Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 290: | \[{8^{290}-1\over7}\] | 32 × 11 × 31 × 59 × 151 × 233 × 331 × 1103 × 2089 × 4177 × 3033169 × 7060051 × 7553921 × 23476081 × 24578371 × 9857737155463<13> × 96076791871613611<17> × 256582225885581001782477601<27> × 999802854724715300883845411<27> × 2679895157783862814690027494144991<34> × 178137551056208627463817592059032323866951<42> × 5118520748107713872196889605626300465168091691<46> |