I'm not sure what a senior thesis is but my undergraduate thesis was I think 34 pages long. (Excluding the source code listing) I had a friend who's advisor ma

I'm not sure what a senior thesis is but my undergraduate thesis was I think 34 pages long. (Excluding the source code listing) I had a friend who's advisor made them make everything longer the way you describe, theirs was in excess of 100 pages. (IIRC this advisor had suggested that while the guidelines say ~50 pages this was the bare minimum sufficient for a pass). I guess it depends a lot on your advisor.