Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 240: | \[{3^{240}-1\over2}\] | 25 × 52 × 7 × 112 × 13 × 17 × 31 × 41 × 61 × 73 × 97 × 193 × 241 × 271 × 577 × 769 × 1181 × 4561 × 4801 × 6481 × 13921 × 14401 × 298801 × 26050081 × 42521761 × 47763361 × 128653413121<12> × 51383579021948491809121<23> |