Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 239: | \[{8^{239}-1\over7}\] | 479 × 1913 × 5737 × 40153 × 176383 × 12417007 × 134000609 × 58392032593<11> × 55009358369431<14> × 7110008717824458123105014279253754096863768062879<49> × 199987538790826996082414586220862745720625115339053303<54> × 348106277055479556523667298997810176594405634823028961<54> |