Base 11 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 128: | \[{11^{128}-1\over10}\] | 28 × 3 × 17 × 61 × 193 × 257 × 7321 × 51329 × 6304673 × 447600088289<12> × 316955440822738177<18> × 21283620033217629539178799361<29> × 7032401262704707649518767703756385761576062060673<49> |