[2^2+1]*[2^4+1]*[2^8+1][2^16+1] 乘1/3(2^2-1)=1
=1/3(2^2-1)[2^2+1]*[2^4+1]*[2^8+1][2^16+1]
=1/3(2^4-1)*[2^4+1]*[2^8+1][2^16+1]
=...
=1/3(2^32-1)
[2^2+1]*[2^4+1]*[2^8+1][2^16+1] 乘1/3(2^2-1)=1
=1/3(2^2-1)[2^2+1]*[2^4+1]*[2^8+1][2^16+1]
=1/3(2^4-1)*[2^4+1]*[2^8+1][2^16+1]
=...
=1/3(2^32-1)