(2+1)(2^2+1)(2^4+1)...(2^32+1) 【2^2是2的2次方,2^4是2的4次方,其他则以此类推】=(2-1)(2+1)(2^2+1)(2^4+1)...(2^32+1)=(2^2-1)(2^2+1)(2^4+1）...（2^32+1)=(2^4-1)(2^4+1)...(2^32+1)=...=(2^32-1)(2^32+1)=2^64...