17 is a prime number. 8 and 12 are not prime numbers.
3 x 5 = 15, so 15 is not a prime number.
17
17
17... and 19 !
Number 17 is but 15 isn't as 5x3 isn't a prime number
17 is a prime number. 8 and 12 are not prime numbers.
17
3 x 5 = 15, so 15 is not a prime number.
17
17 is a prime number because its only factors are 1 and itself. The definition of a prime number is a natural number with no natural factors aside from 1 and itself. 17's only factors are 1 and 17 (itself), and therefore is a prime number.
17/12 = 15/12
15 is composite number 17, 19 and 23 are prime numbers.
Even number bigger than two are never prime so cross them out, leaving11,13,15,17,19Any number ending in 5 is divisible by 5 and so can not be prime,This leaves 11,13,17,19 which all could be prime and actually are.
17
17... and 19 !
If you mean: 12 13 15 17 27 and 29 then the prime numbers are 13 17 and 29