I am reading about the class number problem. There is a well known complete list of imaginary quadratic fields $\mathbb{Q}(\sqrt{-d})$ with class number $1$.
I found a paper by Stark that says there are exactly 18 such fields with class number $2$. I don't have access.
The comments indicate this was easy to find using Google? The paper he points to was written in 1998. Since I am totally clueless, is it possible to compute this result e.g. using continued fractions?
By Moore's law computing power, say in a smart phone, exceeds what was available to the authors of that paper.
Wikipedia has the Dirichlet Class number formula.
$$ h(d) = \frac{w\sqrt{d}}{2\pi} L(1, \chi) $$
and there is even a formula for $L(1, \chi)$ which nobody seems to understand.