（a+1）（a^2+1）（a^4+1）`````（a^1024+1），其中a不等於0

（a+1）（a^2+1）（a^4+1）`````（a^1024+1）
=（a+1）（a^2+1）（a^4+1）`````（a^1024+1）（a-1）/（a-1）
=（a^2-1）（a^2+1）（a^4+1）`````（a^1024+1）/（a-1）
=（a^4-1）（a^4+1）`````（a^1024+1）/（a-1）
=（a^8-1）`````（a^1024+1）/（a-1）
=（a^1024-1）`````（a^1024+1）/（a-1）
=（a^2048-1）/（a-1）