This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A113970 #14 Aug 18 2018 08:31:55 %S A113970 4,9,3,1,0,8,3,5,9,7,0,2,8,5,0,1,9,0,0,2,7,5,7,7,7,6,7,2,3,9,0,7,6,4, %T A113970 9,5,7,2,8,4,9,0,7,7,7,2,1,5,0,2,0,8,6,3,2,0,8,0,7,5,0,1,8,4,0,9,7,9, %U A113970 2,6,2,7,8,8,5,0,9,7,6,5,8,8,6,4,5,5,7,8,0,2,0,1,3,6,6,0,0,7,3,2,8,6,7,9,5 %N A113970 The first illegal executable prime number (the 1811 digits of its decimal expansion). %C A113970 The first illegal prime number (1401 digits, cf. A113969) was generated on March 2001 by Phil Carmody. Its binary representation corresponds to the compressed version of the C source code of a computer program implementing the DeCSS decryption scheme, making any DVD copy readable with any DVD player. This prime number here (1811 digits) represents a *non-compressed executable* that performs the same task as the compressed program. Interpreted in this particular way, this number describes a computer program which bypasses copyright protection schemes on some DVDs. Such programs are illegal to possess or distribute under the Digital Millennium Copyright Act. Of course, any prime number is not illegal, although such an interpretation of it could be. It's fully displayed in the Wiki link below. %D A113970 David Wells, Prime numbers, John Wiley and Sons, Inc. (2005), p. 127. %H A113970 Nathaniel Johnston, <a href="/A113970/b113970.txt">Table of n, a(n) for n = 1..1811</a> (full sequence) %H A113970 Wikipedia, <a href="http://en.wikipedia.org/wiki/DeCSS">DeCSS</a>. %H A113970 Wikipedia, <a href="http://en.wikipedia.org/wiki/Illegal_prime">Illegal prime</a>. %Y A113970 Cf. A113969. %K A113970 base,easy,fini,full,nonn %O A113970 1,1 %A A113970 _Alexandre Wajnberg_, Jan 31 2006