Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 42: | \[{18^{42}-1\over17}\] | 74 × 19 × 43 × 307 × 449 × 46747 × 80207 × 32222107 × 607371619 × 156107192084257<15> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 42: | \[{18^{42}-1\over17}\] | 74 × 19 × 43 × 307 × 449 × 46747 × 80207 × 32222107 × 607371619 × 156107192084257<15> |