family of generators are described in</p>
<p> </p>
<div class="blockquote"><blockquote class="blockquote"><p>  "A portable high-quality random number generator for lattice field theory
  calculations", M. Luescher, Computer Physics Communications, 79 (1994) pp 100-110.  </p></blockquote></div>
<p> </p>
<p>The levels are given in</p>
<p> </p>
<div class="blockquote"><blockquote class="blockquote"><p>  "RANLUX: A Fortran implementation ofthe high-quality
  pseudorandom number generator of Luescher", F. James,