4

This number is a composite.

Just showing those entries submitted by 'Poo Sung': (Click here to show all)

In the movie "Die Hard with a Vengeance", Bruce Willis must measure 4 litres of water using two containers one with a capacity of 3 litres and the other with 5 litres. This problem can be solved by the Euclidean algorithm since 3 and 5 are mutually prime. [Poo Sung]

1!¹ +2!² + 3!³ + 4!⁴ is prime. [Poo Sung]