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Miles Parker wrote: > And correct me if I'm wrong, but there are some algorithms in which > using a prime number would be a bad idea. Anyway, it seems to me that > any decent random stream generator should be able to take an arbitrary > seed and produce a good result. Primes etc. are really a figment of early linear congruential generators, for which non-prime parameters in the generator itself were famously bad choices (actually, not just non-prime but non-relatively-prime). Knuth III is very interesting in that regard. It's not the case for modern generators. Sean