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>
| 517: | \[L_{517}\] | 199 × 2069 × 15511 × 82230919 × 6643838879<10> × 41572941961<11> × 70803992711<11> × 108401152857362041791818479111400173089864244705921344555811<60> |