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-   -   Team sieve #30: c156 from 283752:i7004 (https://www.mersenneforum.org/showthread.php?t=16205)

LaurV 2011-11-04 18:26

Team sieve #30: c156 from 283752:i7004
 
In the spirit of giving everyone something to keep them busy....

283752 is currently being driven by 2^3 * 3. However, 7004 is the 16th line with the driver having the form 2^3 * 3^2; accordingly, there is a 50% chance of an escape on the next line. unconnected reported doing 1.5*t55 worth of ECM work and LaurV performed the poly search.

======================================

Got a poly after about a week. Is it (relatively) good? How good? How long the sieving will take on two cores of a core2 3Gigs? (about) Can that be taken as a "one man job?" Maybe I will give it a try....
[CODE]# Sieve with the 14e siever on the algrebraic side starting from 15M
# Target is 56M raw relations
n: 150334450606011724019777200211010468220565590046299234402254345532711750018652367487259651931850319063498312781804011647293058067263942651704486104870980321
skew: 14230655.24
c0: -520134197785689262516595081751266984241
c1: 809982347485060642501973343231813
c2: 321021768654971361269241683
c3: -4637554577292436357
c4: -1395390947346
c5: 17040
Y0: -1545689251703330366629739901868
Y1: 956597419325010283
rlim: 30000000
alim: 30000000
lpbr: 29
lpba: 29
mfbr: 58
mfba: 58
rlambda: 2.500000
alambda: 2.500000

[/CODE]

Reservations:[code]
15 - 20M schickel
20 - 25M schickel
25 - 45M bsquared
[/code]

jrk 2011-11-04 19:21

[QUOTE=LaurV;277133]Got a poly after about a week. Is it (relatively) good? How good? How long the sieving will take on two cores of a core2 3Gigs? (about) Can that be taken as a "one man job?" Maybe I will give it a try....[/QUOTE]
Yes that is a good poly. My expected murphy score for a number of this size is about 2.71e-12 and your poly is 2.81e-12, so that is good. You should use ggnfs siever 14e and sieve on the -a side starting from specialq 15M until you have gathered 56M raw relations. Sieving will take about 3 to 4 weeks on your two cores, and the matrix about 2 days using msieve.

schickel 2011-11-05 04:21

OK, so just to double down on everything, how about another team job?

henryzz 2011-11-05 16:30

I can do the postprocessing. It would be a good test for my computer now I have sorted the memory problems.

schickel 2011-11-06 03:04

[QUOTE=henryzz;277277]I can do the postprocessing. It would be a good test for my computer now I have sorted the memory problems.[/QUOTE]OK, sounds good. I'm in the final stages of a c153; ETA for completing sieving is Monday at the latest. I'll start sieving on this after that..... My c153 is going at ~3.5M rels/day, so I'm not exactly a speed demon.

schickel 2011-11-06 15:38

I'll take 15-20M.

schickel 2011-11-12 16:08

I guess I'll take 20-25M, too.

bsquared 2011-11-12 19:58

I'll take 25M to 45M

schickel 2011-11-13 03:55

[QUOTE=bsquared;278072]I'll take 25M to 45M[/QUOTE]What's your ETA? I'm getting ~3+ rels/special_q, so with my 10 currently and your potential 60, that should be enough.

I'll taper off and start uploading when you're near to done.

Still going to do the post, henryzz?

bsquared 2011-11-13 14:45

[QUOTE=schickel;278086]What's your ETA? I'm getting ~3+ rels/special_q, so with my 10 currently and your potential 60, that should be enough.

I'll taper off and start uploading when you're near to done.

Still going to do the post, henryzz?[/QUOTE]

I'm about 75% done, so the ETA is later today sometime. [edit: about 7 hours from now]

I'll also offer to do the post processing... if you still want it henryzz, say the word and I'll upload my relations. otherwise, I'll grab schickel's and finish it.

schickel 2011-11-13 14:58

[QUOTE=bsquared;278127]I'm about 75% done, so the ETA is later today sometime. [edit: about 7 hours from now]

I'll also offer to do the post processing... if you still want it henryzz, say the word and I'll upload my relations. otherwise, I'll grab schickel's and finish it.[/QUOTE]Sounds good, though henryzz may be away until later today, so he may not respond 'til later. Also, I won't be able to start uploading until after work this evening.

And, if possible, I had only just started hitting the 20M+ range, so it might pay to run the 21-25M range if you can....


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