Fibonacci Sequence
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 681: | \[F_{681}\] | 2 × 23609 × 208109513 × 17505440236343865677<20> × 1316534463290847218590097513564513<34> × 7915192391491235383593622394399717<34> × 5219534137983025159078847113619467285727377<43> |