Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
83: | \[{19^{83}-1\over18}\] | 167 × 4555750199199950437649290574576123158785621674690043100726048398827989978120480865989375363338094993243<103> |