Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 156: | \[{19^{156}-1\over18}\] | 23 × 3 × 5 × 73 × 133 × 53 × 79 × 127 × 131 × 157 × 181 × 313 × 599 × 769 × 2341 × 29251 × 176021 × 291331 × 133338869 × 887960971 × 421451911540236097<18> × 2202409598047314333465675421<28> × 92174159182574048847888178637<29> × 1851104143022640252441707536192070544479172296536580102724517<61> |