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>
| 506: | \[L_{506}\] | 3 × 43 × 307 × 4049 × 4969 × 275449 × 5820501809<10> × 52993348627<11> × 23056952302360681<17> × 3584067779910136774717365896253615367627502274728803<52> |