in reply to Re^4: Predictable random sequence
in thread Predictable random sequence

Which one?

The one used by Math::Random::MT :) (Specifically, the version documented in the source code for the module.)

There are actually several variants of the MT, but the module only implements one of them, and it (the module) therefore produces the same sequences everywhere it compiles, regardless of whether it is compiled on a 32-bit or 64-bit platform; or what the underlying OS is. That is its main strength for simulation work.

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