new_contents: n=600851475143
  lastFactor=1
  if n%2==0:
      n=n/2
      lastFactor=2
      while n%2==0:
          n=n/2
  factor=3
  while n>1:
      if n%factor==0:
          n=n/factor
          lastFactory=factor
          while n%factor==0:
              n=n/factor
      factor=factor+2
  print lastFactory
  
subject: Create Problem3.py