Results presented above were computed near the CBS limit but quadruple-ζ basis sets may not be feasible for nanoscale vdW complexes, not only for reasons of cost but also due to numerical linear dependencies that necessitate increasingly tight thresholds as molecular size increases in the presence of diffuse basis functions. Fortunately, CP correction can substantially mitigate the need for large basis sets, according to a comprehensive analysis of CP-corrected DFT calculations, and CP-DFT/double-ζ interaction energies are found to be comparable to DFT/CBS values. Convergence to the DFT/CBS limit is illustrated in Fig. using the S66 data set. The CPcorrected and uncorrected interaction energies approach the CBS limit in opposite directions but CP-corrected results do so more quickly. With CP correction, an augmented double-ζ basis set is sufficient to get within 0.5 kcal/mol of the DFT/CBS limit, whereas in its absence an augmented triple-ζ basis set is needed to obtain a similar result.