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>
| 520: | \[L_{520}\] | 47 × 1601 × 3041 × 3329 × 106513889 × 325759201 × 44729401601<11> × 1088663430401<13> × 3664070903679134651504147239691801017828556945985573198721<58> |