C181 @ i2124
 

It appears this sequence has not moved since April 19, 2014.
I would say it is dormant.

Currently at 2^3 * 3^3 * ... * C181.

[QUOTE=RichD;393977]It appears this sequence has not moved since April 19, 2014.
I would say it is dormant.

Currently at 2^3 * 3^3 * ... * C181.[/QUOTE]

Unstickying. If anyone wants to work on it and wants it stickying again just shout.

[QUOTE=prgamma10;373753]t50 done, no factor.[/QUOTE]

Any interest in resurrecting this sequence? Did anyone ever start toward t55 on the C181?

I am willing to help with ECM but hoping for a group (or tag team) effort.

Yoyo@Home has kindly taken on [url=http://www.rechenkraft.net/yoyo/y_status_ecm.php] ECM of this C181[/URL].

Who to find a good poly ? :smile:

[QUOTE=debrouxl;419049]Who to find a good poly ? :smile:[/QUOTE]

Sorry, I don't have a GPU rig set up so my contribution to a poly search would be negligible.

Do we need more ECM first, say 0.5t60?

[QUOTE=swellman;418846]Yoyo@Home has kindly taken on [url=http://www.rechenkraft.net/yoyo/y_status_ecm.php] ECM of this C181[/URL].[/QUOTE]

Yoyo is almost done with ECM at 30k curves @B1=260M with no factors falling out.

Can someone with a GPU search for the GNFS poly?

I'll run at it for a while. In case anybody else decides to join in, I started at the lowest A1.

I'll take a crack at poly select also, starting at a1=10M.

Best one up to A1=10M:

[CODE]expecting poly E from 7.47e-014 to > 8.59e-014
polynomial selection complete
R0: -43609006827127633229968650474586587
R1: 30695282756017099
A0: -29103488581110291761470265464081501440963200
A1: 2993874746608901791828362969242757760
A2: 755756990971875242506513249346
A3: -2594415869184082734595
A4: -688441371089106
A5: 9815400
skew 27455029.29, size 1.065e-017, alpha -7.794, combined = 7.362e-014 rroots = 3
elapsed time 19:28:48[/CODE]

Next best: [CODE]# norm 1.275569e-017 alpha -8.987163 e 7.265e-014 rroots 3
skew: 91826954.20
c0: -5010984928556546834369183181893308978133981616
c1: 107493796305280197439323537463109388072
c2: 1449080018344543787393819255354
c3: -64041478374807114794477
c4: -104963846484778
c5: 3723240
Y0: -52938738751154714424688482444638645
Y1: 33993486786774233[/CODE]

After 24 gpu-hrs, I'm only at 10.6M (default stage 1-norm). I got 300 hits 1.7e24 or better so far.

There's no way I'll get past 15M, if you'd like to continue from there.

I'm also running CADO polyselect from A1 = 1, at 1.3M now. I'll let that go a couple days and post its best poly too.