1201

This number is a prime.

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The smallest half-quartan emirp, i.e., 1201 = (1^4+7^4)/2. [Loungrides]

The smallest prime p, (emirp), such that (p+1)/2, (p+2)/3 and (p+4)/5 are all primes, i.e. 601, 401, 241. Note that a concatenation of these primes, i.e., 601241401, is also prime. [Loungrides]