Could it be beneficial to create a specialized compressor for number sequences / mathematical data? For example, if a file contained the string "2468", a compressor could encode that, for example, as "2BC" (where B is +2, and C is 3 iterations). Could this be effective in some cases? Are there any compressors that do this already?
*Btw, I'm a newb at compression. I hope you'll go easy on me if I sound naive.