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Check divisibility (Posted on 2015-09-16)

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(2): computer exploration (probable spoiler)

| Comment 4 of 5 |

I could have sworn I had written " = 3" in that sentence. Well I've added it now.

Posted by Charlie on 2015-09-17 07:47:38

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