Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 266: | \[{3^{266}-1\over2}\] | 22 × 547 × 1093 × 1597 × 2851 × 11173 × 101917 × 363889 × 1084483 × 1256610601 × 8757948941961838067<19> × 257513776243156826379279929309507<33> × 295966423763788589324732476512991<33> |