Base 12 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 173: | \[{12^{173}-1\over11}\] | 347 × 6229 × 178537 × 16520618724247316579377<23> × 133631610959030020559251207363442895201402950558413165227170111<63> × 532784191494315471504495678453507199648496037932078360378523339804089982454825476659675773<90> |