Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
185: | \[{3^{185}-1\over2}\] | 112 × 2221 × 17761 × 35521 × 146891 × 13097927 × 228082801 × 17189128703<11> × 49804972211<11> × 87841814842081<14> × 1654235911196704741<19> |