In article <email@example.com>, firstname.lastname@example.org writes:
> Galathaea's concern was about the period, and she is very right to > be so concerned. While a long period does not guarantee pseudo- > randomness, it is a prerequisite for it - in particular, the pseudo- > random properties in N dimensions are often limited by the Nth root > of the period. And, despite common belief, that is NOT solely true > for multiplicative congruential generators.
The period of RANLUX is huge---10**164 or something. (In other words, many orders of magnitude larger than the number of distinct bit combinations. Many lesser generators have a period much LESS than the number of distinct bit combinations and some algorithms can have a period at most as long as the number of distinct bit combinations. In these cases, of course, a given number x is always followed by a given number y, which with RANLUX is not the case.)