(2+1)(2^2+1)
=(2-1)(2+1)(2^2+1)
=(2^2-1)(2^2+1)
=2^4-1
(2+1)(2^2+1)(2^4+1)(同样道理在前面加个2-1)
=(2-1)(2+1)(2^2+1)(2^4+1)
=(2^2-1)(2^2+1)(2^4+1)
=(2^4-1)(2^4+1)
=2^8-1
∴(2+1)(2^2+1)(2^4+1)(2^8+1)
=2^16-1
(2+1)(2^2+1)
=(2-1)(2+1)(2^2+1)
=(2^2-1)(2^2+1)
=2^4-1
(2+1)(2^2+1)(2^4+1)(同样道理在前面加个2-1)
=(2-1)(2+1)(2^2+1)(2^4+1)
=(2^2-1)(2^2+1)(2^4+1)
=(2^4-1)(2^4+1)
=2^8-1
∴(2+1)(2^2+1)(2^4+1)(2^8+1)
=2^16-1