91 is composite. The others are Prime number
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Of the numbers in your question, three are prime, and one is composite. The three prime numbers are 13, 37, and 101, and the composite number is 91. 91 is equal to 13 x 7.
3367 is a composite number. Its prime factors are 7, 13, 37
5291 is not prime. 5291 = 11 * 13 * 37
51 is composite.
37 is a prime number but 42 is a composite number