Question

why is 1 not prime?

Answer 1

the prime number had 2 positive divisor
for example 5 is prime because 5 divide by 1,5
but 1 is not prime because divide by only 1
6 is not prime because dive by 1,2,3,6

Answer 2

doesnt make sense the definite of prime is a number with itself as one as factors and 1 meets that definition.