Base 17 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 128: | \[{17^{128}-1\over16}\] | 27 × 32 × 5 × 29 × 257 × 769 × 1409 × 18913 × 41761 × 138497 × 165569 × 184417 × 1801601 × 52548582913<11> × 5075110114734021328723863149761<31> × 26322932283994956204030979644111775026565819806572087391187777778930177<71> |