安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- 8 - Wikipedia
8 is a composite number and the first number which is neither prime nor semiprime By Mihăilescu's Theorem, it is the only nonzero perfect power that is one less than another perfect power 8 is the first proper Leyland number of the form x y + y x, where in its case x and y both equal 2
|
|
|