61, 23, 97, 41, 67 yes.
51, 93, 39, no.
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23 and 27 are prime numbers whereas 36 and 39 are composite numbers.
The numbers 23, 29, 31 and 37 are prime.
The prime numbers between 1 and 39 are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, and 37.
Of 23 and 39, only 23 is a prime number.
The prime numbers (factors) of 39 are: 3 and 13
17, 23 and 31 are prime. 39 is not.
17, 23 and 31 are prime. 39 is not.
3 x 13
2,3,5,7,11,13,17,19,23,29,31,37
No 36 & 39 are not prime.
29 is prime but 39 is composite
29, 61, 23, 97, 41, and 67 are prime. 81, 51, 93, 77, and 39 are composite.