Question

Why 1 is not a prime number ?

Answer 1

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• The confusion begins with this definition a person might give of “prime”: a prime number is a positive whole number that is only divisible by 1 and itself. The number 1 is divisible by 1, and it's divisible by itself. But itself and 1 are not two distinct factors. ... Excluding 1 from the primes smooths that out.

Answer 2

Answer:

The confusion begins with this definition a person might give of “prime”: a prime number is a positive whole number that is only divisible by 1 and itself. The number 1 is divisible by 1, and it's divisible by itself. But itself and 1 are not two distinct factors. ... Excluding 1 from the primes smooths that out.