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 2011-01-12, 06:22 #45 ixfd64 Bemusing Prompter     "Danny" Dec 2002 California 2,477 Posts Any updates?
 2011-03-09, 05:00 #46 moebius     "CharlesgubOB" Jul 2009 Germany 2×311 Posts I am very interested in the runtimes for a GTX560 Ti related to Phenom II 955, Linux64. How many hours will it take to prove primality of M4264380 on it? I would of course be available with this card for a test.
2011-03-10, 05:41   #47
ckdo

Dec 2007
Cleves, Germany

2·5·53 Posts

Quote:
 Originally Posted by moebius How many hours will it take to prove primality of M4264380 on it?
Saving you the heartache: It's not prime.

 2011-03-10, 09:35 #48 sdbardwick     Aug 2002 North San Diego County 10111001112 Posts Just for clarification: 4264380 is not prime, so (2^4264380)-1 cannot be prime.
2011-03-10, 10:22   #49
axn

Jun 2003

22×3×449 Posts

Quote:
 Originally Posted by ckdo Saving you the heartache: It's not prime.
Quote:
 Originally Posted by sdbardwick Just for clarification: 4264380 is not prime, so (2^4264380)-1 cannot be prime.
All this for a simple typo?

2011-03-10, 15:00   #50
ckdo

Dec 2007
Cleves, Germany

53010 Posts

Quote:
 Originally Posted by axn All this for a simple typo?
Yes.

If moebius receives any time estimates for an exponent an order of magnitude smaller than the one he's (supposedly) interested in, they aren't gonna help him that much, either, so hinting at what happened seemed like a reasonable route to follow.

2011-03-10, 15:10   #51
Mini-Geek
Account Deleted

"Tim Sorbera"
Aug 2006
San Antonio, TX USA

427810 Posts

Quote:
 Originally Posted by ckdo Yes. If moebius receives any time estimates for an exponent an order of magnitude smaller than the one he's (supposedly) interested in, they aren't gonna help him that much, either, so hinting at what happened seemed like a reasonable route to follow.
Considering the intended exponent is pretty obvious, it would be better if we could just say something to the effect of:
"M42643801 would take X hours."
But the program isn't released, so nobody so far has really been able to answer it...

2011-03-10, 19:20   #52
moebius

"CharlesgubOB"
Jul 2009
Germany

26E16 Posts

Quote:
 Originally Posted by sdbardwick Just for clarification: 4264380 is not prime, so (2^4264380)-1 cannot be prime.
Too bad, I thought I had found the first even prime number ... haha

2011-03-10, 19:39   #53
xilman
Bamboozled!

"๐บ๐๐ท๐ท๐ญ"
May 2003
Down not across

3×13×293 Posts

Quote:
 Originally Posted by moebius Too bad, I thought I had found the first even prime number ... haha
ITYM the second even prime number. HTH, HAND.

Paul

2011-03-10, 20:23   #54
moebius

"CharlesgubOB"
Jul 2009
Germany

2×311 Posts

Quote:
 Originally Posted by xilman ITYM the second even prime number. HTH, HAND. Paul
I do not think in such a trivial range of numbers.

 2011-03-13, 04:37 #55 Christenson     Dec 2010 Monticello 111000000112 Posts Back to King Kurly's question: Which GPU should be in my future, assuming my budget is only \$500 or so? 100GHz days per day makes my Phenom II x6 seem, well, puny!

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