Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 115: | \[{18^{115}-1\over17}\] | 41 × 47 × 599 × 2711 × 7468009 × 20801237997245359<17> × 82393874808821351987834521<26> × 3336277510305777441247543696294496479366253454467592530568949945380908802489179473831<85> |