Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 266: | \[{18^{266}-1\over17}\] | 192 × 449 × 6841 × 80207 × 204023 × 334363 × 22647241 × 32222107 × 49070090119<11> × 6089884909802812423<19> × 1961870762757168078553<22> × 3522349102008270555071<22> × 28421443006771760661619<23> × 2456720450029173606256217<25> × 167761217037156533508446324414388295070095871464426437198389183961017684982814335851<84> × 4387966312585055506457903642949218117592894048635384330976913719069934194657675119164757257<91> |