Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 190: | \[{3^{190}-1\over2}\] | 22 × 112 × 61 × 191 × 1597 × 2851 × 39901 × 101917 × 363889 × 29574984661<11> × 25349956307509384561<20> × 78958087694609321439660131899631<32> |