Base 11 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 69: | \[{11^{69}-1\over10}\] | 7 × 19 × 139 × 829 × 28878847 × 8209475377<10> × 3740221981231<13> × 5283012903770196631383821046101707<34> |