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

RichD 2013-08-13 05:16

There tends to be two flavors floating around. The one I usually follow is the 1/3 GNFS rule. So this number is 155/3 or about 51.67 or a full t50 plus nearly 2/5 of t55, or another 6000 @ 11e7. We are still days, if not weeks, away from poly selection time.

Passing through
1150 @ 43e6

prgamma10 2013-08-13 06:26

GNFS 155 job takes 5-6 weeks on my computer, and a full t50 takes 9 days on the same machine.

prgamma10 2013-08-14 08:54

[QUOTE=prgamma10;349375]GNFS 155 job takes 5-6 weeks on my computer, and a full t50 takes 9 days on the same machine.[/QUOTE]
Sorry, it takes about 4 (instead of 5-6) weeks, so I use (GNFS digits [B]- 6[/B])/3 rule.

RichD 2013-08-14 14:03

This will most likely be a team sieve.

Passing through 5240 @ 43e6
(total of 6540 @ 43e6)
Switching a core to 11e7.

RichD 2013-08-14 14:11

(Didn't see the second post until now.)

[QUOTE=prgamma10;349505]... so I use (GNFS digits [B]- 6[/B])/3 rule.[/QUOTE]

Is that like a sliding scale as you get up into larger numbers?

prgamma10 2013-08-14 15:52

(English is not my first language)
[QUOTE=RichD;349529]This will most likely be a team sieve.
[/QUOTE]
It's just my opinion though.
[QUOTE=RichD;349530](Didn't see the second post until now.)
Is that like a sliding scale as you get up into larger numbers?[/QUOTE]
I use the timing from a GNFS 155 job I ran with the 64-bit siever, then divide it with four to get ECM time.
Because the 64-bit siever brings 2x speedup over its 32-bit counterpart, and each 6 digits added also mean 2x longer job, I think 6 is to be subtracted from the GNFS digits first.

RichD 2013-08-14 22:08

I understand what you doing. It looks like we are about poly ready. I'll make a request over in the Msieve thread.

Another 6285 @ 43e6 - nothing

Switching all to 11e7.

prgamma10 2013-08-15 16:31

Running P-1 @ 1e10...

prgamma10 2013-08-15 19:37

[QUOTE=prgamma10;349666]Running P-1 @ 1e10...[/QUOTE]
No factor.

RichD 2013-08-16 17:58

2500 @ 11e7 - nothing.

We got a good poly thanks to [B]firejuggler[/B] so it's time to sieve this number.

RichD 2013-08-27 16:54

c153 @ i1312
 
2 * 3^2 * 12637 * c153

-pm1 3e9 - nothing


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