Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 286: | \[{8^{286}-1\over7}\] | 32 × 23 × 67 × 79 × 89 × 683 × 859 × 2003 × 2731 × 8191 × 20857 × 121369 × 599479 × 724153 × 22366891 × 6156182033<10> × 10425285443<11> × 17286204937<11> × 158822951431<12> × 15500487753323<14> × 5782172113400990737<19> × 1065107717756542892882802586807<31> × 8340357737139637289786276330761<31> × 167833515549285827885461382441449<33> × 185074846248319535013227469188526344689<39> |