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OpenStudy (anonymous):
How many prime numbers are there between 0 and 23?
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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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