Base 11 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 68: | \[{11^{68}-1\over10}\] | 23 × 3 × 61 × 137 × 71707 × 264793 × 2218331 × 2481791513 × 9598959833<10> × 641625222857<12> × 50544702849929377<17> |