Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 418: | \[{18^{418}-1\over17}\] | 192 × 23 × 199 × 419 × 6271 × 6841 × 16127 × 28843 × 51217 × 536801 × 1805761 × 6301307 × 546338123 × 2562845539651<13> × 1168643262069586249<19> × 6089884909802812423<19> × 1961870762757168078553<22> × 5826088996144794331879<22> × 2493875399096185746095517782223323206912793724169416253299712993494511<70> × 84018844627436432254700856326526798733552351635802089600016076151794444990901834083694086186827<95> × 3656424822640651981355430462991365976447480592765917678499532119474066333154151588921666432883737<97> × 78878148724505565186853487902678533973076073503491919540607666592346681558019914541549563973069955409717728388449<113> |