Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 81: | \[{5^{81}-1\over4}\] | 19 × 31 × 109 × 271 × 829 × 4159 × 4861 × 31051 × 11419697846380955982026777206637491<35> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 81: | \[{5^{81}-1\over4}\] | 19 × 31 × 109 × 271 × 829 × 4159 × 4861 × 31051 × 11419697846380955982026777206637491<35> |