Hark! The Herald Angels Sing

Wilson’s Theorem is a test for primality.  It is inefficient for large numbers since factorials () grow very fast.  Nevertheless, it has its uses because of its simplicity. It was conjectured by Wilson and published [more…]

Benford’s Law is a theory of leading digits in numerical data sets. Whilst one might think that the frequency of the leading digit would be equally distributed across the nine digits each with approximately 11% [more…]

Read as : the limit, as approaches infinity, of subfactorial divided by factorial is equal to divided by which approximates to , where is Euler’s number, The Hat Check Problem, as first described by Montmort [more…]