What is a lucky number?

The lucky number "sieve" was developed by the legendary Stanislaw Ulam, who was born and died on the 13th of the month (lucky number) at the age of 75 (lucky number)... and his birth year of 1909 saw the release of a film called The Lucky Number. Just saying! ;)

This video features Dr Ria Symonds from The University of Nottingham.