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.
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91 is composite. The others are prime number
The prime factors of 91 are: 7, 13
91 is the only composite factor of 91. 7 and 13 are prime.
The prime factors of 91 are 7 and 13. 13 is a prime number so only has 1 and itself as factors. Therefore the only common factors for 13 and 91 are 1 and 13.
They are: 7 times 13 = 91