Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 143: | \[{18^{143}-1\over17}\] | 23 × 79 × 199 × 521 × 16127 × 38039 × 51217 × 1977119 × 24806497 × 29759719289<11> × 1080002298233<13> × 45456394926471841639167439134165631<35> × 44261896455907758584895147529295915429239574374291123631161997294477814694792640847281<86> |