Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 116: | \[{18^{116}-1\over17}\] | 52 × 13 × 19 × 59 × 233 × 9049 × 23201 × 5860321 × 874663781 × 1505548068007783<16> × 678538785553421893<18> × 98800490511312118297<20> × 115643571587559007469672309<27> × 2255781524824231358697279947382689<34> |