256 is a positive integer equal to 28 = 223.
It is found commonly in computer science, being the the number of different values expressible in 8 bits (a byte).
This number is equal to 2↓↓4 in down-arrow notation.
It can be named septwo with the -wo series.
It can be named "fzfour" with the fz- prefix, since it is equal to 44.