Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 259: | \[{8^{259}-1\over7}\] | 7 × 127 × 223 × 337 × 4663 × 321679 × 6433561 × 26295457 × 319020217 × 616318177 × 2499285769 × 4750535347861726648681<22> × 96786396648673403672115546439<29> × 21234370960880098806027750185552713706866970578963970119<56> × 1396099655816209040897082635430814457429299016552082514363486485025543<70> |