This number is a composite.

Single Curio View:   (Seek other curios for this number)
Regular nonagon is the only regular polygon such that n^n +(n-2)*180/n (387420629) and ((n-2)*180/n)^n+n (20661046784000000009) are both prime. Note that (n-2)*180/n is an internal angel of a regular polygon. [Sariyar]

Submitted: 2019-04-18 07:57:08;   Last Modified: 2019-04-18 09:04:53.
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell