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>
331: | \[L_{331}\] | 526291 × 54184296181<11> × 4386848568249611<16> × 11957954590103942275063852978039182929<38> |