(2+1)*(2^2+1)*(2^4+1)*(2^8+1)*(2^16+1)(2^32+1)+1
=(2-1)(2+1)*(2^2+1)*(2^4+1)*(2^8+1)*(2^16+1)(2^32+1)+1
=(2^2-1)*(2^2+1)*(2^4+1)*(2^8+1)*(2^16+1)*(2^32+1)+1
=(2^4-1))*(2^4+1)*(2^8+1)*(2^16+1)*(2^32+1)+1
=(2^8-1))*(2^8+1)*(2^16+1)*(2^32+1)+1
=(2^16-1)*(2^16+1)*(2^32+1)+1
=(2^32-1)*(2^32+1)+1
=2^64-1+1
=2^64
主要是利用平方差公式