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>
| 411: | \[L_{411}\] | 22 × 242491 × 541721291 × 104446810724929<15> × 78982487870939058281<20> × 18070186267894449189347092077457768249<38> |