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-   -   2801^79-1 reservations (CLOSED 27 AUGUST) (https://www.mersenneforum.org/showthread.php?t=13305)

 Andi47 2010-06-26 07:07

1 Attachment(s)
Current relation count:

[CODE]
total Q's sieved 110,200,000
total relations 212,509,920
relations / Q 1.928
[/CODE]

 fivemack 2010-06-26 10:12

That big notch at the start is tempting me to resieve the region that I sieved on the wrong side, for purely aesthetic reasons; it would be mathematically inefficient.

 Andi47 2010-06-26 10:20

[QUOTE=fivemack;219943]That big notch at the start is tempting me to resieve the region that I sieved on the wrong side, for purely aesthetic reasons; it would be mathematically inefficient.[/QUOTE]

Why would it be inefficient? Is the duplication rate higher when a range is sieved on both sides?

BTW: Some more figures:
[CODE]
max. rel/Q: 2.092 in the range of 24-28M
your notch: 2.000 rel/Q (almost near the maximum)
leading edge: ~1.73 rel/Q (currently around Q~137M)[/CODE]

 fivemack 2010-06-26 19:43

For 19.8-112 + 113-137, I have

[code]
Sat Jun 26 12:29:21 2010 found 39584889 hash collisions in 223071581 relations
Sat Jun 26 12:36:44 2010 found 37575436 duplicates and 186716113 unique relations
Sat Jun 26 13:55:49 2010 begin with 186716113 relations and 239612437 unique ideals
[/code]

which sounds as if a huge and ugly matrix might be possible about the time we reach q0=200; will be necessary to sieve a bit beyond that to get a practical matrix.

 apocalypse 2010-07-26 15:44

Completed 174M-178M. 6251616 relations in the range, 6232926 unique. Will upload later.

Reserving 202M-206M.

 fivemack 2010-07-30 14:02

I'm back in the country and ssh.fivemack.org is accepting relations again.

 chris2be8 2010-08-07 19:19

Reserving 216M-220M.

Chris K

 apocalypse 2010-08-10 00:42

Completed 212M-216M. 5762377 relations in the range, 5747945 unique.

Could not connect to ftp. Will upload later.
[CODE]\$ ftp fivemack.dyndns.org
ftp: connect: Connection timed out
[/CODE]

Reserving 220M-224M.

 fivemack 2010-08-10 08:39

Sorry about the ftp outage: my ADSL router got a bit hot and stopped routing. I turned it off overnight and it seems OK now.

 chris2be8 2010-08-10 18:00

208M-212M completed and uploaded. 5807956 relations.

Chris K

 fivemack 2010-08-11 08:51

OK, we've got enough relations for a matrix, but at the moment the matrix is enormous (27.8M cycles - I'm having to use a 32G machine just to build it). I propose that we keep sieving until the end of August, and then the matrix shouldn't take much longer than the whole of September to run.

Thanks to everyone for staying with me on this rather large computation.

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