def is_prime(n):
    """Check if a number is prime."""
    if n <= 1:
        return False
    for i in range(2, int(n**0.5) + 1):
        if n % i == 0:
            return False
    return True

def find_primes_starting_with_5():
    """Find and display all 3-digit prime numbers starting with 5."""
    primes = []
    for number in range(500, 600):
        if is_prime(number):
            primes.append(number)
    return primes

# Run the function and display the results
prime_numbers = find_primes_starting_with_5()
print("3-digit prime numbers starting with 5 are:", prime_numbers)