Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
188: | \[{3^{188}-1\over2}\] | 23 × 5 × 1223 × 16921 × 21997 × 256057 × 5112661 × 96656723 × 563838649753<12> × 1534179947851<13> × 125384283132205265785477849439329<33> |