For the original DCMT sources, see
http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/DC/dc.html

The code here is version 0.6.2 of June 25, 2014. It is modified
only in the removal of functions pertaining to the "old interface"
(not thread-safe) of DCMT, in seive.c, since in gretl we use the
new interface exclusively.

Allin Cottrell, 2015-05-03