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If p is a prime number, for how many values of p is p^2 +21p - 1 also prime?
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If p is a prime number, for how many values of p is p^2 +21p - 1 also prime?
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Jul 16, 2018
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If p is a prime number, for how many values of p is p^2 +21p - 1 also prime?
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Alvaro Lorente
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ugherw;guih4g;/mr5t;
./erbgjkwehjbf.aeh bnjlnbwef erl,jh
BcWeb
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Jul 22, 2018
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BcWeb
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