Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 372: | \[{18^{372}-1\over17}\] | 52 × 73 × 13 × 19 × 229 × 307 × 311 × 373 × 457 × 1427 × 12959 × 52081 × 70619 × 193813 × 1158037 × 48274627 × 89891941 × 423070393 × 4646294881<10> × 1276827537047<13> × 9365578696924149281<19> × 844025609171791028413<21> × 2031563183945918294071<22> × 361794341647699905505399<24> × 1099746040963046723993137<25> × 51124582874452705456885351<26> × 427906142457974033788659934939<30> × 2959904872847999864025894741597935209<37> × 63023759457096932797215924793101340357<38> × 3471894200696111135389552991494069404027039290897662548611522784193<67> × 45293722407512817896780402744247731666953965187247229205664466514537<68> |