No. That's real. Here is the HTML from my archive:
https://nofile.io/f/o7mMvVWzkpG/4279775.html
However, there is nothing remarkable about 17 or 23. These are the more common numbers for 4 digits to add up to. It's like when rolling two dice. There is only one way of producing a 2 or 12 (1+1, 6+6) but six ways of rolling a 7. With four digits there is one way to produce a 0 (0000) and one way to produce a 54 (9999), but hundreds for ways to produce the any of numbers in the mid-range between 0 and 54.