Multifactorials by primo (phpgolf.org)

<?for(;$e=ereg(~\xde\xd4,$t=$n=fgets(STDIN),$m);print+$t.~\xf5)for(;0<$n-=$e;)$t*=$n;

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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