(三加一)乘以(三的二次方加一)乘以(三的四次方加一）．．．．．．（三的六十四次方加一）等于
{(3-1)(3+1)(3^2+1)(3^4+1)…（3^64+1）}/(3-1)
={(3^2-1)(3^2+1)(3^4+1)…（3^64+1）}/(3-1)
={(3^4-1)(3^4+1)…（3^64+1）}/(3-1)
={(3^8-1)…（3^64+1）}/(3-1)
=……
={(3^64-1)(3^64+1)}/(3-1)
=(3^128-1)/2