1732565537257

This number is a prime.

173 2565537257

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The smallest concatenate emirp using all the known primes p of the form 2^n+1 (p = 2, 3, 5, 17, 257, 65537). [Loungrides]

Submitted: 2009-04-03 18:38:13; Last Modified: 2010-07-01 11:48:06.