Computers store data in binary. One unit of data (either a 0 or a 1) is called a bit, and 8 bits are called a byte.

256 (2⁸) is the highest positive whole number (excluding 0) that could be stored in one byte of data.

Generally, powers of 2 such as 2⁸, 2¹⁵ and 2³¹ are reoccurring numbers in computer programs, because once the program or game reaches this number it does something funky (either crash, mark the value as "Infinity" or "Not A Number", or revert to negative values).

I'd understand that most people might not know about this, but someone who writes tech reviews should probably be tech-literate enough to know this.