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>
| 1685: | \[L_{1685}\] | 11 × 3371 × 21569 × 2709481 × 340819559 × 3836054055641<13> × 28266533338365254946150143843506572731<38> × 3651575156022459933890370204120436853816552382514920496951<58> × 687457005142606038095857508364617812465457734167997065960493504572933409083762518317342886530520651<99> × 69326408231500647999778392941375576232460047678992791931150331063266539767717004040832920060202192102414246843219249956011<122> |