Not to be confused with 256.
Duocentehexaquinquagesimal is a language by User:Makonede. It is a derivative of Golunar, which itself is a derivative of Unary, which itself is a derivative of BF. It operates in nearly the same way as Golunar, except that the number is given in Base256, or duocentehexaquinquagesimal. This language uses 05AB1E's SBCS and base conversion system to encode programs.
An interpreter in Zsh can be found at Try it Online. The header and footer do all the work, the Duocentehexaquinquagesimal code goes in Code, and the input to the code (if any) goes in Input.
A BF to Duocentehexaquinquagesimal converter in 05AB1E can also be found at Try it Online. BF code goes in Input, and the generated code will be in Output.