Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 121: | \[{19^{121}-1\over18}\] | 3631 × 4357 × 104281 × 242243 × 809491 × 62060021 × 5826560917<10> × 3428390992571161<16> × 73653951106215688253<20> × 13843334517406473243713891<26> × 7282485617590212016546578504741434383328384749971781<52> |