Why isn't 1 a prime number?

Re:Why isn't 1 a prime number? by amluto on Sunday April 28, 2019 @10:56AM (#19771412)

Surely “product of primes” means “product of one or more primes”.

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Re:Why isn't 1 a prime number? by iamdead on Sunday April 28, 2019 @02:02PM (#19772593)

Product of zero or more primes. Otherwise you cannot factor 1.

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Re:Why isn't 1 a prime number? by globuous on Sunday April 28, 2019 @11:25AM (#19771592)

Yeah, but it also says "in a unique way" and 1 breaks that since it sends any other number to itself under multiplication. So maybe a prime number also has the property that it sends any other number not to itself when multiplied by ? maybe that's already in it ?

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