A positive ```
integer
```

or a positive ```
float
```

.

An object of type ```
mt-random-state
```

. The default is the value of ```
*mt-random-state*
```

.

The function ```
mt-random
```

returns a pseudo-random number which is non-negative, less than *
arg*
and is of the same type as *
arg*
.

*
random-number*
is generated using the Mersenne Twister algorithm published by Makoto Matsumoto and Takuji Nishimura at

```
http://www.math.keio.ac.jp/~matumoto/emt.html
```

.

We thank the authors for making the algorithm freely available.

LispWorks Reference Manual - 6 Apr 2005