# 241

This number is a prime.

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

241 = (22^2-2)/2. Can you find the next prime of form (*t*^2-2)/2, where *t* is a repdigit of form 2*(10^n-1)/9? [Honaker]

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