/usr/lib/help/factorial is in scheme9 2013.11.26-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | S9 LIB (factorial integer) ==> integer
Compute the factorial of a number.
(factorial 30) ==> 265252859812191058636308480000000
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