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>
| 691: | \[L_{691}\] | 1458011 × 3536539 × 40456433661106429<17> × 743014076214469208479577183351381<33> × 16601048680475177910584454770489202507484213019523728743755389693031533632178048269<83> |