  The 4-loop QED mass and wave function renormalization constants $Z_2$ and
$Z_m$ have been evaluated in the on-shell subtraction scheme with 1100 digits
of precision. We also worked out the coefficients of the five color structures
of the QCD renormalization constants $Z_2^{OS}$ and $Z_m^{OS}$ which can
obtained from QED-like diagrams. The results agree with lower precision results
available in the literature. Analytical fits were also obtained for all these
quantities.
