tle-endian order.  <EM>n-bits</EM> specifies how many bits should be considered as significant
in the resulting number.</P><P><TT>integer-to-octets</TT> is the reverse operation.</P><DIV CLASS="lisp-symbol"><A NAME="expt-mod"></A><TT><STRONG>expt-mod</STRONG>  =&gt; <EM>number</EM></TT><BR /></DIV><P>Raises <EM>n</EM> to the <EM>exponent</EM> power modulo <EM>modulus</EM> in
a more efficient fashion than <TT>(MOD (EXPT N EXPONENT) MODULUS)</TT>.</P><H2>Conditions</H2><DIV CLASS="lisp-symbol"><A NAME="ironcl