Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 42: | \[{15^{42}-1\over14}\] | 24 × 7 × 43 × 211 × 241 × 723031 × 1743463 × 10678711 × 191354311 × 2817034275427<13> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 42: | \[{15^{42}-1\over14}\] | 24 × 7 × 43 × 211 × 241 × 723031 × 1743463 × 10678711 × 191354311 × 2817034275427<13> |