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Old 2013-02-03, 21:04   #13
stathmk
 
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Mar 2009
Indiana, United Stat

24·3 Posts
Unhappy Factors of 2^(repunit)-1

I must be missing some information. What programs besides GIMPS are you using? I want to find out if there’s a program that can find at least one factor of 2^((10^19-1)/9)-1 and/or 2^((10^23-1)/9)-1. I wondered if I should check a C or Cygwin program before going onto GIMPS. I’ve been checking Operation Billion Digits at web pages like these:
http://www.mersenneforum.org/showthread.php?t=15294
http://home.earthlink.net/~elevensmo....html#Download
http://www.moregimps.it/mersenne-test/howto.php
http://www.moregimps.it/billion/download1.php (I can’t get Cygwin to work for some reason. I know I got it working 4 years ago.)
About how many weeks would it take to find a factor?
What do you suggest that I do?

Edit: At Cygwin setup, I'm not understanding which packages to download.

Last fiddled with by stathmk on 2013-02-03 at 21:26
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