Base 11 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 261: | \[{11^{261}-1\over10}\] | 7 × 19 × 523 × 398113 × 1772893 × 54415717 × 252951559910787169<18> × 303309617049998388989376043<27> × 873360172275048609080552096817243827525632861<45> × 19864252986467602941327475561536514877625112981282421400939628042342057<71> × 1788690056155567384617248877970548359199797964603398092845129844124075743996967223335977<88> |