Base 17 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
54: | \[{17^{54}-1\over16}\] | 2 × 35 × 7 × 13 × 19 × 163 × 307 × 433 × 1423 × 5653 × 24733 × 1270657 × 1313154695584063<16> × 28758863909916435817<20> |