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 2011-05-24, 03:09 #562 cipher     Feb 2007 211 Posts 5600-5900T Range 2 cipher reserved.
 2011-05-24, 05:32 #563 cipher     Feb 2007 211 Posts 5420-5500 Complete cipher http://dl.dropbox.com/u/26515272/5420-5500.rar
 2011-05-27, 07:20 #564 JohnFullspeed   May 2011 France 7×23 Posts Range Sorry i do'nt understand you notation for example 5390T-5420T ???? Can you give the number of digis or a 2^X expression Thanks John
2011-05-27, 07:56   #565
kar_bon

Mar 2006
Germany

B6D16 Posts

Quote:
 Originally Posted by JohnFullspeed 5390T-5420T ????
5390T = 5390 * 10^12

for the example range you gave, the first factor found was (see link above):

5390002989229981 | 5797113*2^487536+1

 2011-05-27, 15:29 #566 JohnFullspeed   May 2011 France 7·23 Posts Range Thanks 5390T = 5390 * 10^12 But in the sample why ^12? not 10 or20 :just a convention? Regards John
2011-05-27, 16:02   #567
Puzzle-Peter

Jun 2009

22·173 Posts

Quote:
 Originally Posted by JohnFullspeed Thanks 5390T = 5390 * 10^12 But in the sample why ^12? not 10 or20 :just a convention? Regards John
using multiples of 3 for the exponents reflects the way our number system is constructed: We talk about thousand, million, billion, trillion etc. so we use 10^3, 10^6, 10^9, 10^12 or their SI prefixes k(ilo), M(ega), G(iga), T(era) etc.
Apart from that, it is just a matter of what you're used to do. When I think about 10,000,000,000, I think "10G" instead of "10^10".

 2011-05-27, 16:34 #568 JohnFullspeed   May 2011 France 7·23 Posts Thanks Merci I well want to joint the projet Could you give a range and where I can download the application for Windox Xp? John Last fiddled with by JohnFullspeed on 2011-05-27 at 16:47
2011-05-27, 20:49   #569
ellipse

Nov 2010

2×3×5 Posts

Quote:
 Originally Posted by JohnFullspeed I well want to joint the projet Could you give a range and where I can download the application for Windox Xp?
It looks like every range below the optimal sieve depth for n=480K-490K has been taken.

You can try sieving n=490K-495K. The software is here: http://sites.google.com/site/kenscode/prime-programs
but the n=490K-495K file isn't available. If gribozavr uploads it, you can try a range of 950T-960T. That will take you 2-3 days to complete.

You can also do some LLR tests. See this post for details:
http://www.mersenneforum.org/showpos...67&postcount=2

 2011-05-27, 23:22 #570 gribozavr     Mar 2005 Internet; Ukraine, Kiev 11×37 Posts 490000-494999_28may2011.zip http://www.sendspace.com/file/1gt6iz
 2011-05-31, 05:50 #571 mdettweiler A Sunny Moo     Aug 2007 USA (GMT-5) 141518 Posts 5530T-5535T (range 2) complete, 861 factors: http://www.sendspace.com/file/6lrihu Reserving 950T-955T (range 3).
 2011-05-31, 07:53 #572 Oddball     May 2010 499 Posts 5535T-5600T complete, 11319 factors found: http://www.sendspace.com/file/clkcme (strange coincidence: the end of the sendspace link almost looks like it said "click me". I think that's the first time that something like this happened.) Last fiddled with by Oddball on 2011-05-31 at 07:55

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