2 Fig. . DLPNO errors for polybenzenoid dimers of increasing size, computed at the RI-MP2/cc-pVDZ level using various PNO thresholds. thresholds, which is interesting because both approaches use the same value of T CutPNO but a 2× more conservative value of T CutDO in the tight-CCSD(T) case; see Table . Although T CutPNO is generally viewed as the main PNO threshold, 94 other thresholds may assume more importance in large systems.