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>
| 390: | \[L_{390}\] | 2 × 32 × 41 × 2521 × 3121 × 90481 × 12280217041<11> × 54975368761<11> × 42426476041450801<17> × 212661158362558594566110149801<30> |