Base 16 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 42: | \[{16^{42}-1\over15}\] | 3 × 72 × 13 × 17 × 29 × 43 × 113 × 127 × 241 × 337 × 1429 × 3361 × 5419 × 14449 × 15790321 × 88959882481<11> |