This number is a prime.

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

+ The sum of digits of the largest 3-digit prime (997) provides the number of primes less than or equal to the largest 2-digit prime. This is not true for any other tier of n-digit numbers. [Green]

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