p-value from the KS test p_KS against number of microlensing light curves. The solid line indicate the median of p_KS distribution with the shade region bounded between the 84th and the 16th percentiles. The fiducial scenario adopts the conventional stellar distribution as microlenses, while the alternative scenario assumes that all the mass in the galaxy is in the form of compact objects, namely, κ_*/κ = 1 (see Fig. 5). Given that Δm_obs and Δm_sim come from the same distribution, p_KS is expected to be 0.5 on average (orange line), regardless of the number of light curves used for this experiment. When Δm_obs and Δm_sim come from different distributions, the median value of p_KS decreases steadily with the sample size, enabling us to distinguish between two scenarios. The horizontal dashed line marks α = 0.05, corresponding to the threshold where the null hypothesis H₀ is rejected with a confidence level of 95%. The blue and green lines represent our results when using disk sizes from continuum reverberation mapping and from the thin disk model, respectively.