Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
98: | \[{15^{98}-1\over14}\] | 24 × 72 × 197 × 883471 × 1743463 × 5706541 × 10164071 × 10678711 × 25036159 × 35549599 × 93589065767<11> × 4175288799599<13> × 1716116764931059<16> × 14675999570738648605387<23> |