Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 165: | \[{3^{165}-1\over2}\] | 113 × 13 × 23 × 1321 × 3851 × 4561 × 50821 × 2413941289 × 560088668384411<15> × 4183739978746243239852385111562221<34> |