Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 30: | \[{19^{30}-1\over18}\] | 22 × 3 × 52 × 73 × 11 × 31 × 61 × 127 × 151 × 211 × 271 × 911 × 2251 × 1081291 × 2460181 |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 30: | \[{19^{30}-1\over18}\] | 22 × 3 × 52 × 73 × 11 × 31 × 61 × 127 × 151 × 211 × 271 × 911 × 2251 × 1081291 × 2460181 |