Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 256: | \[{18^{256}-1\over17}\] | 52 × 13 × 19 × 97 × 113 × 257 × 769 × 929 × 254209 × 475777 × 113607841 × 3930785153 × 30894471809<11> × 13183521051511297<17> × 4944182613719870977<19> × 121934274199167596917341199489<30> × 1100476729530700649095762818795195992676563199854864336075520626038066183169<76> × 725696006448854888453708776743258949473501279877685909103412548833896377843152575870233525080178308106769190133140108902828033<126> |