prime(n):
If n <= 1, return False.
If n <= 3, return True.
If n%2 == 0 or n%3 == 0, return False.
Iterate from i = 5 to the sqrt(n):
If n%i == 0 or (n+2)% == 0, return False.
If none, return True.
find_prime_numbers():
Store prime numbers in a list.
Iterate over numbers from 500 to 600 -exclusive-:
If the first digit of the number is '5' and the number is prime, add it to the list.
Return the list.
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