Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 43: | \[{18^{43}-1\over17}\] | 431 × 4464951753212028068412713<25> × 28971751902509263440682681<26> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 43: | \[{18^{43}-1\over17}\] | 431 × 4464951753212028068412713<25> × 28971751902509263440682681<26> |