Base 6 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 289: | \[{6^{289}-1\over5}\] | 239 × 409 × 1123 × 30839 × 671059 × 606329606788978761264759513146230361569<39> × 111601652130666930405574223838130124017657978386549226562364871298756092713186743149988791265952371147866892068989072715833569749259958234730539851380499181710176099387<168> |