Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 265: | \[{3^{265}-1\over2}\] | 112 × 107 × 3181 × 24169 × 3747607031112307667<19> × 18474777940736174884324451<26> × 3449313707942322494318140511<28> × 5754996180616545478239088262898984180906601<43> |