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>
| 521: | \[L_{521}\] | 26698303031240509089959<23> × 285809665827656462061359689537471254854679455632852724704875653927701601046927851107589<87> |