Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 39: | \[{31^{39}-1\over30}\] | 3 × 792 × 331 × 13807 × 39703 × 42407 × 2426789 × 7908811 × 175500339130677572941801<24> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 39: | \[{31^{39}-1\over30}\] | 3 × 792 × 331 × 13807 × 39703 × 42407 × 2426789 × 7908811 × 175500339130677572941801<24> |