411
This number is a composite.
Just showing those entries submitted by 'Rivera': (Click here to show all)
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]
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