解6(7+1)(7²+1)(7^4+1)(7^8+1)+1=(7-1)(7+1)(7²+1)(7^4+1)(7^8+1)+1=(7²-1)(7²+1)(7^4+1)(7^8+1)+1=(7^4-1)(7^4+1)(7^8+1)+1=(7^8-1)(7^8+1)+1=7^16-1+1=7^16
=48*50*2402*5764802+1=7.975903336704e+16
6(7+1)(7^2+1)(7^4+1)(7^8+1)+1593