413129

This number is a prime.

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The only prime formed from the reverse concatenation of three primes, 41, 31, 29, of form pq+rs, where p, q, r, s are four consecutive primes, case (2, 3, 5, 7), i.e., 41=2*3+5*7, 31=2*5+3*7, 29=2*7+3*5. [Loungrides]