Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 454: | \[{18^{454}-1\over17}\] | 19 × 5903 × 39953 × 12172649 × 18127313 × 45953881 × 1542560380457303<16> × 2272187023861268401<19> × 96503407123053452177<20> × 4497212523300538555189088705457613635628708667498102157253873788940259609099238970017531003445371167646850067798966990409660892405933163705816100339797319495221353900129314014759406547699611455741996985893001440996440648816195484183<232> × 666314987247406938886196762758627848859674094271272569243719837077329777352389977832409922359030326852916086717021446333223795602883337854657924312212978414034677369261882355977648717696095501581565804294485966430254519211909347745305954553408805721419<252> |