`random_ff'
-----------

random_ff()
     :: $BM-8BBN$N85$NMp?t@8@.(B

RETURN
     $BM-8BBN$N85(B

   * $BM-8BBN$N85$rMp?t@8@.$9$k(B.

   * `random()', `lrandom()' $B$HF1$8(B 32bit $BMp?tH/@84o$r;HMQ$7$F$$$k(B.

     [0] random_ff();
     random_ff : current_ff is not set
     return to toplevel
     [0] setmod_ff(pari(nextprime,2^40));
     1099511627791
     [1] random_ff();
     561856154357
     [2] random_ff();
     45141628299

$B;2>H(B
     *Note `setmod_ff': setmod_ff, *Note `random': random, *Note
     `lrandom': lrandom

