Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 381: | \[{15^{381}-1\over14}\] | 241 × 2287 × 3049 × 686563 × 17529557 × 64545260439067<14> × 842292641608048903<18> × 53079103097574553063805568426775890805467515544031669724935811<62> × 274728041533756987002423480929571398686198870146733976446789519549<66> × [54902960977712886462106467133893121233215839631200578419897353205335752131172130331341164237678488619785558272953951350965458746974047172410557986500065019937424146896742496149949281568786560891946410160461729055527405950243353589242887992037749738382334849864884123<266>] |