in reply to Re: Stirling Approx to N! for large Number?
in thread Stirling Approx to N! for large Number?

That formula has an error. It should be 
my $log_nfact =
  $n * (log ($n) - 1) + 0.5 * (log(2*PI*$n + 1/3));

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log(exp(-n)) = -n

-Mark

In Section Seekers of Perl Wisdom