If I read the code correctly, this is a Perl implementation of this, of which is claimed:
in reply to Re: MZT random number generator
in thread MZT random number generator
THIS IS THE BEST KNOWN RANDOM NUMBER GENERATOR AVAILABLE. ...
It passes ALL of the tests for random number generators and has a period of 2^144, is completely portable (gives bit identical results on all machines with at least 24-bit mantissas in the floating point representation).
so if you are looking for a deterministic, long-period pseudo-random number generator, perhaps this is it.