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 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 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 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 NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi 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 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 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 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 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 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 NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 526th GrayJoKing 🇦🇺 911 71 289ms 10 Aug 2023 527th GolfingSuccess 🇬🇷 910 64 91ms 14 Dec 2024 527th MeWhenI 🇻🇦 910 64 83ms 24 Dec 2024 529th MeWhenI 🇻🇦 909 63 256ms 5 May 2022 530th Shanethegamer 🇺🇸 909 77 13ms 15 May 2023 531st marshallward 🇺🇸 909 83 46ms 10 May 2022 532nd primo-ppcg 🇹🇭 909 93 42ms 7 May 2022 532nd AlephSquirrel 909 93 30ms 21 Jan 2023 532nd kg583 🇺🇸 909 93 32ms 26 Dec 2024 532nd CLOStrophobic 🇮🇹 909 93 31ms 17 Jan 2025 532nd edsrzf 🇳🇿 909 93 30ms 3 Jul 2025 537th edsrzf 🇳🇿 908 72 129ms 3 Jul 2025 538th DialFrost 🇸🇬 908 76 198ms 3 Aug 2025 539th ovs-code 🇩🇪 908 84 72ms 25 Sep 2022 539th GrayJoKing 🇦🇺 908 84 95ms 11 Aug 2023 541st m-tkach 🇺🇦 908 90 31ms 7 Dec 2023 542nd KrausRaus 🇺🇸 907 59 11ms 4 May 2022 542nd voytxt 🇨🇿 907 59 15ms 4 May 2022 542nd KingSkyrock 🇺🇸 907 59 11ms 18 May 2022 542nd ZakkkkAttackkkk 🇵🇭 907 59 10ms 14 Jul 2022 542nd aksyristos 907 59 10ms 28 Oct 2022 542nd nstearns96 🇬🇧 907 59 11ms 28 Nov 2022 542nd janbehrens 🇩🇪 907 59 13ms 17 May 2023 542nd Shanethegamer 🇺🇸 907 59 11ms 25 May 2023 542nd Maznek 907 59 10ms 26 Jun 2023 542nd SpiritAxolotl 🇺🇸 907 59 14ms 20 Mar 2024 542nd Andrey-Plotnikov 907 59 10ms 19 May 2024 542nd emgordon154 907 59 11ms 5 Aug 2024 542nd duckyluuk 🇳🇱 907 59 9ms 3 Oct 2024 542nd lifthrasiir 🇰🇷 907 59 11ms 23 Nov 2024 542nd fuzzylojik-golf 🇺🇸 907 59 13ms 1 Jun 2025 542nd acollett89 907 59 11ms 17 Jun 2025 542nd iczelia 🇩🇪 907 59 12ms 23 Sep 2025 559th Betuaredead 907 60 6ms 5 Jan 2023 559th Yewzir 🇧🇪 907 60 5ms 12 Feb 2023 559th Steffan153 🇫🇮 907 60 5ms 23 Feb 2023 559th DialFrost 🇸🇬 907 60 5ms 30 Jul 2024 559th GolfingSuccess 🇬🇷 907 60 5ms 16 Oct 2024 559th sean-niemann 🇺🇸 907 60 12ms 7 Mar 2025 565th nipzu 906 48 55ms 8 Sep 2024 566th albanian-laundromat 906 55 965ms 22 Sep 2025 567th Steffan153 🇫🇮 906 80 40ms 15 Nov 2022 567th error256 906 80 130ms 8 Apr 2025 569th krcs 🇵🇱 906 86 325ms 10 May 2022 569th billings7 🇬🇧 906 86 411ms 15 May 2022 569th revlayle 🇺🇸 906 86 353ms 7 Dec 2022 569th Widgitty 906 86 356ms 1 Sep 2023 569th albanian-laundromat 906 86 319ms 30 Sep 2025 574th shinh 905 52 42ms 29 Jun 2022 575th Lydxn 🇨🇦 905 64 199ms 1 Apr 2023 576th Lydxn 🇨🇦 905 70 105ms 7 May 2022 577th MeWhenI 🇻🇦 905 71 102ms 20 Aug 2024 578th Shanethegamer 🇺🇸 905 82 19ms 19 Dec 2023 578th edsrzf 🇳🇿 905 82 19ms 6 Jan 2025 580th edsrzf 🇳🇿 905 83 41ms 14 Jan 2025 580th kg583 🇺🇸 905 83 39ms 14 Feb 2025 582nd Shanethegamer 🇺🇸 904 72 4ms 4 May 2022 582nd jared-hughes 904 72 4ms 4 May 2022 582nd Waffle3z 904 72 7ms 5 May 2022 582nd m-tkach 🇺🇦 904 72 130ms 16 Oct 2022 582nd GrayJoKing 🇦🇺 904 72 115ms 22 Oct 2022 582nd emplv 🇱🇻 904 72 107ms 27 Oct 2022 582nd sean-niemann 🇺🇸 904 72 112ms 7 Mar 2025 582nd Blendi-Goose 904 72 6ms 16 Mar 2025 582nd edsrzf 🇳🇿 904 72 5ms 12 Apr 2025 582nd sean-niemann 🇺🇸 904 72 6ms 20 days ago 592nd Steffan153 🇫🇮 903 82 44ms 1 Apr 2023 592nd sean-niemann 🇺🇸 903 82 43ms 12 Jul 2024 594th stefangimmillaro 903 92 123ms 24 Oct 2023 594th inverseLorentz 🇦🇺 903 92 130ms 27 May 2024 594th sean-niemann 🇺🇸 903 92 123ms 8 Jun 2025 597th Lydxn 🇨🇦 902 69 7ms 12 Sep 2022 597th GrayJoKing 🇦🇺 902 69 7ms 12 Sep 2022 597th btnlq 902 69 7ms 24 Sep 2022 600th michael-pruglo 🇺🇦 902 94 61ms 5 Jul 2022 First Prev 526–600 of 3,423 Next Last