As of my last update in April 2023, there isnt a LEGO set specifically numbered 5004742 documented in the official LEGO set database or widely recognized LEGO fan communities. LEGO numbers their sets in a sequential manner, and each set number is unique to a particular kit which can range across many themes such as Star Wars, Harry Potter, Technic, LEGO City, and so forth.
Its possible that the number 5004742 is a misprint, a mistaken recollection, or relates to a product thats not categorized under the mainline LEGO sets (it could be a gear, promotional item, or a part of a different inventory system within the LEGO Groups vast product range).
For the most accurate and recent information about LEGO sets, their set numbers, themes, piece counts, and release years, its best to consult the official LEGO website or contact LEGO customer service directly. LEGO also has an extensive online database and a dedicated fan community that might help in identifying set numbers and details.
