Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
127: | \[{15^{127}-1\over14}\] | 17529557 × 64545260439067<14> × 53079103097574553063805568426775890805467515544031669724935811<62> × 274728041533756987002423480929571398686198870146733976446789519549<66> |