code: def prime_check(n):
      """Return True if n is a prime number
      Else return False.
      """
  
      if n <= 1:
          return False
      if n == 2 or n == 3:
          return True
      if n % 2 == 0 or n % 3 == 0:
          return False
      j = 5
      while j * j <= n:
          if n % j == 0 or n % (j + 2) == 0:
              return False
          j += 6
      return True
  
label_desc: Use image node_id 1 for calling a global function with example usage: prime_check(n) and returns: True, False, True, False, False