Base 6 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 291: | \[{6^{291}-1\over5}\] | 43 × 389 × 1747 × 1586365166597<13> × 18969653181299397175271<23> × 111940600727841600317236399112257<33> × 29579867253585988507046633033646287<35> × 1900581447695608861720541432162196235943188135358020191236919601518484848360439908536086336269936365305819071792172483<118> |