Reserved for MF - Sequence 4788

[10metreh]

Originally Posted by bsquared

This is a little more than t45

The 1277 figure is what I got from GMP-ECM 6.2.3.

[bsquared]

Originally Posted by bsquared

This is a little more than t45, but 2000 curves at 43e6 fits well in an overnight run, so those should be done in the morning. Sorry for not jumping in sooner... it's been more hectic than usual.

- b.

Done, no factor.

[10metreh]

GNFS time?

[bsquared]

Best so far in pol51, 0 to 100

BEGIN POLY #skewness 2948934.99 norm 2.49e+21 alpha -5.63 Murphy_E 3.65e-12

I'll take 100 to 1000 next for pol51

[bsquared]

A couple more candidates from 100-1000

seq4788_2428_550-775.cand:BEGIN POLY #skewness 1138330.08 norm 6.29e+20 alpha -5.84 Murphy_E 4.39e-12
seq4788_2428_775-1000.cand:BEGIN POLY #skewness 442881.85 norm 6.93e+20 alpha -5.68 Murphy_E 4.07e-12
seq4788_2428_775-1000.cand:BEGIN POLY #skewness 829132.56 norm 6.56e+20 alpha -5.33 Murphy_E 3.97e-12

This is going fairly fast, so I'll take 1000-10000 next.

[10metreh]

Ben, do you want to do the whole poly search?

[bsquared]

Originally Posted by 10metreh

Ben, do you want to do the whole poly search?

Sure. It should be done by tomorrow.

[edit]
Although, I'm just planning on running pol51 tools... if anyone wants to chip in with msieve go ahead.

[Greebley]

Checked my run and it found nothing as well and then I stopped it. Glad we don't have to sit around for 4 days waiting for the silly run to finish. 1 processor is slow at this level

[bsquared]

After searching most of the way to 20000 and doing some test sieving, this poly was the clear winner:

BEGIN POLY #skewness 621662.95 norm 5.35e+20 alpha -6.62 Murphy_E 5.31e-12

After some light optimization, these seem to be good parameters:

n: 601570829733431775831009462944836307372504373793253939901061852870883979386533253820339653192192369661940139258976230381609972509552130495736902586517
#BEGIN POLY #skewness 621662.95 norm 5.35e+20 alpha -6.62 Murphy_E 5.31e-12
type: gnfs
skew: 621662.95 
c5: 4258980
c4: 9488946150708
c3: -5789674939355051089
c2: -3300143733276422915863786
c1: 830190772195714134449151313016
c0: 124539122235380375270696286356597376
Y1: 46807267200234637
Y0: -42657561083941041551403394433
lpbr: 28
lpba: 28
mfbr: 56
mfba: 56
rlim: 20000000
alim: 20000000
rlambda: 2.6
alambda: 2.6

With rough estimates showing 3.3 million CPU seconds (38 CPU days) and 25 million Q needed (assuming 15% duplication rate). The 29 bit case was nearly a wash, so I picked the lower FTP overhead 28 bit case.

[jrk]

Using siever 14e I assume?

Looks good. It is ready for sieving.

[bsquared]

Originally Posted by jrk

Using siever 14e I assume?

Looks good. It is ready for sieving.

Yep, sorry forgot to mention that.

We'll probably need to do Q's from say 5M to 30M or more. I'll start with 5M - 10M.

Oh, and I can do the post-processing for this one.