A Maass form (of weight 0) of level 1 is a smooth, square-integrable, automorphic eigenform of the Laplace-Beltrami operator $\Delta$ that is invariant under $SL(2,\mathbb{Z})$. The Laplace eigenvalue of a Maass form has the form $\lambda = 1/4 + R^2$, where $R > 0$ is called the spectral parameter.
How they were obtained: Not computed: the digits are decimal strings from the LMFDB, pasted into the script and truncated to a hundred characters. Truncation is sound under this database's convention, in which a written digit string denotes an interval of one unit in its last place, but it is the only thing here that is sound by construction. What bounds the original computation's error is not recorded, and spectral parameters of Maass forms are hard to certify.
