Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 426: | \[{18^{426}-1\over17}\] | 73 × 19 × 307 × 569 × 1279 × 5113 × 228337 × 67967023 × 3091659217 × 27014686057<11> × 171677613761<12> × 23821298356519<14> × 31459011422566939<17> × 1206599617106390561<19> × 12252130703953922311<20> × 8313279867213693856690162577<28> × 464501819303571111904323390523<30> × 99988492874568924239703307744649<32> × 404888252726379587195529885794129<33> × 11360704486867123771415523819277051<35> × 711026614284490554933614980152936022174138556036835920163210871<63> × 11065196185413411986547431295308808463159718695654625728614440772943<68> × 1278301332636121416398315858834922028437160786243943984801416354994970876160723090406241660338169004460924524563199178851<121> |