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 523rd DialFrost 🇸🇬 909 129 29 Jan 2024 523rd bac0id 909 129 29 Jun 2024 523rd yoshykai 909 129 27 Mar 2025 529th GrayJoKing 🇦🇺 908 71 10 Aug 2023 530th edsrzf 🇳🇿 908 72 3 Jul 2025 531st ovs-code 🇩🇪 908 84 25 Sep 2022 531st GrayJoKing 🇦🇺 908 84 11 Aug 2023 533rd Betuaredead 907 60 5 Jan 2023 533rd Yewzir 🇧🇪 907 60 12 Feb 2023 533rd Steffan153 🇫🇮 907 60 23 Feb 2023 533rd DialFrost 🇸🇬 907 60 30 Jul 2024 533rd GolfingSuccess 🇬🇷 907 60 16 Oct 2024 533rd sean-niemann 🇺🇸 907 60 7 Mar 2025 539th MeWhenI 🇻🇦 907 63 5 May 2022 540th Shanethegamer 🇺🇸 907 77 15 May 2023 541st marshallward 🇺🇸 907 83 10 May 2022 542nd KrausRaus 🇺🇸 906 59 4 May 2022 542nd voytxt 🇨🇿 906 59 4 May 2022 542nd KingSkyrock 🇺🇸 906 59 18 May 2022 542nd ZakkkkAttackkkk 🇵🇭 906 59 14 Jul 2022 542nd aksyristos 906 59 28 Oct 2022 542nd nstearns96 🇬🇧 906 59 28 Nov 2022 542nd janbehrens 🇩🇪 906 59 17 May 2023 542nd Shanethegamer 🇺🇸 906 59 25 May 2023 542nd Maznek 906 59 26 Jun 2023 542nd SpiritAxolotl 🇺🇸 906 59 20 Mar 2024 542nd Andrey-Plotnikov 906 59 19 May 2024 542nd emgordon154 906 59 5 Aug 2024 542nd duckyluuk 🇳🇱 906 59 3 Oct 2024 542nd lifthrasiir 🇰🇷 906 59 23 Nov 2024 542nd fuzzylojik-golf 🇺🇸 906 59 1 Jun 2025 542nd acollett89 906 59 17 Jun 2025 558th DialFrost 🇸🇬 906 76 14 days ago 559th m-tkach 🇺🇦 906 90 7 Dec 2023 560th MeWhenI 🇻🇦 906 110 9 Feb 2023 560th edsrzf 🇳🇿 906 110 28 Nov 2024 560th targrik 906 110 30 Jun 2025 563rd Steffan153 🇫🇮 905 80 15 Nov 2022 563rd error256 905 80 8 Apr 2025 565th krcs 🇵🇱 905 86 10 May 2022 565th billings7 🇬🇧 905 86 15 May 2022 565th revlayle 🇺🇸 905 86 7 Dec 2022 565th Widgitty 905 86 1 Sep 2023 569th nipzu 904 48 8 Sep 2024 570th shinh 904 52 29 Jun 2022 570th pardouin 🇫🇷 904 52 12 Apr 2025 572nd Lydxn 🇨🇦 904 64 1 Apr 2023 573rd MeWhenI 🇻🇦 904 71 20 Aug 2024 574th Lydxn 🇨🇦 903 70 7 May 2022 575th Shanethegamer 🇺🇸 903 72 4 May 2022 575th jared-hughes 903 72 4 May 2022 575th Waffle3z 903 72 5 May 2022 575th m-tkach 🇺🇦 903 72 16 Oct 2022 575th GrayJoKing 🇦🇺 903 72 22 Oct 2022 575th emplv 🇱🇻 903 72 27 Oct 2022 575th sean-niemann 🇺🇸 903 72 7 Mar 2025 575th Blendi-Goose 903 72 16 Mar 2025 575th edsrzf 🇳🇿 903 72 12 Apr 2025 584th Shanethegamer 🇺🇸 903 82 19 Dec 2023 584th edsrzf 🇳🇿 903 82 6 Jan 2025 586th stefangimmillaro 903 92 24 Oct 2023 586th inverseLorentz 🇦🇺 903 92 27 May 2024 586th sean-niemann 🇺🇸 903 92 8 Jun 2025 589th edsrzf 🇳🇿 902 83 14 Jan 2025 589th kg583 🇺🇸 902 83 14 Feb 2025 591st bwat2 902 130 5 May 2022 591st FlorianCassayre 🇫🇷 902 130 20 Sep 2022 591st Widgitty 902 130 29 May 2023 594th Lydxn 🇨🇦 901 69 12 Sep 2022 594th GrayJoKing 🇦🇺 901 69 12 Sep 2022 594th btnlq 901 69 24 Sep 2022 597th Steffan153 🇫🇮 901 82 1 Apr 2023 597th sean-niemann 🇺🇸 901 82 12 Jul 2024 599th michael-pruglo 🇺🇦 901 94 5 Jul 2022 599th zygoloid 901 94 5 Aug 2024 Prev 526–600 of 3,269 Next