（2+1）*（2平方+1）*（2四次方+1）*（2八次方+1）*（2十六次方+1）
=(2^2-1)(2^2+1)(2^4+1)(2^8+1)(2^16+1)
=(2^4-1)(2^4+1)(2^8+1)(2^16+1)
=(2^8-1)(2^8+1)(2^16+1)
=(2^16-1)(2^16+1)
=2^32 -1
=4292967296-1
=4292967295