Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 84: | \[{19^{84}-1\over18}\] | 23 × 3 × 5 × 74 × 132 × 29 × 432 × 127 × 181 × 197 × 701 × 769 × 5237 × 70841 × 226871 × 343393 × 524119 × 2141413 × 30640261 × 68443621 × 1301151937 × 14533200697<11> × 1763028507911581<16> |