Collatz in Haskell in bytes. 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 1st ovs-code 🇩🇪 1,000 61 248ms 5 Aug 2024 2nd xnor-gate 968 63 187ms 20 Jan 2025 3rd Lydxn 🇨🇦 953 64 181ms 1 Apr 2023 4th lynn 938 65 283ms 5 May 2022 4th GrayJoKing 🇦🇺 938 65 250ms 5 May 2022 4th Sakisan 🇧🇪 938 65 178ms 6 May 2022 4th JayXon 🇺🇸 938 65 311ms 17 Oct 2022 4th Steffan153 🇫🇮 938 65 185ms 12 Nov 2022 4th tobeannouncd 938 65 312ms 25 Apr 2025 4th sean-niemann 🇺🇸 938 65 168ms 9 Jun 2025 11th Shanethegamer 🇺🇸 924 66 172ms 4 May 2022 11th scpchicken 🇵🇼 924 66 254ms 5 May 2022 11th sisyphus-ppcg 🇦🇺 924 66 174ms 6 May 2022 11th Natanaelel 🇸🇪 924 66 144ms 15 Jun 2022 11th Z-snails 924 66 254ms 27 Feb 2023 11th Jeremy-Stafford 924 66 258ms 27 Feb 2023 11th alomiF 924 66 293ms 1 Sep 2023 11th btnlq 924 66 145ms 17 Oct 2023 19th Andriamanitra 🇫🇮 910 67 144ms 26 Apr 2023 20th the-zammers 897 68 172ms 2 Oct 2023 21st inverseLorentz 🇦🇺 884 69 156ms 3 Jun 2024 21st CLOStrophobic 🇮🇹 884 69 170ms 28 May 2025 23rd RobertHoeh 871 70 174ms 28 Jan 2024 23rd jamiloBBKing 871 70 159ms 31 Jan 2025 25th Irratix 🇳🇱 859 71 175ms 4 May 2022 25th christianlegge 859 71 158ms 28 Jul 2022 25th jtnuttall 859 71 155ms 4 Oct 2022 25th cake287 859 71 154ms 15 Jan 2023 25th VictorFordham 859 71 157ms 30 Sep 2023 25th epic-programmer-guy 859 71 161ms 19 Feb 2024 25th kejcao 🇨🇦 859 71 155ms 10 May 2024 25th cefqrn 859 71 155ms 26 May 2024 25th snoozingnewt 🇨🇦 859 71 158ms 2 Jun 2024 25th DialFrost 🇸🇬 859 71 165ms 6 Aug 2024 35th Innf107 847 72 152ms 12 Nov 2022 35th eskildam 847 72 148ms 27 Nov 2022 35th strout 847 72 155ms 14 Dec 2023 35th HolmDev 847 72 152ms 10 Sep 2025 39th MeWhenI 🇻🇦 824 74 156ms 22 Mar 2024 40th annaproxy 813 75 144ms 5 May 2022 40th HallMatthew314 813 75 158ms 14 Sep 2022 40th exodrifter 🇺🇸 813 75 159ms 25 Oct 2022 43rd yzhs 🇩🇪 792 77 160ms 24 Jun 2023 43rd brimstonetrader 792 77 150ms 15 Jan 2024 43rd heanyang1 792 77 174ms 27 Mar 2025 46th ze-h 🇺🇸 782 78 164ms 13 Jul 2022 47th cbrt-x 772 79 149ms 19 Sep 2023 48th El-PowerPtr 735 83 159ms 22 Aug 2025 48th albanian-laundromat 735 83 172ms 4 Oct 2025 50th aDwarfNamedUrist 709 86 148ms 12 Dec 2022 51st zbreit 🇺🇸 693 88 169ms 25 Jun 2023 52nd GuilhermeRodriguesEras 670 91 154ms 16 Aug 2023 53rd Awsute 656 93 176ms 11 Nov 2022 53rd LHLaurini 🇧🇷 656 93 176ms 26 Jun 2024 53rd jtaxen 656 93 162ms 15 Jul 2024 56th saitouena 649 94 153ms 18 Sep 2022 57th elttil 635 96 151ms 14 Jun 2024 58th Ibozz91 622 98 190ms 18 days ago 59th PanKarapas 616 99 161ms 20 May 2023 60th madeforlosers 565 108 222ms 9 Dec 2024 61st Widgitty 555 110 162ms 21 May 2023 62nd glassala 500 122 161ms 25 Oct 2024 63rd wearsunscreen 480 127 172ms 19 Oct 2023 64th Siri-chan 436 140 165ms 29 Dec 2022 65th ninjawarrior1337 401 152 153ms 1 Feb 2024 66th KatieLG 🇬🇧 14 4,237 124ms 4 May 2022 66th retrohun 14 4,237 114ms 27 Dec 2022 66th KatieLG-Transpiler 🇬🇧 14 4,237 119ms 14 May 2023 66th HumanoidCPU 14 4,237 107ms 20 May 2024 66th Mabeloid 🇳🇴 14 4,237 109ms 17 Sep 2024 66th CaedenHarper 🇨🇦 14 4,237 109ms 25 Jan 2025 1–71 of 71