Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 141: | \[{31^{141}-1\over30}\] | 3 × 331 × 1693 × 36943 × 3128573142495569<16> × 433010935358974054681<21> × 47932062894369771872977<23> × 170942984502845969696543<24> × 773892718948740289245597142031<30> × 119601291432976474939014292378960373786610025808376614886591088073614361342546538750787<87> |