def is_prime(num):
    if num < 2:
        return False
    for i in range(2, int(num**0.5) + 1):
        if num % i == 0:
            return False
    return True

prime_numbers = []
for num in range(500, 600):
    if str(num).startswith('5') and is_prime(num):
        prime_numbers.append(num)

print("Prime numbers with 3 digits starting with 5:")
for prime in prime_numbers:
    print(prime)