Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 148: | \[{15^{148}-1\over14}\] | 25 × 113 × 149 × 223 × 593 × 4441 × 32217011 × 5928049943<10> × 2474070455887<13> × 29645965890637091<17> × 52987400285765657<17> × 582492120825067581276282544339<30> × 16882057614458789568659053197037<32> × 35633663309671050205838163789123961<35> |