Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 216: | \[{18^{216}-1\over17}\] | 52 × 73 × 13 × 19 × 372 × 73 × 109 × 113 × 229 × 307 × 433 × 457 × 929 × 991 × 2593 × 3889 × 23761 × 25309 × 34327 × 196993 × 253369 × 293329 × 465841 × 771877 × 1464049 × 3711529 × 4464073 × 8640109 × 33388093 × 126001657 × 11019855601<11> × 31865908033<11> × 1234749313729<13> × 1756243511461<13> × 6672771423562679212753<22> × 16297894989684166066993<23> × 226491010090613984594176243921<30> × 1338258845052393545608356556801<31> |