yes, 5 is a prime factor of both 35 and 65
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No 65 is not prime since it has factors of 1 and 65 or 1*65=65 and 5 and 13 or 5*13=65. Prime numbers have only 1 and that number as its factors.
1, 5, 13, 65 5 and 13 are prime.
factors: 1, 5, 7, 13, 35, 65, 91, 455prime factors: 5, 7, 13
65 = 5*13
35 is not a prime number. It has factors of 1, 5, 7 and 35.