218

This number is a composite.

+ 218 = 72 + 132. Note that 7 and 13 are the smallest primes for which there is no easy divisibility check in base 10. [Pfannerer]

(There is one curio for this number that has not yet been approved by an editor.)

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