Base 17 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
57: | \[{17^{57}-1\over16}\] | 229 × 307 × 1103 × 202607147 × 291973723 × 6162410920417<13> × 30211339578587520100541032742977<32> |