If you bear in mind that known property stating that (a-b)(a+b)=(a^2-b^2) you realise that the first two factors correspond to:(2^4 - 1).Then, we now have only 3 factors:(2^4 - 1).(2^4 + 1).
If you bear in mind that known property stating that (a-b)(a+b)=(a^2-b^2) you realise that the first two factors correspond to:(2^4 - 1).Then, we now have only 3 factors:(2^4 - 1).(2^4 + 1).