Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 316: | \[{18^{316}-1\over17}\] | 52 × 13 × 19 × 317 × 338279 × 1104737 × 12802037494726063<17> × 9886837665707422272737<22> × 1735973262881810486884626006469367486329<40> × 185026990267721725625447928330141280148587909<45> × 1824771736962009962008821260930608362080770046711<49> × 3735633632419115668144385885859007488592446776521<49> × 15711715905379982612012445487652618547579630505057<50> × 1924377206372934148739578585713594951030406386928469<52> × 44486810529708483383247632019644441468517142709668798104883<59> |