Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 108: | \[{18^{108}-1\over17}\] | 52 × 73 × 13 × 19 × 372 × 73 × 109 × 229 × 307 × 457 × 991 × 2593 × 23761 × 25309 × 34327 × 253369 × 465841 × 771877 × 1464049 × 3711529 × 4464073 × 8640109 × 33388093 × 126001657 × 31865908033<11> × 1234749313729<13> × 1756243511461<13> |