163

This number is a prime.

Single Curio View:   (Seek other curios for this number)
163 is the only known number m (up to 3*10^10) such that m + 4*n^2 for n = 0, 1, 2, ... , 19 are prime. [Firoozbakht]

Submitted: 2008-10-16 22:00:55;   Last Modified: 2008-10-26 16:21:46.
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell