Base 12 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 213: | \[{12^{213}-1\over11}\] | 157 × 853 × 5113 × 19597 × 668821 × 5938441 × 14726274721<11> × 593597578469053<15> × 37984848524797723599443142193849504165878058073506632204903320475097<68> × 376982239153115966062030976435237942103489453391327900631527021230455355662078424600633460096336832742892611961<111> |