Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 261: | \[{31^{261}-1\over30}\] | 32 × 331 × 349 × 523 × 2437 × 3637 × 10789 × 29581 × 49823 × 81343 × 6226417 × 24589681 × 1482570191 × 11242578713<11> × 19442411479<11> × 189343400041<12> × 202338644001987940129<21> × 1480537408333241006942871103432327233924912298742791<52> × [334325468458483852826209658395857624052769474102561354149571978013737945294560634951342432738736422037531360211212060433337162573806594321818286764743856134422806192298200499187075047461932673922736546088393739434071305654586563<228>] |