mersenneforum.org  

Go Back   mersenneforum.org > Factoring Projects > Aliquot Sequences

Reply
 
Thread Tools
Old 2011-02-19, 03:23   #1
schickel
 
schickel's Avatar
 
"Frank <^>"
Dec 2004
CDP Janesville

1000010010102 Posts
Default Team sieve #24: c155 from 4788:2618

After another exciting round of Find The Factors, we now come to a c155 on the very next line after a c172 (so easier, but still not a walk in the park).

22 Feb 2011: Post-processing has begun!
24 Feb 2011: Post-processing complete! c155=p72*p84. Next up is a c152 that bchaffin has started sieving.


The poly:
Code:
n: 75932340428877011727618708726905558562515248304152927449065726063130564403655850880406162753916607273084882142223225126840338325892660195804478997023817401
# norm 4.025205e-15 alpha -7.671371 e 2.488e-12 rroots 3
skew: 42373826.68
c0: -58398068784506051024477192866875977892800
c1: -167100295795302960137099458278320
c2:  511004049252803790191305716
c3: -13968245979099022648
c4: -357816499243
c5:  996
Y0: -2379225273126981752554350978483
Y1:  158202809821186829
rlim: 25000000
alim: 25000000
lpbr: 29
lpba: 29
mfbr: 58
mfba: 58
rlambda: 2.5
alambda: 2.5
Sieve special_q on -a side from 20M to 64M using siever 14e.

Post-processing will be done by bchaffin.

Sieve reservations:
Code:
20-40   bchaffin
40-42   jrk
42-50   bchaffin
50-60   bchaffin

Last fiddled with by Mini-Geek on 2011-02-25 at 02:43 Reason: updating
schickel is offline   Reply With Quote
Old 2011-02-20, 02:26   #2
bchaffin
 
Sep 2010
Portland, OR

17316 Posts
Default

Quote:
Originally Posted by jrk View Post
Alright good, so round that up to the next region and the specialq range is 20M to 64M.

Sieving can begin whenever!
I started about 10 minutes ago.

I can do the post-processing for this one. Alone, the sieving will take me about 3 days or a little more, so I'm OK to do it on my own. If others want to sieve as well and upload to sendspace, we can have the answer sooner. For now I'll work on 20M-40M.
bchaffin is offline   Reply With Quote
Old 2011-02-20, 02:32   #3
RichD
 
RichD's Avatar
 
Sep 2008
Kansas

309310 Posts
Default

Quote:
Originally Posted by jrk View Post
Use the params from this post, and if you don't mind doing a little more work, sieve samples of specialq's in ranges of 1000 for each 2M, starting at 20M, and see how far you have to go to get about 28500 relations. The upside of doing this is so that we get a nice range to work in, without having to worry about going overboard with the sieving and making the filtering/LA harder.
May I ask where the 28500 came from and/or was calculated?

RichD.
RichD is offline   Reply With Quote
Old 2011-02-20, 02:47   #4
jrk
 
jrk's Avatar
 
May 2008

3×5×73 Posts
Default

Quote:
Originally Posted by RichD View Post
May I ask where the 28500 came from and/or was calculated?

RichD.
From past experience, we want about 57M raw relations (before discarding dups) for a task this size using these parameters. Testing 1/2000 of the specialq's (a test range of 1000 for each 2M range) would yield about 28500 relations (1/2000 of 57M) from the sample ranges over which we'll need to sieve.
jrk is offline   Reply With Quote
Old 2011-02-20, 02:49   #5
jrk
 
jrk's Avatar
 
May 2008

109510 Posts
Default

Quote:
Originally Posted by bchaffin View Post
For now I'll work on 20M-40M.
I'll start 40M-42M. ETA two days.
jrk is offline   Reply With Quote
Old 2011-02-20, 02:59   #6
RichD
 
RichD's Avatar
 
Sep 2008
Kansas

3·1,031 Posts
Default

Quote:
Originally Posted by jrk View Post
From past experience, we want about 57M raw relations (before discarding dups) for a task this size using these parameters. Testing 1/2000 of the specialq's (a test range of 1000 for each 2M range) would yield about 28500 relations (1/2000 of 57M) from the sample ranges over which we'll need to sieve.
So 57M is based (only) upon the size, c155??

Thank you for the reply. I'm still working my way through SIQS and such, but looking ahead into GNFS.

RichD.
RichD is offline   Reply With Quote
Old 2011-02-20, 05:24   #7
schickel
 
schickel's Avatar
 
"Frank <^>"
Dec 2004
CDP Janesville

2×1,061 Posts
Default

I went ahead and changed the ECM thread to an NFS thread; hope that was OK.
schickel is offline   Reply With Quote
Old 2011-02-20, 06:03   #8
Andi47
 
Andi47's Avatar
 
Oct 2004
Austria

9B216 Posts
Default

100 ECM curves at B1=11e7, no factor. (these have been running overnight.)
Andi47 is offline   Reply With Quote
Old 2011-02-20, 08:51   #9
em99010pepe
 
em99010pepe's Avatar
 
Sep 2004

54168 Posts
Default

60@850M, no factor (these have been running overnight)
em99010pepe is offline   Reply With Quote
Old 2011-02-20, 10:27   #10
yoyo
 
yoyo's Avatar
 
Oct 2006
Berlin, Germany

22×3×72 Posts
Default

Are there some more ECM curves needed, I can run them in yoyo@home?

Which is the number to factor and which are the curves required for different B1 values?

yoyo
yoyo is offline   Reply With Quote
Old 2011-02-20, 10:55   #11
Andi47
 
Andi47's Avatar
 
Oct 2004
Austria

2×17×73 Posts
Default

Quote:
Originally Posted by yoyo View Post
Are there some more ECM curves needed, I can run them in yoyo@home?

Which is the number to factor and which are the curves required for different B1 values?

yoyo
Thanks for your offer to help, but for this one we have already done a few more curves than needed. Sieving has started this morning, and if I see correctly, ETA seems to be ~3-4 days.

I am sure the next composite which needs some ECM will be here soon.
Andi47 is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Team sieve #39: c155 from 3408:i1311 RichD Aliquot Sequences 46 2013-08-27 17:26
Team sieve #18: c171 from 4788:2527 10metreh Aliquot Sequences 46 2010-10-26 22:51
Team sieve #17: c163 from 4788:2509 10metreh Aliquot Sequences 141 2010-02-08 16:55
Team sieve #13: c135 from 4788.2447 henryzz Aliquot Sequences 31 2009-09-26 20:50
Team sieve #12: c141 from 4788.2443 henryzz Aliquot Sequences 55 2009-09-20 08:46

All times are UTC. The time now is 14:13.

Wed Sep 23 14:13:51 UTC 2020 up 13 days, 11:24, 0 users, load averages: 2.08, 1.95, 1.78

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.