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Check divisibility (Posted on 2015-09-16) Difficulty: 3 of 5
Find all prime numbers p for which number p^2 +11 has exactly six distinct divisors (counting 1 and itself).

See The Solution Submitted by Ady TZIDON    
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Question re: computer exploration (probable spoiler) | Comment 2 of 5 |
(In reply to computer exploration (probable spoiler) by Charlie)

"It seems that p is the only one that works.

The program finds no other through p almost one million."

What  p ?

  Posted by Ady TZIDON on 2015-09-16 16:40:03
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