91131416171

This number is a prime.

9 1131416171

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The only prime formed from a digit d, (d=9), followed from the concatenation in order of all the double-digit primes ending with 1, i.e., 11, 31, 41, 61, 71. [Loungrides]

Submitted: 2021-07-20 08:59:23; Last Modified: 2022-01-05 12:41:45.