97 is a Prime number. 33, 63, and 25 are composites.
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19 and 67 are prime numbers.
43 is the only prime number in that list; 33 and 63 are both divisible by 3.
two prime numbers when added together will equal 63: 2 + 61
3*3*7=63
2 is a prime because it can only be multiplied by 1x6 but 63 isn't