Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
65: | \[{19^{65}-1\over18}\] | 151 × 599 × 911 × 29251 × 96851 × 38324521 × 52356721 × 133338869 × 153079681 × 764224739004587705859669872633651<33> |