Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 274: | \[{3^{274}-1\over2}\] | 22 × 4933 × 217629707 × 82093596209179<14> × 706712258201940254667826642673008768387229115048379<51> × 108081809773839995188256800499141543684393035450350551<54> |