mersenneforum.org Reserved for MF - Sequence 4788
 Register FAQ Search Today's Posts Mark Forums Read

 2012-10-26, 08:02 #1992 jrk     May 2008 3·5·73 Posts I've started polynomial selection.
2012-10-26, 08:08   #1993
BigBrother

Feb 2005
The Netherlands

3328 Posts

Quote:
 Originally Posted by jrk I've started polynomial selection.
I can do the sieving and postprocessing again, I love this teamwork!

jfk, what do you use for poly selection?

 2012-10-26, 09:43 #1994 debrouxl     Sep 2009 977 Posts For polynomial selection, jrk uses (and contributes to) msieve.
2012-10-26, 12:06   #1995
BigBrother

Feb 2005
The Netherlands

2·109 Posts

Quote:
 Originally Posted by debrouxl For polynomial selection, jrk uses (and contributes to) msieve.
I meant the hardware he uses.

2012-10-26, 12:16   #1996
pinhodecarlos

"Carlos Pinho"
Oct 2011
Milton Keynes, UK

131516 Posts

Quote:
 Originally Posted by BigBrother I meant the hardware he uses.
Nvidia card.

Last fiddled with by pinhodecarlos on 2012-10-26 at 12:17

2012-10-27, 07:39   #1997
jrk

May 2008

3·5·73 Posts

Quote:
 Originally Posted by BigBrother I can do the sieving and postprocessing again, I love this teamwork!
Here's a poly:
Code:
# aq4788:5073
# sieve with gnfs-lasieve4I14e on -a side from Q=7M to 29M
n: 29712030350422056407764987099112246876809290443496977616436205075052415484201116636430793917656509571664421538011459411836589836444181684355772841911
# norm 2.618315e-14 alpha -6.295424 e 7.663e-12 rroots 5
skew: 1166080.80
c0:  23750490127131804180671875097430105
c1:  665524504274009633437655504074
c2:  502177263538284124971913
c3: -940909512238674179
c4: -306611097123
c5:  296100
Y0: -39838125003638225433615547286
Y1:  46716866412058447
rlim: 14000000
alim: 14000000
lpbr: 29
lpba: 29
mfbr: 58
mfba: 58
rlambda: 2.55
alambda: 2.55
Quote:
 Originally Posted by BigBrother jfk, what do you use for poly selection?
msieve on a GTX 570

2012-10-27, 11:33   #1998
BigBrother

Feb 2005
The Netherlands

2×109 Posts

Quote:
 Originally Posted by jrk Here's a poly:
Thanks, I have started sieving.
Quote:
 Originally Posted by jrk msieve on a GTX 570
That's a bigger gun than mine :)

 2012-11-09, 14:13 #1999 BigBrother   Feb 2005 The Netherlands 2×109 Posts Now at line 5078, I'm already sieving the c133.
 2012-11-09, 14:47 #2000 richs     "Rich" Aug 2002 Benicia, California 3·409 Posts How does a 2^4 * 31 driver break?
2012-11-09, 15:50   #2001
LaurV
Romulan Interpreter

Jun 2011
Thailand

100100100101002 Posts

Quote:
 Originally Posted by richs How does a 2^4 * 31 driver break?
the easiest way is when you succeed to raise 31 at ^2

2012-11-09, 19:37   #2002
Dubslow

"Bunslow the Bold"
Jun 2011
40<A<43 -89<O<-88

3·29·83 Posts

Quote:
 Originally Posted by LaurV the easiest way is when you succeed to raise 31 at ^2
Or any even power. Then the sequence is effectively class 4, which means it needs to the rest (besides 2^4*31^(2n)) needs to be a product of 4 primes or less, but that's not sufficient. (There are some restrictions on what each prime has to be mod 4 or mod 8 etc. Also, and other prime raised to an even power doesn't count against that 4.)

 Similar Threads Thread Thread Starter Forum Replies Last Post RichD Aliquot Sequences 474 2021-03-07 20:28 RichD Aliquot Sequences 468 2021-01-27 01:16 kar_bon Aliquot Sequences 127 2020-12-17 10:05 prism019 GPU to 72 6 2020-09-21 22:11 petrw1 Lone Mersenne Hunters 82 2010-01-11 01:57

All times are UTC. The time now is 11:04.

Sun Apr 11 11:04:20 UTC 2021 up 3 days, 5:45, 1 user, load averages: 1.79, 1.65, 1.67

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.