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>
| 2780: | \[L_{2780}\] | 7 × 2161 × 41143 × 1056401 × 45992321 × 3111642881 × 42243409662449<14> × 2244987243573761<16> × 5969158393194038561<19> × 116590239816783239939808689<27> × 766411548020236789542289361<27> × 110997404288165949555811153489845110957222910488403176792045424904031287<72> × 183132004964754480828408719467707883004285472890269545230832754661648702252545150658685699430828812376698642425218115703446995743931398970227081119101117819481642636619215059823858673590144998984972787484587045040454735260457082699834158088464973365241169912654752682609047315693136647772357763722280149661243335057104755830212956539239950196918088168363512797251689700436621921<378> |