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>
| 309: | \[L_{309}\] | 22 × 619 × 1031 × 1270029990781<13> × 5257480026438961<16> × 2216051880587916003268636813231<31> |