Base 17 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 97: | \[{17^{97}-1\over16}\] | 389 × 90976939813<11> × 438263590967631109<18> × 65888627940954399173<20> × 13803798418776916198818932565461346902705841274674397535895798620689<68> |