**N Is a Number**: A Portrait of Paul ErdÅ‘s is a 1993 documentary directed by George Paul Csicsery about the life of mathematician Paul ErdÅ‘s.

Paul ErdÅ‘s (26 March 1913 -- 20 September 1996) was a Hungarian mathematician. ErdÅ‘s published more papers than any other mathematician in history, working with hundreds of collaborators. He worked on problems in combinatorics, graph theory, number theory, classical analysis, approximation theory, set theory, and probability theory. He is also known for his "legendarily eccentric" personality.