This number is a composite.

+ The first four digits in the decimal expansion of the golden ratio (1618) is a Mersenne prime when turned upside down. [Wu]

+ The smallest factor of 1618! + 1 is 1618 + 1 or 1619, which is prime. Note that 1618 are the digits of Phi. [Gregor]

Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell