1091
This number is a prime.
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The first occurrence of a sexy quadruplet (p,
p + 6, p + 12, p + 18) of consecutive
emirps: (1091, 1097, 1103, 1109). Note that the end terms
are consecutive invertible primes whose digits are mere
cyclic permutations of each other. [Beedassy]
Submitted: 2010-01-24 13:48:05; Last Modified: 2010-01-24 15:04:52.
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