13931...13931 (185-digits)

This number is a prime.

13931 3931393139 3139313931 3931393139 3139313931
3931393139 3139313931 3931393139 3139313931 3931393139 3139313931 3931393139
3139313931 3931393139 3139313931 3931393139 3139313931 3931393139 3139313931

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A palindromic prime with all substrings of five consecutive digits forming primes as well. [Patterson]

Submitted: 2004-01-12 13:47:16; Last Modified: 2008-01-30 17:28:00.