Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 240: | \[{18^{240}-1\over17}\] | 53 × 73 × 11 × 13 × 19 × 31 × 41 × 61 × 97 × 113 × 229 × 241 × 307 × 457 × 601 × 641 × 881 × 929 × 1153 × 2711 × 9041 × 15101 × 15121 × 16921 × 145501 × 547681 × 558721 × 921121 × 2474209 × 113607841 × 7804804801<10> × 11019855601<11> × 11630180251<11> × 42569092513<11> × 495520919281<12> × 137841514501966721<18> × 123493831186918813797388081<27> × 23007113434668367286031526391280991361<38> × 431117813805951239847529546947429571285452488754073146974865204374401<69> |