Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 321: | \[{20^{321}-1\over19}\] | 421 × 190568071 × 91228439433259<14> × 112740560139749<15> × 24446635393191083149616814180130429<35> × 172032094957736670443161396409653114394358511<45> × 2532712448923566121530103988251057499783567701628648305451<58> × [25581021394629824422230927265610087189092674267143591965100322873212681134292985977528412063131499363753166375402637747382895935427809725486253949402168218284896201716462728511894650720815718570650837608260148642008386241870103011010115026289<242>] |