Collatz in all languages in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 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 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 Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir F# Factor Forth Fortran Gleam Go GolfScript 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 Erlang Fennel Groovy Harbour Hare Haxe Hush Hy iogii Knight 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 F# Factor Forth Fortran Gleam Go GolfScript 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 Erlang Fennel Groovy Harbour Hare Haxe Hush Hy iogii Knight 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 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 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 Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Bytes Time 524th kg583 🇺🇸 909 93 26 Dec 2024 524th CLOStrophobic 🇮🇹 909 93 17 Jan 2025 524th edsrzf 🇳🇿 909 93 3 Jul 2025 529th cbrt-x 909 129 6 May 2022 529th piano-miles 909 129 8 Feb 2023 529th lukashert 909 129 7 Jun 2023 529th DialFrost 🇸🇬 909 129 29 Jan 2024 529th bac0id 909 129 29 Jun 2024 529th yoshykai 909 129 27 Mar 2025 535th GrayJoKing 🇦🇺 908 71 10 Aug 2023 536th edsrzf 🇳🇿 908 72 3 Jul 2025 537th marshallward 🇺🇸 908 83 10 May 2022 538th ovs-code 🇩🇪 908 84 25 Sep 2022 538th GrayJoKing 🇦🇺 908 84 11 Aug 2023 540th Betuaredead 907 60 5 Jan 2023 540th Yewzir 🇧🇪 907 60 12 Feb 2023 540th Steffan153 🇫🇮 907 60 23 Feb 2023 540th DialFrost 🇸🇬 907 60 30 Jul 2024 540th GolfingSuccess 🇬🇷 907 60 16 Oct 2024 540th sean-niemann 🇺🇸 907 60 7 Mar 2025 546th Shanethegamer 🇺🇸 907 77 15 May 2023 547th KrausRaus 🇺🇸 906 59 4 May 2022 547th voytxt 🇨🇿 906 59 4 May 2022 547th KingSkyrock 🇺🇸 906 59 18 May 2022 547th ZakkkkAttackkkk 🇵🇭 906 59 14 Jul 2022 547th aksyristos 906 59 28 Oct 2022 547th nstearns96 🇬🇧 906 59 28 Nov 2022 547th janbehrens 🇩🇪 906 59 17 May 2023 547th Shanethegamer 🇺🇸 906 59 25 May 2023 547th Maznek 906 59 26 Jun 2023 547th SpiritAxolotl 🇺🇸 906 59 20 Mar 2024 547th Andrey-Plotnikov 906 59 19 May 2024 547th emgordon154 906 59 5 Aug 2024 547th duckyluuk 🇳🇱 906 59 3 Oct 2024 547th lifthrasiir 🇰🇷 906 59 23 Nov 2024 547th fuzzylojik-golf 🇺🇸 906 59 1 Jun 2025 547th acollett89 906 59 17 Jun 2025 547th CaedenHarper 🇨🇦 906 59 3 days ago 564th DialFrost 🇸🇬 906 76 23 days ago 565th m-tkach 🇺🇦 906 90 7 Dec 2023 566th MeWhenI 🇻🇦 906 110 9 Feb 2023 566th edsrzf 🇳🇿 906 110 28 Nov 2024 566th targrik 906 110 30 Jun 2025 569th Steffan153 🇫🇮 905 80 15 Nov 2022 569th error256 905 80 8 Apr 2025 571st krcs 🇵🇱 905 86 10 May 2022 571st billings7 🇬🇧 905 86 15 May 2022 571st revlayle 🇺🇸 905 86 7 Dec 2022 571st Widgitty 905 86 1 Sep 2023 575th nipzu 904 48 8 Sep 2024 576th shinh 904 52 29 Jun 2022 577th Lydxn 🇨🇦 904 64 1 Apr 2023 578th MeWhenI 🇻🇦 904 71 20 Aug 2024 579th Lydxn 🇨🇦 903 70 7 May 2022 580th Shanethegamer 🇺🇸 903 72 4 May 2022 580th jared-hughes 903 72 4 May 2022 580th Waffle3z 903 72 5 May 2022 580th m-tkach 🇺🇦 903 72 16 Oct 2022 580th GrayJoKing 🇦🇺 903 72 22 Oct 2022 580th emplv 🇱🇻 903 72 27 Oct 2022 580th sean-niemann 🇺🇸 903 72 7 Mar 2025 580th Blendi-Goose 903 72 16 Mar 2025 580th edsrzf 🇳🇿 903 72 12 Apr 2025 589th Shanethegamer 🇺🇸 903 82 19 Dec 2023 589th edsrzf 🇳🇿 903 82 6 Jan 2025 591st stefangimmillaro 903 92 24 Oct 2023 591st inverseLorentz 🇦🇺 903 92 27 May 2024 591st sean-niemann 🇺🇸 903 92 8 Jun 2025 594th edsrzf 🇳🇿 902 83 14 Jan 2025 594th kg583 🇺🇸 902 83 14 Feb 2025 596th bwat2 902 130 5 May 2022 596th FlorianCassayre 🇫🇷 902 130 20 Sep 2022 596th Widgitty 902 130 29 May 2023 599th Lydxn 🇨🇦 901 69 12 Sep 2022 599th GrayJoKing 🇦🇺 901 69 12 Sep 2022 Prev 526–600 of 3,281 Next