Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 283: | \[{3^{283}-1\over2}\] | 133227911 × 1830824353 × 306487563493<12> × 1257602943398454563<19> × 5637503043463711302785197075523227977754476479417792282366672851461413293171897240803829<88> |