Lucas Sequence
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 516: | \[L_{516}\] | 2 × 7 × 23 × 14449 × 131063 × 187209728806728571172807<24> × 126117711915911646784404045944033521<36> × 47790778426343969958962381134866119329<38> |