Fibonacci Sequence
Defined with \(F_0=0\), \(F_1=1\), and \(F_n=F_{n-1}+F_{n-2}\) when \(n\geq2\).
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 261: | \[F_{261}\] | 2 × 17 × 173 × 2089 × 20357 × 36017 × 40193 × 322073 × 514229 × 3821263937 × 6857029027549<13> |