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-   Aliquot Sequences (https://www.mersenneforum.org/forumdisplay.php?f=90)
-   -   Reserved for MF - Sequence 3408 (https://www.mersenneforum.org/showthread.php?t=18421)

henryzz 2013-09-21 12:25

[QUOTE=EdH;353693]If NFS@Home has the c162, then I will turn my ecm efforts toward the c172. I'll probably run 2000@11e7 and then see what happens with continuous 2e8, unless my machines whine too much about the size. I'll see how they do...

My final count for the c162 is ~2630@2e8 (total)[/QUOTE]
What sort or range of memory per core do you have? It might be worth adding -maxmem to every call of ecm.py. It will slow it down a bit on your better machines but at least a higher bound should work on all your pcs.

RichD 2013-09-21 16:44

The c162 poly is still being researched. NFS@Home will get it in a few days.

EdH 2013-09-21 20:05

[QUOTE=henryzz;353694]What sort or range of memory per core do you have? It might be worth adding -maxmem to every call of ecm.py. It will slow it down a bit on your better machines but at least a higher bound should work on all your pcs.[/QUOTE]
I've got quite an array of cores/memory from 32-bit 750M through 64-bit quad core/4G. Currently I have one machine creating the command line and assigning the values. When I get a few minutes, I'm going to change the scripts so each machine can add its own options before calling the command line. It should be just as easy as adding -maxmem to the end of the current line for each machine's script.

What's a good rule for -maxmem? what the OS says is available or what the total size is?

EdH 2013-09-21 20:07

[QUOTE=RichD;353710]The c162 poly is still being researched. NFS@Home will get it in a few days.[/QUOTE]
I've moved all my ecm over to the c172, although I could move it back, if that would be any better. I suppose at this point we're looking for some good size factors for both of the numbers...

VBCurtis 2013-09-21 23:48

The 162 has had more-than-optimal ECM, no need to continue. The extra 2000 at 2e8 was polite, imo, when using external NFS resources.

The GPUers should give 5-7 days each (3 of us searching, so 15-20 GPU-days in total) in poly search, so we should have a poly Thursday or Friday.

We'd expect the C172 to take about 4x as long to NFS, so it demands roughly 4x as much ECM as the 162? Something like 15k curves at 11e7 and 20-25k at 2e8/26e7? If this is a decent estimate, no wonder you say weeks to months of ECM before this one is ready.

VBCurtis 2013-09-30 00:57

Line 1361 is now in factordb. Who picks it up next?

EdH 2013-09-30 01:54

[QUOTE=VBCurtis;354545]Line 1361 is now in factordb. Who picks it up next?[/QUOTE]
Thanks much! I think it's kind of a free-for-all now with ECM and if anyone has any success, it's mentioned so those working on it know. Someone else can chime in if there's more to it than that...

Again, thanks!

edit: i1362 is now a c125...

LaurV 2013-09-30 07:21

I didn't do any work for 3408 (neither 4788, shame on me!) but I am watching all three sequences very close (including 3366 which was somehow "my pick"). This one is easy now, but it regained the driver, so....

I think I will not get too many boulders onto my head if I would suggest to abandon it when it gets the next, higher (say C150), gnfs-able cofactor, and concentrate on 3366?

:leaving:

henryzz 2013-09-30 10:44

[QUOTE=LaurV;354573]I didn't do any work for 3408 (neither 4788, shame on me!) but I am watching all three sequences very close (including 3366 which was somehow "my pick"). This one is easy now, but it regained the driver, so....

I think I will not get too many boulders onto my head if I would suggest to abandon it when it gets the next, higher (say C150), gnfs-able cofactor, and concentrate on 3366?

:leaving:[/QUOTE]
Now the power of 3 has dropped I would agree with that.

RichD 2013-11-28 03:33

c125 @ i1368
 
2 * 3 * … * C125

I suppose not much interest in this sequence anymore.

Should it be released?

Jayder 2013-11-28 04:23

I was going to do the C125 after I finished my share of the team sieve. But if the forum is no longer interested in the sequence then I won't bother.


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