Question

Can $n^2+1$ be a prime if $n$ is odd? What if $n$ is even?

   Can $n^2+1$ be a prime if $n$ is odd? What if $n$ is even?

Applied Algebra: Codes, Ciphers and Discrete Algorithms

Applied Algebra: Codes, Ciphers and Discrete Algorithms

Darel W. Hardy, Fred… 2nd Edition

Chapter 1, Problem 19

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We need to determine if \( n^2 + 1 \) can be a prime number when \( n \) is odd and when \( n \) is even. Show more…

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Can $n^2+1$ be a prime if $n$ is odd? What if $n$ is even?

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