prime.py

def isPrime(n):
  """
  naive prime number checker
  
  return True if `n` is a prime number, False otherwise
  """
  if n < 2:
    return False
  
  for i in range(2, n-1):
    if n % i == 0:
      return False
  return True

# write your prime generator here
def genPrime(n):
  yield None