CODATA/NIST Only Good to 4 Decimal Places

https://physics.nist.gov/cgi-bin/cuu/Value?rp|search_for=Proton+radius

Billions of dollars spent and proton radius only good to 4 decimal places?

Likely only good to three...

Just solve the equation, the full Rydberg equation, for it's roots!

Quanta: What Goes On in a Proton? Quark Math Still Conflicts With Experiments.

https://www.quantamagazine.org/what-goes-on-in-a-proton-quark-math-still-conflicts-with-experiments-20200506/