111211

This number is a prime.

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

+ The first prime (emirp) of form aba, where a, b are successive double-digit numbers. [Loungrides]

+ The first prime formed by inserting a composite number between two double-digit identical adjacent primes is an emirp. [Loungrides]

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