# 1807537

This number is a prime.

There are 1807537 cases of a prime number and twice its prime index having the same number of digits. Example: 241 and its prime index 53 because 241 and 106 have the same number of digits. [Gaydos]

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