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>
401: | \[L_{401}\] | 1775629 × 6238759 × 57490131422237119538947323064108369354763411739839193426140731363438441<71> |