Month: August 2014

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I took a 2048-bit RSA modulus from a Certificate that appears when one clicks on the lock icon in the browser at http://www.nsa.gov (GeoTrust Global).  This is originally written as a  256 two-hexit (hexadecimal) array of numbers from 0 to 255 as two hexadecimal values, including the leading zero when required. Then, I converted the… Continue reading can you find the RSA-2048 modulus?

i use twitter to look for experts, names, or expert companies. also, Tweets can register (small)public memos, and provide WordPress Blog post digests by “Tweeting” a Post …

<div class=”fb-post” data-href=”https://www.facebook.com/photo.php?v=684176694990013&#8243; data-width=”466″><div class=”fb-xfbml-parse-ignore”><a href=”https://www.facebook.com/photo.php?v=684176694990013″>Post</a&gt; by <a href=”https://www.facebook.com/SEOULICM2014″>The International Congress of Mathematicians 2014</a>.</div></div>

I’m copying below a clean copy of my latest C program to find some (but not all) record breaking values of the modified total stopping time to reach ‘1’, based on a small variant of the Lagarias total stopping time function sigma_{oo} (n),  for integers  n at least two, introduced by Jeffrey Lagarias in his… Continue reading Clean vetted C program for Collatz total stopping time records

——————————————– This below confirms that for n = 12,235,060,455 it takes 1184 iterations of the mapping: f(k) := 3k+1 (for k>=1 and odd)f(k) := k/2 (for k>=2 and even) in order to reach 1. This of course is related to the Collatz conjecture.I’ll call this way of counting total steps theMODIFIED TOTAL STOPPING TIME (in… Continue reading Defining a modified Total Stopping Time function for Collatz conjecture

I’m now on CentOS 6.5 for the x86_64 architecture. Upgrading via “yum update” had gone smoothly since about CentOS 6.3, about 18 months ago. I’m satisfied with GNOME 2.28. But I hear that CentOS 7 no longer has GNOME 2.28, rather GNOME 3. I’ve invested a lot of time in installing software that works and… Continue reading Why I won’t upgrade to CentOS 7