Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 77: | \[{19^{77}-1\over18}\] | 701 × 70841 × 73613 × 104281 × 62060021 × 683565986584949943193098665649843330062157179334638625282436350819956477<72> |