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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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re(3): computer exploration (probable spoiler) Comment 5 of 5 |
(In reply to re(2): computer exploration (probable spoiler) by Charlie)

I knew it.

Have fun.

Edited on September 17, 2015, 10:25 am
  Posted by Ady TZIDON on 2015-09-17 10:23:34

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