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>
| 515: | \[L_{515}\] | 11 × 619 × 1031 × 461441 × 1603711 × 5257480026438961<16> × 269351012534200351<18> × 26062085844315556271<20> × 2217915655501541455404733927062827911<37> |