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>
| 643: | \[L_{643}\] | 1604929 × 64149539 × 11229315067323774191<20> × 71826896464480191731<20> × 2882457732196854617457355013675554069403902883739502525187658025398599843630902979<82> |