Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 209: | \[{8^{209}-1\over7}\] | 23 × 89 × 11287 × 32377 × 524287 × 599479 × 1212847 × 12471031 × 89856878697433<14> × 94803416684681<14> × 1512348937147247<16> × 5346950541323960232319657<25> × 8778523027466598416204656058467252273<37> × 36997287511549004440599388408744754230660993087<47> |