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 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 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 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 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 Erlang Fennel 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 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 Erlang Fennel 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 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 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 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 526th MeWhenI 🇻🇦 909 63 5 May 2022 527th primo-ppcg 🇹🇭 909 93 7 May 2022 527th AlephSquirrel 909 93 21 Jan 2023 527th kg583 🇺🇸 909 93 26 Dec 2024 527th CLOStrophobic 🇮🇹 909 93 17 Jan 2025 527th edsrzf 🇳🇿 909 93 3 Jul 2025 532nd cbrt-x 909 129 6 May 2022 532nd piano-miles 909 129 8 Feb 2023 532nd lukashert 909 129 7 Jun 2023 532nd DialFrost 🇸🇬 909 129 29 Jan 2024 532nd bac0id 909 129 29 Jun 2024 532nd yoshykai 909 129 27 Mar 2025 538th GrayJoKing 🇦🇺 908 71 10 Aug 2023 539th edsrzf 🇳🇿 908 72 3 Jul 2025 540th marshallward 🇺🇸 908 83 10 May 2022 541st ovs-code 🇩🇪 908 84 25 Sep 2022 541st GrayJoKing 🇦🇺 908 84 11 Aug 2023 543rd Betuaredead 907 60 5 Jan 2023 543rd Yewzir 🇧🇪 907 60 12 Feb 2023 543rd Steffan153 🇫🇮 907 60 23 Feb 2023 543rd DialFrost 🇸🇬 907 60 30 Jul 2024 543rd GolfingSuccess 🇬🇷 907 60 16 Oct 2024 543rd sean-niemann 🇺🇸 907 60 7 Mar 2025 549th Shanethegamer 🇺🇸 907 77 15 May 2023 550th KrausRaus 🇺🇸 906 59 4 May 2022 550th voytxt 🇨🇿 906 59 4 May 2022 550th KingSkyrock 🇺🇸 906 59 18 May 2022 550th ZakkkkAttackkkk 🇵🇭 906 59 14 Jul 2022 550th aksyristos 906 59 28 Oct 2022 550th nstearns96 🇬🇧 906 59 28 Nov 2022 550th janbehrens 🇩🇪 906 59 17 May 2023 550th Shanethegamer 🇺🇸 906 59 25 May 2023 550th Maznek 906 59 26 Jun 2023 550th SpiritAxolotl 🇺🇸 906 59 20 Mar 2024 550th Andrey-Plotnikov 906 59 19 May 2024 550th emgordon154 906 59 5 Aug 2024 550th duckyluuk 🇳🇱 906 59 3 Oct 2024 550th lifthrasiir 🇰🇷 906 59 23 Nov 2024 550th fuzzylojik-golf 🇺🇸 906 59 1 Jun 2025 550th acollett89 906 59 17 Jun 2025 550th CaedenHarper 🇨🇦 906 59 10 days ago 567th DialFrost 🇸🇬 906 76 3 Aug 2025 568th m-tkach 🇺🇦 906 90 7 Dec 2023 569th MeWhenI 🇻🇦 906 110 9 Feb 2023 569th edsrzf 🇳🇿 906 110 28 Nov 2024 569th targrik 906 110 30 Jun 2025 572nd Steffan153 🇫🇮 905 80 15 Nov 2022 572nd error256 905 80 8 Apr 2025 574th krcs 🇵🇱 905 86 10 May 2022 574th billings7 🇬🇧 905 86 15 May 2022 574th revlayle 🇺🇸 905 86 7 Dec 2022 574th Widgitty 905 86 1 Sep 2023 578th nipzu 904 48 8 Sep 2024 579th shinh 904 52 29 Jun 2022 580th Lydxn 🇨🇦 904 64 1 Apr 2023 581st MeWhenI 🇻🇦 904 71 20 Aug 2024 582nd Lydxn 🇨🇦 903 70 7 May 2022 583rd Shanethegamer 🇺🇸 903 72 4 May 2022 583rd jared-hughes 903 72 4 May 2022 583rd Waffle3z 903 72 5 May 2022 583rd m-tkach 🇺🇦 903 72 16 Oct 2022 583rd GrayJoKing 🇦🇺 903 72 22 Oct 2022 583rd emplv 🇱🇻 903 72 27 Oct 2022 583rd sean-niemann 🇺🇸 903 72 7 Mar 2025 583rd Blendi-Goose 903 72 16 Mar 2025 583rd edsrzf 🇳🇿 903 72 12 Apr 2025 592nd Shanethegamer 🇺🇸 903 82 19 Dec 2023 592nd edsrzf 🇳🇿 903 82 6 Jan 2025 594th stefangimmillaro 903 92 24 Oct 2023 594th inverseLorentz 🇦🇺 903 92 27 May 2024 594th sean-niemann 🇺🇸 903 92 8 Jun 2025 597th DialFrost 🇸🇬 902 56 26 hours ago 598th edsrzf 🇳🇿 902 83 14 Jan 2025 598th kg583 🇺🇸 902 83 14 Feb 2025 600th bwat2 902 130 5 May 2022 Prev 526–600 of 3,292 Next