Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
269: | \[{3^{269}-1\over2}\] | 10223 × 262007 × 116075653 × 76305384036997<14> × 299470647963251<15> × 15597165786807676691920291625641910938974071907958316973148155921390236953578833891<83> |