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Old 2013-07-11, 06:41   #1
RichD
 
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Default Reserved for MF - Sequence 3408

I have received a note from Christophe stating sequence 3408 is available for advancement. It currently stands at index 1287 with a c152 remaining. (FDB has been updated with his log file.) Accordingly, it is ready for GNFS. Now we just need a poly... hint, hint.

He posed two questions that I can not answer and will post to the community.

Quote:
Please could you confirm me that you reserve 3408 if you are happy with it?
Also, should I consider that you release 4788?
Could someone with a higher pay scale provide these answers?
I will let him know of our decision in the next email.

P.S. 2 * 3^2 * 23 * c152

Link to sequence 3408 in the database.

Last fiddled with by Prime95 on 2016-06-23 at 03:03
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Old 2013-07-13, 10:07   #2
VBCurtis
 
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I can handle poly select for it this week, but what makes you sure it is ready for GNFS now?
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Old 2013-07-13, 21:44   #3
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Quote:
Originally Posted by VBCurtis View Post
I can handle poly select for it this week, but what makes you sure it is ready for GNFS now?
Thanks.

From Christophe:
"The c152 cofactor has been tried 5600 curves at B1=11e6 and 8100 curves at B1=43e6. I think its time to gnfs it."
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Old 2013-07-14, 04:31   #4
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Fair enough- I can have a poly in a few days for you. I'd appreciate someone indulging my laziness and posting the composite here, since I don't have a ton of experience retrieving individual numbers from the db.

There is a thread in the msieve forum where a couple of us who are trying to gain familiarity with the msieve tools are running GPU poly select on candidates 150+ digits posted by anyone who wants the help. If this effort continues, consider posting the big composites in there- good polys are often produced in a day or two by one of us.

-Curtis
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Old 2013-07-14, 04:43   #5
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Quote:
Originally Posted by VBCurtis View Post
I'd appreciate someone indulging my laziness and posting the composite here, ...
OK, and will remember your offer by posting in the other thread.

A3408:i1287
Code:
25797575131790381764317406030419543530247871027977137938177849677244690157065100738893911971862010361529679087277839665771863704705529497481575938310123
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Old 2013-07-14, 06:06   #6
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Oh silly me. I could have provided a link to the last term.
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Old 2013-07-15, 02:37   #7
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It looks like I may have stepped out of bounds. Is there any interest in advancing low numbered sequences as a team effort? Could a Mod present a poll to see if "the forum" should release 4788 and/or take on 3408? If nothing else, I can advance 3408 a couple indexes myself.
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Old 2013-07-15, 05:40   #8
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Rich-
I'm interested in learning how to manually set GGNFS commands to assist with a team sieve- so I'll offer a couple cores of assistance for 3408 to advance a bit, assuming we decide on a method for transferring you the data.

Here are the only two decent polys I found for the C152:
Code:
# norm 9.745627e-015 alpha -7.744336 e 3.793e-012 rroots 3
skew: 1341467.56
c0: -2517106373804145181364286197055054075
c1: -181618619647482158982503505948
c2: -6280170503010468554850924
c3: -16534603320158905976
c4: 15888436541215
c5: 3003900
Y0: -97001535586366271156398420418
Y1: 15535061495212391
almost tied in score:
Code:
 # norm 9.610087e-015 alpha -6.026309 e 3.779e-012 rroots 5
skew: 245227.61
c0: -6897520423128801498842225861018080
c1: 13052139425774434204133751403
c2: 1788987296416905005831341
c3: 2268360959361746978
c4: -34520814515709
c5: 6300540
Y0: -83645054002236074626072321611
Y1: 7612890022579361
I had only one other poly above 3.55, in 800MB of np1 hits and 50 hr of -nps.
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Old 2013-07-22, 21:32   #9
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Quote:
Originally Posted by VBCurtis View Post
Rich-
I'm interested in learning how to manually set GGNFS commands to assist with a team sieve- so I'll offer a couple cores of assistance for 3408 to advance a bit, assuming we decide on a method for transferring you the data.
Thanks VBCurtis,

Sorry it sat so long but I just got back from a short trip. I'll put together the other parameters and instructions and post them later today.
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Old 2013-08-02, 18:59   #10
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The C122 at index 1292 has received t35 @ B1=3e6 (600 curves).
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Old 2013-08-02, 23:07   #11
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Default 3408:i1292

Quote:
Originally Posted by debrouxl View Post
The C122 at index 1292 has received t35 @ B1=3e6 (600 curves).
I'm thinking the C122 needs about 1t40 or 900 @ 11e6 plus all curves at 3e6.

Oh, but wouldn't 900 @ 11e6 be enough to cover the t40 @ 3e6??

Anyway, I should be close to 900 @ 11e6 later tonight and will start GNFS for an overnight run if a factor doesn't pop up before then.
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