http://blogs.msdn.com/alfredth/archive/2006/09/26/random-numbers.aspxOne of the things that gets used and discussed a lot by beginning programmers is random numbers. of course those of us who have been around the block know that computer generated numbers are really pseudo-random numbers. It's a fairly short and reasonableen-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/alfredth/archive/2006/09/26/random-numbers.aspx#773841Wed, 27 Sep 2006 18:09:16 GMT91d46819-8472-40ad-a661-2c78acb4018c:773841Rosynaprograms that depend on random numbers not being random? OMGWTFBBQ?!http://blogs.msdn.com/alfredth/archive/2006/09/26/random-numbers.aspx#773929Wed, 27 Sep 2006 19:01:18 GMT91d46819-8472-40ad-a661-2c78acb4018c:773929Alfred ThompsonFor testing purposes one very often would like a known set of &quot;random&quot; numbers coming up. This lets you make sure that the rest of the algorythm is working correctly. Generally when the code is put into production some additional randomization is put into place by, for example, using the date/time as a seed value. But if you know that one seed gives a specific set of numbers you don't want that to change oout from under you.http://blogs.msdn.com/alfredth/archive/2006/09/26/random-numbers.aspx#777401Sat, 30 Sep 2006 00:27:24 GMT91d46819-8472-40ad-a661-2c78acb4018c:777401bob heffingtonI need to break a computer generated number system that changes daily. This is a 5 digit number. The first two digits are the current month but the last three change daily. <br> <br>On 12/19/05 the code was 12030. I have not been able to duplicate this number. can you help me? &nbsp; &nbsp; Thanks, Bobhttp://blogs.msdn.com/alfredth/archive/2006/09/26/random-numbers.aspx#779484Sun, 01 Oct 2006 17:35:37 GMT91d46819-8472-40ad-a661-2c78acb4018c:779484Alfred ThompsonThere isn't really enough information here for me to even think about trying. One would need a very large data set and more information about where the number comes from and how it is used.