13131...13131 (25-digits)

This number is a prime.

13131 3131313131 3131313131

Single Curio View: (Seek other curios for this number)

A prime formed by concatenating thirteen 13's and deleting the last digit. [Avrutin]

Submitted: 2005-07-13 09:40:24; Last Modified: 2008-12-19 03:15:37.