123638027
This number is a prime.
123638027 is a minimal prime P such that P.Q^2.RP (dot is for concatenation) is prime for Q = 2, 3, 5, 7, 11 and 13.
RP = reversal(P): 1236380274720836321, 1236380279720836321, 12363802725720836321, 12363802749720836321,
123638027121720836321, 123638027169720836321. [Rivera]
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