Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 118: | \[{15^{118}-1\over14}\] | 24 × 7907 × 565322071603278863<18> × 298157610720691362563759<24> × 587232859318586491409325369440965227015251999<45> × 34273355136165018967113536849036352969191495671<47> |