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 525th sean-niemann 🇺🇸 911 93 9 Jun 2025 527th GolfingSuccess 🇬🇷 910 64 14 Dec 2024 527th MeWhenI 🇻🇦 910 64 24 Dec 2024 529th MeWhenI 🇻🇦 909 63 5 May 2022 530th primo-ppcg 🇹🇭 909 93 7 May 2022 530th AlephSquirrel 909 93 21 Jan 2023 530th kg583 🇺🇸 909 93 26 Dec 2024 530th CLOStrophobic 🇮🇹 909 93 17 Jan 2025 530th edsrzf 🇳🇿 909 93 3 Jul 2025 535th cbrt-x 909 129 6 May 2022 535th piano-miles 909 129 8 Feb 2023 535th lukashert 909 129 7 Jun 2023 535th DialFrost 🇸🇬 909 129 29 Jan 2024 535th bac0id 909 129 29 Jun 2024 535th yoshykai 909 129 27 Mar 2025 541st GrayJoKing 🇦🇺 908 71 10 Aug 2023 542nd edsrzf 🇳🇿 908 72 3 Jul 2025 543rd marshallward 🇺🇸 908 83 10 May 2022 544th ovs-code 🇩🇪 908 84 25 Sep 2022 544th GrayJoKing 🇦🇺 908 84 11 Aug 2023 546th Betuaredead 907 60 5 Jan 2023 546th Yewzir 🇧🇪 907 60 12 Feb 2023 546th Steffan153 🇫🇮 907 60 23 Feb 2023 546th DialFrost 🇸🇬 907 60 30 Jul 2024 546th GolfingSuccess 🇬🇷 907 60 16 Oct 2024 546th sean-niemann 🇺🇸 907 60 7 Mar 2025 552nd Shanethegamer 🇺🇸 907 77 15 May 2023 553rd MeWhenI 🇻🇦 907 110 9 Feb 2023 553rd edsrzf 🇳🇿 907 110 28 Nov 2024 553rd targrik 907 110 30 Jun 2025 556th KrausRaus 🇺🇸 906 59 4 May 2022 556th voytxt 🇨🇿 906 59 4 May 2022 556th KingSkyrock 🇺🇸 906 59 18 May 2022 556th ZakkkkAttackkkk 🇵🇭 906 59 14 Jul 2022 556th aksyristos 906 59 28 Oct 2022 556th nstearns96 🇬🇧 906 59 28 Nov 2022 556th janbehrens 🇩🇪 906 59 17 May 2023 556th Shanethegamer 🇺🇸 906 59 25 May 2023 556th Maznek 906 59 26 Jun 2023 556th SpiritAxolotl 🇺🇸 906 59 20 Mar 2024 556th Andrey-Plotnikov 906 59 19 May 2024 556th emgordon154 906 59 5 Aug 2024 556th duckyluuk 🇳🇱 906 59 3 Oct 2024 556th lifthrasiir 🇰🇷 906 59 23 Nov 2024 556th fuzzylojik-golf 🇺🇸 906 59 1 Jun 2025 556th acollett89 906 59 17 Jun 2025 556th CaedenHarper 🇨🇦 906 59 14 days ago 573rd DialFrost 🇸🇬 906 76 3 Aug 2025 574th m-tkach 🇺🇦 906 90 7 Dec 2023 575th shinh 905 52 29 Jun 2022 576th Lydxn 🇨🇦 905 70 7 May 2022 577th Steffan153 🇫🇮 905 80 15 Nov 2022 577th error256 905 80 8 Apr 2025 579th krcs 🇵🇱 905 86 10 May 2022 579th billings7 🇬🇧 905 86 15 May 2022 579th revlayle 🇺🇸 905 86 7 Dec 2022 579th Widgitty 905 86 1 Sep 2023 583rd nipzu 904 48 8 Sep 2024 584th Lydxn 🇨🇦 904 64 1 Apr 2023 585th MeWhenI 🇻🇦 904 71 20 Aug 2024 586th Shanethegamer 🇺🇸 903 72 4 May 2022 586th jared-hughes 903 72 4 May 2022 586th Waffle3z 903 72 5 May 2022 586th m-tkach 🇺🇦 903 72 16 Oct 2022 586th GrayJoKing 🇦🇺 903 72 22 Oct 2022 586th emplv 🇱🇻 903 72 27 Oct 2022 586th sean-niemann 🇺🇸 903 72 7 Mar 2025 586th Blendi-Goose 903 72 16 Mar 2025 586th edsrzf 🇳🇿 903 72 12 Apr 2025 595th Shanethegamer 🇺🇸 903 82 19 Dec 2023 595th edsrzf 🇳🇿 903 82 6 Jan 2025 597th stefangimmillaro 903 92 24 Oct 2023 597th inverseLorentz 🇦🇺 903 92 27 May 2024 597th sean-niemann 🇺🇸 903 92 8 Jun 2025 600th DialFrost 🇸🇬 902 56 5 days ago Prev 526–600 of 3,318 Next