228

This number is a composite.

+ 228 ± 1, 822 ± 1 and (228 + 822) ± 1 are all primes. [Luhn]

(There are 3 curios for this number that have not yet been approved by an editor.)

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