Proton rest energy

${}_1{}^1\text{H}$

938.27208816(29)

MeV

Deuteron rest energy

${}_1{}^2\text{D}$

1875.61294257(57)

MeV

Golden mean

$\phi =\frac{\sqrt{5}-1}{2}$

0.61803398874…

-

Silver mean

$\sqrt{2}-1$

0.41421356237…

-