Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
42: | \[{19^{42}-1\over18}\] | 22 × 3 × 5 × 74 × 432 × 127 × 197 × 701 × 70841 × 226871 × 343393 × 524119 × 30640261 × 68443621 |