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project_euler/Problem 03/sol2.py

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+'''
+Problem:
+The prime factors of 13195 are 5,7,13 and 29. What is the largest prime factor of a given number N?
+e.g. for 10, largest prime factor = 5. For 17, largest prime factor = 17.
+'''
+from __future__ import print_function
+n=int(raw_input())
+prime=1
+i=2
+while(i*i<=n):
+    while(n%i==0):
+        prime=i
+        n/=i
+    i+=1
+if(n>1):
+    prime=n
+print(prime)