Base 11 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 91: | \[{11^{91}-1\over10}\] | 43 × 1093 × 45319 × 3158528101 × 868721697058567435824108245607127696076153182930226460514053403127306646961<75> |