Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 208: | \[{18^{208}-1\over17}\] | 52 × 132 × 19 × 53 × 79 × 97 × 113 × 131 × 521 × 929 × 1873 × 2081 × 3329 × 7489 × 21997 × 113153 × 15710657 × 113607841 × 4020180841 × 4558459777<10> × 5601346141<10> × 29759719289<11> × 15715445027621<14> × 260800658620746193<18> × 3666313911384869983836065484314196953809<40> × 15876117966668535872017008774601998349105927566044038099406704978500967619302492094097661313<92> |