of that done this coming weekend.


_______
94-99 lookin' good! Thanks <S>

[Batalov]

The last two test filterings are getting close to the 'cusp of convergence':

Thu Feb 17 00:00:08 2011 begin with 97388326 relations and 112987209 unique ideals
Thu Feb 17 00:06:53 2011 reduce to 34234805 relations and 38590875 ideals in 30 passes
Thu Feb 17 00:06:53 2011 max relations containing the same ideal: 101
...
Thu Feb 17 15:19:13 2011 start with 105704669 relations and 116950376 ideals
Thu Feb 17 15:21:06 2011 pass 1: found 41677055 singletons
Thu Feb 17 15:22:25 2011 pruned dataset has 64027614 relations and 66597695 large ideals
Thu Feb 17 15:22:25 2011 reading all ideals from disk
Thu Feb 17 15:22:58 2011 memory use: 2492.2 MB
Thu Feb 17 15:23:24 2011 keeping 66365826 ideals with weight <= 200, target excess is 347864
Thu Feb 17 15:23:49 2011 commencing in-memory singleton removal
Thu Feb 17 15:24:13 2011 begin with 64027614 relations and 66365826 unique ideals
Thu Feb 17 15:29:47 2011 reduce to 46064462 relations and 47326729 ideals in 19 passes
Thu Feb 17 15:29:47 2011 max relations containing the same ideal: 168
...
so maybe with Ben²'s after-weekend ~20-26M relations we'll converge, so let's target next mid-week for gathering the stones?

__________
Ecc 3:5: A time to cast away stones, and a time to gather stones together; a time to embrace, and a time to refrain from embracing.

[R.D. Silverman]

Originally Posted by Batalov

The last two test filterings are getting close to the 'cusp of convergence':

Thu Feb 17 00:00:08 2011 begin with 97388326 relations and 112987209 unique ideals
Thu Feb 17 00:06:53 2011 reduce to 34234805 relations and 38590875 ideals in 30 passes
Thu Feb 17 00:06:53 2011 max relations containing the same ideal: 101
...
Thu Feb 17 15:19:13 2011 start with 105704669 relations and 116950376 ideals
Thu Feb 17 15:21:06 2011 pass 1: found 41677055 singletons
Thu Feb 17 15:22:25 2011 pruned dataset has 64027614 relations and 66597695 large ideals
Thu Feb 17 15:22:25 2011 reading all ideals from disk
Thu Feb 17 15:22:58 2011 memory use: 2492.2 MB
Thu Feb 17 15:23:24 2011 keeping 66365826 ideals with weight <= 200, target excess is 347864
Thu Feb 17 15:23:49 2011 commencing in-memory singleton removal
Thu Feb 17 15:24:13 2011 begin with 64027614 relations and 66365826 unique ideals
Thu Feb 17 15:29:47 2011 reduce to 46064462 relations and 47326729 ideals in 19 passes
Thu Feb 17 15:29:47 2011 max relations containing the same ideal: 168
...
so maybe with Ben²'s after-weekend ~20-26M relations we'll converge, so let's target next mid-week for gathering the stones?

__________
Ecc 3:5: A time to cast away stones, and a time to gather stones together; a time to embrace, and a time to refrain from embracing.

I'll send another ~10M early next week (via snail mail)