def primes(limit): primes = [2] i = 3 while len(primes) < limit: is_prime = True for p in primes: if i % p == 0: is_prime = False break if is_prime: primes.append(i) i = i + 2 return primes if __name__ == '__main__': print '6th Prime', primes(6)[-1] print '10001st Prime', primes(10001)[-1]