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

Andi47 2011-11-01 09:23

How much ecm had the c144 of iteration 2730?

starting 6 threads ECMing at B1=11e6...

Stargate38 2011-11-01 17:32

C144 already factored: [URL]http://factordb.com/sequences.php?se=1&eff=2&aq=4788&action=last20&fr=0&to=100[/URL]

Looks like someone already GNFS'd it. It's a 69/76 split. No wonder it was so hard to factor.

frmky 2011-11-01 18:59

[QUOTE=Stargate38;276612]C144 already factored: [URL]http://factordb.com/sequences.php?se=1&eff=2&aq=4788&action=last20&fr=0&to=100[/URL]
[/QUOTE]
Didn't take long to notice. :) Yes, I ran ECM for a day without luck, and decided to be impatient and do it with GNFS. It took about 1.5 days to run. I'm being particularly impatient with the C122. I have ECM and GNFS both running. Whichever finishes first... :smile:

Andi47 2011-11-03 05:03

1164@11e6 at the c141 of i2734, no factor

EdH 2011-11-03 18:49

I know 4788 is past this line, but my query is based on future value.

I recently started playing with 4788:2734 via aliqueit to see what it would do with the c141 and wondered if in the future this approach could allow me to submit anything of value towards the ECM level with the data written to the log.

I actually started it several times, so the log shows multiple tests for the same value. Each of the following lines from the log has been followed by the next aliqueit step, so all of them have been completed. These are the log lines:
[code]
[Nov 01 2011, 22:17:15] c141: running 74 ecm curves at B1=11e3...
[Nov 01 2011, 22:17:33] c141: running 214 ecm curves at B1=5e4...
[Nov 01 2011, 22:23:29] c141: running 74 ecm curves at B1=11e3...
[Nov 01 2011, 22:23:46] c141: running 214 ecm curves at B1=5e4...
[Nov 01 2011, 22:24:23] c141: running 430 ecm curves at B1=25e4...
[Nov 01 2011, 22:29:47] c141: running 904 ecm curves at B1=1e6...
[Nov 01 2011, 23:12:05] c141: running 2350 ecm curves at B1=3e6...
[Nov 02 2011, 00:10:05] c141: running 2271 ecm curves at B1=11e6...
[Nov 03 2011, 10:01:57] c141: running 74 ecm curves at B1=11e3...
[Nov 03 2011, 10:02:15] c141: running 214 ecm curves at B1=5e4...
[Nov 03 2011, 10:02:52] c141: running 430 ecm curves at B1=25e4...
[Nov 03 2011, 10:07:29] c141: running 904 ecm curves at B1=1e6...
[Nov 03 2011, 10:44:55] c141: running 2350 ecm curves at B1=3e6...
[/code]If I compile the preceeding lines:

222 curves @ 11e3
642 curves @ 5e4
860 curves @ 25e4
1808 curves @ 1e6
4700 curves @ 3e6
2271 curves @ 11e6

Is this correct, and is it of use in the overall determination of ECM level? Should I provide this type of information for future ECM runs, if I'm inclined to participate or should I leave 4788 to the "big guys?"

frmky 2011-11-03 19:25

[QUOTE=EdH;277023]should I leave 4788 to the "big guys?"[/QUOTE]
No. I happen to have free time on the small cluster right now so I've been throwing it at 4788, but that won't continue. Anyway, it seems stuck with a C158 right now. If ECM doesn't break it, it will be the next team sieve.

jrk 2011-11-03 19:57

[QUOTE=frmky;277032]If ECM doesn't break it, it will be the next team sieve.[/QUOTE]
I have started polynomial selection on the c158

Andi47 2011-11-09 06:52

2400@3e6 at the c157 of 4788.2741, no factor.

jrk 2011-11-09 18:32

Here's a poly for line 2741 c157:

[code][color=blue]# sieve with ggnfs siever 14e on alg side from Q=15M to 60M[/color]
# aq4788:2741
n: 1481920007172920321632684015692625609805984206540054444446952577396822360888953735158614084520196754869149889450540343135300182389495199905198697311390505007
# norm 4.111812e-15 alpha -7.532730 e 2.589e-12 rroots 1
skew: 1482966.09
c0: -5257854309105137028176287630689322269
c1: -11610693825698014790914425706848
c2: 15578263422883256843111696
c3: 33624011889155565220
c4: -7221188786619
c5: 970596
Y0: -1088322150509666538306440783662
Y1: 363038661537230021
rlim: 30000000
alim: 30000000
lpbr: 29
lpba: 29
mfbr: 58
mfba: 58
rlambda: 2.5
alambda: 2.5
[/code]

frmky 2011-11-09 20:30

[QUOTE=jrk;277716]Here's a poly for line 2741 c157:[/QUOTE]
ecm cracked it. :smile:

schickel 2011-11-09 21:05

[QUOTE=jrk;277716]Here's a poly for line 2741 c157:

[snip][/QUOTE]

[QUOTE=frmky;277727]ecm cracked it. :smile:[/QUOTE]Nice catch:[quote=FactorDB]28187367500116204879687812105802743791802250189[SUB]<47>[/SUB] ยท 5257390592...3[SUB]<110>[/SUB][/quote]


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