Base 27 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 75: | \[{27^{75}-1\over26}\] | 112 × 181 × 601 × 757 × 1621 × 4561 × 8951 × 9601 × 116101 × 391151 × 875701 × 927001 × 2098303812601<13> × 286870274711101<15> × 515009259868501<15> × 119634969443826601<18> |