Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 122: | \[{7^{122}-1\over6}\] | 23 × 367 × 4759 × 177237331 × 1914662449813727660680530326064591907<37> × 444519128147170444656914672945689439050880209231501<51> |