(2+1)(2²+1)(2四次方+1)(2八次方+1)+1=(2-1)(2+1)(2²+1)(2四次方+1)(2八次方+1)+1=(2²-1)(2²+1)(2四次方+1)(2八次方+1)+1=(2四次方-1)(2四次方+1)(2八次方+1)+1=(2八次方-1)(2八次方+1)+1=2十六次方-1+1=2十六次方