Base 17 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 89: | \[{17^{89}-1\over16}\] | 179 × 7121 × 10859 × 1391124231325187854601158067<28> × 79943735756244327721739740331<29> × 1313710937719382635079196676302169528587113<43> |