mersenneforum.org

mersenneforum.org (https://www.mersenneforum.org/index.php)
-   Aliquot Sequences (https://www.mersenneforum.org/forumdisplay.php?f=90)
-   -   Subproject #11: 2^2 * 3 - Lose the '3' (https://www.mersenneforum.org/showthread.php?t=16075)

firejuggler 2011-12-09 02:59

An update of the first post, I mean

bchaffin 2011-12-09 05:53

Releasing 742740: added 360 terms (min 113 digits): i1215 (size 139) = 2^3 * 3^3 * 5^2 * c135

schickel 2011-12-09 07:48

[QUOTE=firejuggler;281599]An update of the first post, I mean[/QUOTE]Updated the status of everything in the top post. I deleted a couple of sequences that weren't 2^2 * 3.
[QUOTE=bchaffin;281622]Releasing 742740: added 360 terms (min 113 digits): i1215 (size 139) = 2^3 * 3^3 * 5^2 * c135[/QUOTE]Do you have the resources to do this one easily? If the c135 splits in two, you could get an escape from the driver. That would beat [B]mataje[/B]'s escape:[code]
[B]driver sz seq index[/B]
2^3 * 3 * 5 135 167148 3916[/code]

LaurV 2011-12-09 08:25

[QUOTE=schickel;281628]If the c135 splits in two, you could get an escape from the driver. [/QUOTE]
it can't, is 4k+3 and 5k-1, at most could get rid of one 3 and one 5.

schickel 2011-12-09 08:31

[QUOTE=LaurV;281630]it can't, is 4k+3 and 5k-1, at most could get rid of one 3 and one 5.[/QUOTE]Well, that shoots that one down.....it might be worth at least one big NFS jobs, then, just to see if the next line keeps the exponents of the 3 & 5 where they are [I]and[/I] has a big co-factor.

EdH 2011-12-09 15:29

Just for curiosity, I'll try a line or two. Not sure how long it will run, but would like to see...

reserving 742740

schickel 2011-12-09 19:20

[QUOTE=EdH;281665]Just for curiosity, I'll try a line or two. Not sure how long it will run, but would like to see...

reserving 742740[/QUOTE]OK, but I'm going to move this reservation to the main thread, since it's not really in this project any more....

bchaffin 2011-12-09 21:13

[QUOTE=schickel;281628][code]
[B]driver sz seq index[/B]
2^3 * 3 * 5 135 167148 3916[/code][/QUOTE]

I'm confused. That driver/index doesn't seem to correspond to sequence 167148 in the DB -- it's at 3943, and for index 3916 I see 2^4 * 3^2 * 5.

schickel 2011-12-09 21:32

[QUOTE=bchaffin;281707]I'm confused. That driver/index doesn't seem to correspond to sequence 167148 in the DB -- it's at 3943, and for index 3916 I see 2^4 * 3^2 * 5.[/QUOTE]Sorry, I didn't include the reference. That's from Clifford's [URL="http://www.lafn.org/~ax810/aliquot.htm"]page[/URL] where he has a table of the highest escapes from the main drivers. For the real story, look at [URL="http://factordb.com/sequences.php?se=1&eff=2&aq=167148&action=range&fr=3910&to=3919"]i3915[/URL]....

Andi47 2011-12-10 06:34

[QUOTE=schickel;281709]Sorry, I didn't include the reference. That's from Clifford's [URL="http://www.lafn.org/~ax810/aliquot.htm"]page[/URL] where he has a table of the highest escapes from the main drivers. For the real story, look at [URL="http://factordb.com/sequences.php?se=1&eff=2&aq=167148&action=range&fr=3910&to=3919"]i3915[/URL]....[/QUOTE]

Note that it's almost a year since he last updated his page.

schickel 2011-12-10 07:04

[QUOTE=Andi47;281747]Note that it's almost a year since he last updated his page.[/QUOTE]Yes, it has. Since he doesn't respond to emails right away, I assume he's got more important stuff going on that keeping the page up-to-date.....'course you know what they say about ASS-U-ME-ing.


All times are UTC. The time now is 09:56.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.