No, they are composite numbers.
The factors of 15 are 1, 3, 5, and 15.
The factors of 33 are 1, 3, 11, and 33.
Prime numbers have two factors: 1 and the number itself, so 15 and 33 cannot be prime.
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Of that group, 19 and 37 are prime.
There are 5 prime numbers between 15 and 53, they are 17, 19, 23, 29, and 31.
No prime numbers can be equal to 33, as 33 is not a prime number. It is divisible by 3. Prime numbers are only divisible by 1 and themselves, and 33 does not meet this criterion.
The prime factors of 33 are 3 x 11.
273, 93, 3, 3The prime numbers are 33