Factorial

Score: 89.13 (pass)

a few chars shaven.

#!perl -l 
$i=pop;$_=$i?$i:1;while(--$i>0){$_*=$i;s/.*(\d{4}[1-9])0*/$1/}s/.*([1-9])0*/$1/;print

Score: 102.13 (pass)

#!perl -l
$i=pop;$n=$i>0?$i:1;while(--$i>0){$n*=$i;$n=~s/.*(\d{4}[1-9])0*$/$1/g}$n=~s/.*([1-9])0*/$1/;print$n