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>
| 400: | \[L_{400}\] | 2207 × 107420801 × 177736001 × 23725145626561<14> × 51793685214662401<17> × 7601587101128729489773008667804801<34> |