Lucas Sequence
Defined with \(L_0=2\), \(L_1=1\), and \(L_n=L_{n-1}+L_{n-2}\) when \(n\geq2\). Related to the Fibonacci sequence.
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 646: | \[L_{646}\] | 3 × 67 × 63443 × 29134601 × 1007222400415001<16> × 239239841400470008542337241<27> × 22849134432104785508437859561<29> × 495676265119780931060241259197924695363507057440601<51> |