for num in range ( 10 , 20 ) : #to iterate between 10 to 20
for i in range ( 2 , num) : #to iterate on the factors of the number
if num%i == 0 : #to determine the first factor
j= num/i #to calculate the second factor
print '%d equals %d * %d' % ( num, i, j)
break #to move to the next number, the #first FOR
else : # else part of the loop
print num, 'is a prime number' # your code goes here
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