The task is "minimum simple divider"

I just started to study Python on the Sirius platform. I was able to solve all other problems from the topic & laquo; While & raquo;, besides one task that does not allow me to go on the following topics. The task & laquo; the minimum simple divisor of the number & raquo;.

Condition: gives an integer that is no less than 2. Bring its smallest simple divisor. You can not use additional libraries (math, etc.)!

Input data: The whole positive number of n & lt; = 2*10 in the 9th degree.

Output: display the response to the task.

tried Decide by writing a code with While, but my answer is not counted, due to the program for too long. It is recommended that you organize a cycle that sorting out the dividers to the root from the n: While I*i & Lt; = N: , but I can’t understand how to do it.

my code Python (issues an error & laquo; the program was executed for too long and was interrupted & raquo; or & laquo; program; gives an error in the process of execution & raquo;):

  n =  int  ( input  ()) i =  2    when  i & lt; = n:   if%i! =  0 :  i +=  1    print  (i)     
 I can not understand what the error is?