3(2^2+1)(2^4+1)(2^8 +1)+1=(2^2-1)(2^2+1)(2^4+1)(2^8 +1)+1=(2^4-1)(2^4+1)(2^8 +1)+1=(2^8-1)(2^8+1)+1=2^16-1+1=2^16(=65536)
3(2^2+1)(2^4+1)(2^8 +1)+1=3(5+1)(16+1)(256 +1)+1=3×6×17×257+1=78642+1=78643