2121
This number is a composite.
10^999+2121 is the smallest titanic prime whose sum of
digits is prime. [Sariyar]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell
This number is a composite.
10^999+2121 is the smallest titanic prime whose sum of
digits is prime. [Sariyar]