Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 287: | \[{8^{287}-1\over7}\] | 7 × 127 × 337 × 5167 × 13367 × 3887047 × 164511353 × 17137716527<11> × 177722253954175633<18> × 209530011998277670096922500900062393290897233<45> × 51954390877748655744256192963206220919272895548843817842228913<62> × 5006626876280190496416642758625512424067738181047826160968250705189421057250536688879283251582041<97> |