Base 17 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 143: | \[{17^{143}-1\over16}\] | 3719 × 212057 × 2919196853 × 2141993519227<13> × 1655239713420437<16> × 4015436321246808173<19> × 992203637469893893874250612811340616664716613383433<51> × 172950169828025205132143310902700552878124254670061710288623<60> |