$${e\over m_p}=\sqrt{\pi^2{r_p}^2c^3\alpha\epsilon_0\over{2h}}$$
$e=$ elementary electron charge
$m_p=$ proton mass
$r_p=$ proton radius
$c=$ speed of light
$\alpha=$ fine-structure constant
$\epsilon_0=$ permittivity of vacuum
$h=$ Planck's constant
$${e\over m_p}={\pi r_pcq\over{2h}}$$
$e=q=$ elementary charge
Link for Google Calculation of charge to mass ratio of proton
elementary charge / proton mass =
95 788 332.2 s A / kg
(elementary charge)/m_p=
First! (?)
Still first, no one else has this equation.
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