3 x 17 = 51. It has factors other than 1 and itself. It is composite.
61 is prime. Its only factors are 1 and 61.
71 is prime. Its only factors are 1 and 71.
7 x 13 = 91. It is a composite number.
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61 and 71 are prime numbers the rest are composite numbers
The prime numbers between 51 and 80 are: 53, 59, 61, 67, 71, 73 and 79
number of prime numbers between 51 and 101 = 10prime numbers between 51 and 101 = 53, 59, 61, 67, 71, 73, 79, 83, 80, 97
The prime numbers between 50 and 75 are 53, 59, 61, 67, 71, and 73.53 59 61 67 71 73.
They are: 67, 71, 73, 79