Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 40: | \[{15^{40}-1\over14}\] | 26 × 11 × 17 × 31 × 41 × 113 × 1201 × 1489 × 1531 × 4931 × 19421 × 131381 × 133390439104361<15> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 40: | \[{15^{40}-1\over14}\] | 26 × 11 × 17 × 31 × 41 × 113 × 1201 × 1489 × 1531 × 4931 × 19421 × 131381 × 133390439104361<15> |