Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 393: | \[{3^{393}-1\over2}\] | 13 × 263 × 2083574227432941258356498327796750385623056105089493677<55> × 605199588591144003100881306574406851660288427740394885828171<60> × 3741247222374828182208251478581570961627187161736862769142116077118157<70> |