Base 6 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
218: | \[{6^{218}-1\over5}\] | 7 × 9661979 × 30726149494277<14> × 42855656091880208870012451741752392192104225262820633109434962552795607<71> × 97346908193625617781778470000484678372469642125201050088483502236579895347349<77> |