Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 390: | \[{18^{390}-1\over17}\] | 73 × 11 × 19 × 31 × 41 × 79 × 131 × 307 × 521 × 601 × 911 × 2081 × 2711 × 3121 × 9041 × 71761 × 140401 × 270271 × 558721 × 23986951 × 2570316451 × 4020180841 × 7424759473<10> × 11630180251<11> × 29759719289<11> × 49919095201<11> × 3242950762090314211<19> × 170258429679493134487<21> × 136411378479356976346325521<27> × 260674349667764744544365521<27> × 72667528832748478581880458571<29> × 1412364383703504438982118048251<31> × 7122627224638909118690351246321<31> × 3178824717763927188000780029407272908162387961573900132734226759053474289652531<79> × 7298714760067274975493016292308651066243741403325579608525753108756026254909660949456623600335577375871<103> |