7, 11, 13.
There are 6 prime numbers between 1 and 15: 2 3 5 7 11 13.
It is 1001.
It is 7.
There are 5 prime numbers between 15 and 53, they are 17, 19, 23, 29, and 31.
They are: 5, 7, 11 and 13
5 is but 15 is not a prime number
The Prime Factors of 15 are 3, 5
The prime factors of 15 are 3 and 5 because 3 and 5 are prime numbers that divide evenly into 15. 1 is a factor of 15, but it is not a prime number.
1, 3, 5, 15 3 and 5 are prime.
Prime factors of 15 are 3 and 5.
Three: 7 11 13.
3 and 5 are Prime Factors of 15 (3x5=15).