Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 550: | \[{18^{550}-1\over17}\] | 112 × 19 × 23 × 41 × 199 × 3312 × 2711 × 7151 × 9041 × 16127 × 51217 × 536801 × 602401 × 738851 × 6301307 × 11502811 × 50790191 × 142022651 × 6749141521<10> × 185407134001<12> × 277189066001<12> × 515315479801<12> × 6087325413401<13> × 125500908706801<15> × 12909881728770411001<20> × 17254127651933924651<20> × 21162386787273369601<20> × 24079647987394646183428194161<29> × 1110076132729418029953667653232834201<37> × 1010681451210338341000141100473705677151<40> × 87652581093574255556983525634714729674078170145833970415814229274385639877821028540403842737701452307635503702532687772489801<125> × [113370810247788429237771190519816416802436624754881305046349267865587939008823298461785408205252772097806525412778286118430187565003793050601546513480233595429617277097938091951654608193556293018468527195792900136191555383770238136513032117259635316001<252>] |