Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
90: | \[{15^{90}-1\over14}\] | 24 × 11 × 19 × 31 × 61 × 181 × 211 × 241 × 541 × 739 × 811 × 991 × 1531 × 4931 × 19231 × 21061 × 47701 × 142111 × 2568061 × 39225301 × 138711479680351<15> × 92978587355640205970336221<26> |