Question

Which number is prime?
77?
57?
63?
59?

Answer 1

59.
The prime numbers from 1 to 100 are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97. The only number listed on here from your question is 59.

Answer 2

The answer: 59

All of the others have factors