Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 317: | \[{8^{317}-1\over7}\] | 9511 × 587492521482839879<18> × 4868122671322098041565641<25> × 241459659973825303567826493454039<33> × 1378790948509427717673789094900757220589207<43> × 1271824819271756089692072867669700519167079543<46> × 9815639231755686605031317440031161584572466128599<49> × 24051873260037418695405529344378285529524766471837924485276790039393009<71> |