Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 289: | \[{8^{289}-1\over7}\] | 103 × 2143 × 11119 × 131071 × 5266159 × 12761663 × 179058312604392742511009<24> × 3320934994356628805321733520790947608989420068445023<52> × 10935039603457223930026068138268212812482601727481911326232229911799266958341862951077343379443162529093392869819337559671165321303898435382582250258622977039<158> |