Prime, composite, prime.
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67 is a prime number but 57 and 91 are both composite numbers
57 is a composite number with factors 3 and 19.
No because they are both composite numbers
No. Both 57 and 111 are composite numbers. Factors of 57 are 1, 3, 19 and 57. Factors of 111 are 1, 3, 37 and 111. They share two factors 1 and 3, so they are not relatively prime either.
57 is composite.