Fibonacci in JavaScript in chars. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Gray Code Decoder Gray Code Encoder Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Gray Code Decoder Gray Code Encoder Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 559th cdanek 688 48 10ms 2 Apr 2018 559th MechaFinch 688 48 11ms 19 Feb 2019 559th TTWNO 688 48 10ms 15 Apr 2019 559th jrburga 688 48 10ms 18 Nov 2019 559th marekMin 688 48 10ms 10 Jun 2020 559th nico-bachner 688 48 9ms 28 Dec 2020 559th LakeThomason 688 48 9ms 1 Jun 2021 559th hymanimy 688 48 10ms 27 Jul 2021 559th delgoodie 688 48 10ms 19 Oct 2021 559th CutOffFrequency 688 48 9ms 31 Oct 2022 559th Weston49 688 48 10ms 11 Dec 2022 559th Baxi-codes 688 48 10ms 25 Dec 2022 559th fkantelberg 688 48 9ms 15 Jul 2023 559th Posandu 688 48 10ms 23 Sep 2023 559th azure-blondon 688 48 13ms 15 Jul 2024 559th abhishekg999 688 48 11ms 21 Sep 2024 559th gigaprofisi 🇺🇸 688 48 9ms 5 Nov 2025 578th ArturLange 673 49 10ms 31 Aug 2018 578th felixpackard 673 49 9ms 16 Mar 2020 578th hvanderdys 673 49 9ms 10 Sep 2020 578th stadamdoki 673 49 11ms 12 Apr 2021 578th cubedhuang 673 49 9ms 23 Mar 2022 578th cmoedk 673 49 9ms 5 Nov 2022 578th Florian-Mt 673 49 10ms 20 Nov 2023 578th SrGalletaEXT 673 49 9ms 22 Jul 2024 578th xShadowBlade 673 49 11ms 24 Nov 2024 578th Charlie85270 673 49 13ms 25 Jun 2025 588th petewritescode 660 50 11ms 14 Dec 2018 588th rzhade3 660 50 10ms 22 May 2020 588th taimanh229 660 50 10ms 31 Dec 2020 588th MichalMarsalek 🇨🇿 660 50 10ms 29 Nov 2021 588th fitzdotlol 🇺🇸 660 50 9ms 18 Feb 2022 588th Bonjour27891 🇻🇳 660 50 13ms 12 Mar 2022 588th jlivas 660 50 10ms 1 Jul 2022 588th tse-jp 🇯🇵 660 50 10ms 30 Nov 2022 588th tuxillator 660 50 10ms 15 Dec 2022 588th lucipas 660 50 11ms 8 May 2024 588th Vexxter9 🇳🇱 660 50 10ms 20 Sep 2024 588th allistersascha 660 50 11ms 11 Oct 2024 588th Dddatt 660 50 10ms 9 Jan 2025 588th Zach1031 660 50 10ms 15 Nov 2025 602nd genius257 647 51 10ms 23 Mar 2018 602nd stanley-c-so 647 51 10ms 4 Oct 2019 602nd Jumprocks1 647 51 10ms 11 Feb 2020 602nd jn-lp 🇺🇦 647 51 10ms 31 Oct 2020 602nd RedstoneTim 647 51 10ms 26 Jun 2021 602nd rdscott-vrsk 647 51 10ms 12 May 2023 602nd Ralac07 🇦🇺 647 51 9ms 18 Apr 2025 609th bobesa 635 52 26ms 16 Oct 2017 609th xen-the 635 52 11ms 10 Oct 2018 609th Caylyn 635 52 9ms 22 Dec 2018 609th joeytwiddle 635 52 54ms 4 Feb 2019 609th phillygogo 635 52 10ms 5 Jun 2019 609th wouterraateland 635 52 11ms 8 Jul 2019 609th pg98 635 52 12ms 4 Sep 2019 609th paavohuhtala 635 52 31ms 4 Jan 2020 609th jankaifer 635 52 38ms 8 Aug 2020 609th lowlighter 635 52 28ms 30 Oct 2020 609th 102 635 52 9ms 18 Nov 2020 609th arrudagates 635 52 26ms 23 Jun 2021 609th teofum 635 52 26ms 8 Mar 2022 609th mamamia5x 635 52 39ms 8 Mar 2024 609th junkondo-jp 635 52 38ms 6 May 2024 609th Sinescape 635 52 12ms 16 Sep 2024 609th shandriy 635 52 25ms 23 Jan 2026 609th RealBen9 🇬🇧 635 52 9ms 10 hours ago 627th johnennewdeeson 623 53 9ms 16 Oct 2017 627th someone12346 623 53 40ms 1 Apr 2018 627th gunnermanx 623 53 10ms 4 Jan 2019 627th frankviktorfrank 623 53 9ms 26 Mar 2019 627th gjbianco 623 53 34ms 27 May 2019 627th dzablo 623 53 25ms 4 Sep 2019 627th adoxography 623 53 27ms 16 Sep 2019 627th quentincaffeino 623 53 28ms 4 Jun 2020 627th jchitel 623 53 26ms 24 Sep 2020 627th ffflorian 623 53 27ms 23 Nov 2020 627th IAmYhvr 623 53 30ms 6 Feb 2021 627th gnlow 🇰🇷 623 53 36ms 15 Feb 2021 627th ForkKILLET 🇨🇳 623 53 26ms 18 Feb 2021 627th 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