Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 166: | \[{3^{166}-1\over2}\] | 22 × 167 × 499 × 997 × 12119 × 2466097 × 1036745531 × 950996059627210897943351<24> × 813201725710097952736361977<27> |