Talk:Repunit 19 is Unique Period Prime with Period 19

It should probably be proved that: The reciprocal of a repunit $R_n$ is of the form:
 * $\dfrac 1 {R_n} = 0 \cdotp \underbrace{\dot 000 \ldots 000}_{n - 1} \dot 9$. --Robkahn131 (talk) 20:59, 11 March 2023 (UTC)