Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 249: | \[{3^{249}-1\over2}\] | 13 × 167 × 12119 × 1036745531 × 35882730354181<14> × 950996059627210897943351<24> × 34142824805895306910049388733099885392736741124752323542369498869<65> |