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-   -   Reserved for MF - Sequence 4788 (https://www.mersenneforum.org/showthread.php?t=11615)

RichD 2014-05-23 01:45

C186 @ i5232
 
The 3 is gone at index 5232. GO RYAN!!

2^4 * 11 * ... * C186

Jayder 2014-06-28 11:20

We haven't received any updates in a while. Does anybody know what amount of ECM work has been done, if any?

RichD 2014-06-30 02:35

It is still being worked.

You must realize the c186 is a monumental task.

Jayder 2014-06-30 03:10

Absolutely I do. Was just looking for an update. When you don't hear any news, it's hard to tell if it is still chugging along silently or if it has been abandoned.

RichD 2014-10-16 18:12

C186 @ i5232
 
There has been a miscommunication who or what was being performed on this sequence. As it stands now it is available for work by forum members at i5232.

2^4 * 11 * ... * C186.

In the coming days I will start ECM work around t50 or t55 not knowing what has already been done.

RichD 2014-10-18 15:24

C186
 
2000 @ 43e6 - no factor
-pm1 @ 2e10 - no factor

passing through 1300 @ 11e7

RichD 2014-10-22 03:05

C186
 
passing through 7400 @ 11e7.

RichD 2014-10-24 23:03

C186
 
8100 @ 11e7 - no factor.

passing through 2000 @ 26e7

Dubslow 2014-10-25 09:35

I'll run some curves -- maybe around 425e6? (t60 is 260e6, t65 is 850e6)

VBCurtis 2014-10-25 17:05

[QUOTE=Dubslow;386045]I'll run some curves -- maybe around 425e6? (t60 is 260e6, t65 is 850e6)[/QUOTE]

That B1 is close to the changeover from k=6 using less memory vs k=2 using more memory.
If B2 is 4.7e12, that's k=6; try running a curve with flag -k 2 to force the higher-memory condition, and see if expected time for a t60 improves. Or you could try B1=400M, which I'm sure is k=6, and compare to B1=450M which should be k=2, and report which is best expected time to complete a t60.

I think the best choice depends on hardware architecture rather than ECM itself.

Dubslow 2014-10-25 18:22

[QUOTE=VBCurtis;386072]That B1 is close to the changeover from k=6 using less memory vs k=2 using more memory.
If B2 is 4.7e12, that's k=6; try running a curve with flag -k 2 to force the higher-memory condition, and see if expected time for a t60 improves. Or you could try B1=400M, which I'm sure is k=6, and compare to B1=450M which should be k=2, and report which is best expected time to complete a t60.

I think the best choice depends on hardware architecture rather than ECM itself.[/QUOTE]

Errr... what? You're over my head here. :smile:

I just thought I'd try something different. I'm also using yafu to drive 6 threads (simply due to familiarity and I'm not certain I have pyecm anywhere on my system (though it's quite possible)).

How does one check expected time to t<whatever> with `ecm`?


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