257

This number is a prime.

Just showing those entries submitted by 'Luhn': (Click here to show all)

+ 257 = 28 + 1, (28 + 1)2 - 2 and (((28 + 1)2 - 2)2 - 2) are prime. [Luhn]

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell