Here's why:
* Technical prefixes: There are many technical prefixes used in specific fields related to pressing, like "hydro-" for hydraulic press, "thermo-" for thermal press, etc.
* General prefixes: There are less common prefixes that can be used with "press" in a more general sense, like "re-", "pre-", "over-", etc.
* New combinations: New prefixes could always be created based on specific needs or contexts.
Therefore, it's impossible to give a definite number of prefixes for "press."
However, if you're looking for specific examples of prefixes used with "press," let me know! I can give you a list based on your needs.