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>
| 1781: | \[L_{1781}\] | 521 × 541721291 × 1689858941150641<16> × 78982487870939058281<20> × 444145000076348295479<21> × 6711262621504957500923640599<28> × 7061761905645524775878500075134587650733277169<46> × 2031188886942005501370358499017356882154777670452072256379289007746786410782235554154509782642788255424613900450754084254022277220104838819043600512365775894486925450005208417924954788846169591351898744676154982375697073134859493729<232> |