Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 75: | \[{19^{75}-1\over18}\] | 3 × 31 × 101 × 127 × 151 × 211 × 911 × 1601 × 6451 × 2460181 × 6229677151<10> × 36035657195482151<17> × 164375644290642589501<21> × 1379878520583653811451<22> |