Base 17 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
66: | \[{17^{66}-1\over16}\] | 2 × 33 × 7 × 13 × 23 × 67 × 199 × 307 × 947 × 991 × 3697 × 48973 × 976669 × 11372329 × 39172453 × 87415373 × 2141993519227<13> × 15814892288119<14> |