(2+1)(2²+1)(2^4+1)(2^8+1)(2^16+1)(2^32+1)+1=

(2+1)(2²+1)(2^4+1)(2^8+1)(2^16+1)(2^32+1)+1=

(2+1)(2²+1)(2^4+1)(2^8+1)(2^16+1)(2^32+1)+1
=(2-1)(2+1)(2²+1)(2^4+1)(2^8+1)(2^16+1)(2^32+1)+1
=2^64-1+1=2^64