Recent measurements of the proton radius earlier: https://www.nature.com/articles/nature09250
suggest an intriguing coincidence - closely related to Dirac's Large Number Hypothesis, yet more intuitive.
The coincidence has also been noted by some heterodox physicists, see Dirk Freyling’s ‘mass-radius constancy’ (www.ek-theory.com/) and N. Haramein (I do not endorse their theories here).