I would like to (preferably without additional packages) be able to add a prefix before all section numbers, but not to subsection or subsubsection numbers. In other words, I want the section numbering to look like: "Prefix 1", "1.1", "1.2", "Prefix 2", "2.1", "2.2", etc.
It would be a nice bonus if I don't need to respecify all of the default settings for the section, and can just specify the prefix text.