Base 17 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 87: | \[{17^{87}-1\over16}\] | 59 × 307 × 523 × 7193 × 8179 × 16879 × 6088087 × 37286983 × 52627759112497<14> × 11658852700685942029849<23> × 5340455877669348272609426509595308057<37> |