Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 254: | \[{15^{254}-1\over14}\] | 24 × 86869 × 10705339 × 17529557 × 64545260439067<14> × 308295647551539421842623479<27> × 32507777027794399574020508154985901470261<41> × 53079103097574553063805568426775890805467515544031669724935811<62> × 274728041533756987002423480929571398686198870146733976446789519549<66> × 1548994961605274747245409809878991869619400584473439186970930640057859<70> |