题目7：找出第10001个质数

mysteri0n

1. #python 2.7.11
   
2. 
   
3. def isprime(num):
   
4.     for i in range(2,int(num**0.5)+1):
   
5.         if num % i == 0:
   
6.             return False
   
7.     return True
   
8. 
   
9. the_10001st = 0
   
10. for i in xrange(2,10**9):
    
11.         the_10001st += isprime(i)
    
12.         if the_10001st ==10001:
    
13.                 print i
    
14.                 break

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