411

This number is a composite.

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If C(n) = the concatenation of the first n primes, P(n) = the product of the first n primes, and S(n) = the sum of the first n primes, then 411 is the smallest n such that C(n) + P(n) + S(n) is prime. Found by Andersen. [Rivera]

Submitted: 2019-11-26 15:47:51; Last Modified: 2019-12-28 22:54:39.