There is something else to consider with this that also may impress.Tests have also be run on those digits, just in case. The result is that, as far as we can tell so far, the digits of pi look random, which is to say that they follow no pattern except that of pi itself.
If the numbers were truly random then patterns would actually be present randomly... In other words the digital construction that we see actually appears to be "determined" not to have patterns.
So why would pi seemingly determine a lack of patterns?
Years ago I converted pi into a grey scale image using 0-9 gradient just for fun. 5000 px across by 5000 px down, a total of 25 million placeholders (each pixel being a placeholder) and then compared to a picture created using a quality random number generator. The random generated picture developed discernible yet trivial patterns, were as the pi one didn't.
The fact that the numbers of pi could be claimed to be non-random due to the lack of pattern forming is truly amazing yet perhaps purely circumstantial IMO. ( we humans are great at finding patterns or non-patterns whether they exist or not eh?)