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Mathematics 13 Online
OpenStudy (anonymous):

How many prime numbers are there between 0 and 23?

OpenStudy (anonymous):

2 3 5 7 11 13 17 19 23

OpenStudy (anonymous):

Why 1 is not a prime number?

OpenStudy (osanseviero):

Because the definition of a prime number is the following: "An integer greater than one is called a prime number if its only positive divisors (factors) are one and itself. " Thats what a prime number is, then 1 cant be one of them

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