在(2+1)(2^2+1)(2^4+1)(2^8+1)…(2^64+1)的左边添一个(2-1)
然后上式等于(2-1)(2+1)(2^2+1)(2^4+1)(2^8+1)…(2^64+1)
= (2^2-1)(2^2+1)(2^4+1)(2^8+1)…(2^64+1)
.
= 2^128-1
在(2+1)(2^2+1)(2^4+1)(2^8+1)…(2^64+1)的左边添一个(2-1)
然后上式等于(2-1)(2+1)(2^2+1)(2^4+1)(2^8+1)…(2^64+1)
= (2^2-1)(2^2+1)(2^4+1)(2^8+1)…(2^64+1)
.
= 2^128-1