Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
142: | \[{3^{142}-1\over2}\] | 22 × 853 × 2131 × 82219 × 3099719989 × 4052490063499<13> × 3754733257489862401973357979128773<34> |