Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
169: | \[{3^{169}-1\over2}\] | 2029 × 797161 × 163264150141<12> × 814222556753878193601980463083668707558864014894642043902929<60> |