On Nov 4, 9:18 am, David <david.astgt...@gmail.com> wrote: > On an x86-64 machine using GCC version 4.3.3 (Ubuntu 4.3.3-5ubuntu4), > both the C code and C++ code fail for me. > I get: > x=505478909. > Does x=-872412446? > > Changing the unsigned long's to unsigned int's fixed the problem. > And it does matter: before the change, the generator failed a variety > of tests (really odd assortment, though: parking lot, 2dsphere, > 3dsphere, squeeze, and sums).
OK, makes sense. The RNG must assume 32 bit longs.