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>
| 1689: | \[L_{1689}\] | 22 × 28151 × 129491 × 168901 × 172824950663719<15> × 230750016941089<15> × 7116969960760158043281476708611<31> × 193075887142802596034885531645832319<36> × 912609273275578867774052999690178123975991<42> × 33295275300767146404804436892196901456274491200700301110463576768328123518384901289<83> × 23294849873126486124300394588263114998120309277596992404877572291576945089275240655832504672074621022443245587186586639<119> |