Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 233: | \[{3^{233}-1\over2}\] | 467 × 27599172691870182517<20> × 6354979252162209284471<22> × 38247482016765032274959<23> × 235663554277284144371286817356030779989411991<45> |