Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 285: | \[{8^{285}-1\over7}\] | 31 × 73 × 151 × 191 × 631 × 23311 × 32377 × 524287 × 1212847 × 93507247 × 420778751 × 30327152671<11> × 709018264240844065111<21> × 1491477035689218775711<22> × 25349242986637720573561<23> × 3042645634792541312037847<25> × 158362232618940822526398920291451047671<39> × 112662327875512312448286206338953839918447853551167124756114011227377881<72> |