Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 51: | \[{18^{51}-1\over17}\] | 73 × 17 × 103 × 10413571416962911<17> × 7563707819165039903<19> × 12987756239101305138847<23> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 51: | \[{18^{51}-1\over17}\] | 73 × 17 × 103 × 10413571416962911<17> × 7563707819165039903<19> × 12987756239101305138847<23> |