The question starts "Give the sum of the numbers in the set of primes p..." Why not just "find the prime p?" To me, the question asks for more than one prime. Why not put a question in its simplest form?
The whole question is: Give the sum of the numbers in the set of primes p such that p2+11 has exactly six different positive divisors (including 1 and the number itself). (Note the set may have one or more elements.)
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