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>
| 505: | \[L_{505}\] | 11 × 809 × 7879 × 8081 × 334302931 × 4674144661<10> × 201062946718741<15> × 1365684787582999721<19> × 130075615656504440731<21> × 109335242750956558857181<24> |