Answer:
53, 59, 61
Step-by-step explanation:
A prime number only has 1 factor.
50 is NOT a Prime Number.
51 is NOT a Prime Number.
52 is NOT a Prime Number.
53 is a Prime Number.
54 is NOT a Prime Number.
55 is NOT a Prime Number.
56 is NOT a Prime Number.
57 is NOT a Prime Number.
58 is NOT a Prime Number.
59 is a Prime Number.
60 is NOT a Prime Number.
61 is a Prime Number.
62 is NOT a Prime Number.
63 is NOT a Prime Number.
64 is NOT a Prime Number.
65 is NOT a Prime Number.
