Collatz in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous 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 Tower of Hanoi 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 Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang 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 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 Erlang 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 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 Tower of Hanoi 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 Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 506th LostSyntax21 🇬🇧 892 60 11ms 10 Sep 2024 506th xyangst 892 60 10ms 28 Sep 2024 506th a6166231 🇨🇳 892 60 9ms 15 May 2025 506th Protothor 892 60 10ms 8 Jul 2025 506th SebassNoob 892 60 10ms 5 Aug 2025 506th Yax42 🇫🇷 892 60 10ms 5 Sep 2025 506th levinwinter 892 60 10ms 22 Oct 2025 506th Cube14yt 892 60 10ms 16 Nov 2025 506th gigaprofisi 🇺🇸 892 60 10ms 17 Nov 2025 535th stefangimmillaro 892 71 91ms 2 Oct 2022 535th Steffan153 🇫🇮 892 71 96ms 23 Feb 2023 535th Shanethegamer 🇺🇸 892 71 90ms 16 May 2023 535th sean-niemann 🇺🇸 892 71 89ms 12 Jul 2024 539th RockOfStone 892 73 4ms 20 Oct 2025 540th Lydxn 🇨🇦 892 108 263ms 6 May 2022 540th CaedenHarper 🇨🇦 892 108 308ms 5 Oct 2025 542nd lynn 891 65 283ms 5 May 2022 542nd GrayJoKing 🇦🇺 891 65 250ms 5 May 2022 542nd Sakisan 🇧🇪 891 65 178ms 6 May 2022 542nd JayXon 🇺🇸 891 65 311ms 17 Oct 2022 542nd Steffan153 🇫🇮 891 65 185ms 12 Nov 2022 542nd tobeannouncd 891 65 312ms 25 Apr 2025 542nd sean-niemann 🇺🇸 891 65 168ms 9 Jun 2025 549th GrayJoKing 🇦🇺 891 77 96ms 13 Sep 2024 550th DialFrost 🇸🇬 891 95 29ms 10 Dec 2024 551st canissimia 🇦🇶 891 110 2,640ms 20 Feb 2023 552nd jared-hughes 891 130 23ms 15 Dec 2024 553rd primo-ppcg 🇹🇭 890 52 211ms 5 May 2022 553rd dvargas46 🇺🇸 890 52 85ms 22 Dec 2022 555th canissimia 🇦🇶 890 204 16ms 25 Nov 2023 556th mousetail 🇳🇱 888 41 66ms 29 Aug 2025 557th MeWhenI 🇻🇦 888 53 36ms 1 Jun 2022 557th stefangimmillaro 888 53 35ms 2 Oct 2022 557th Haksell 🇦🇶 888 53 36ms 22 Feb 2023 560th primo-ppcg 🇹🇭 888 85 39ms 14 Jan 2025 560th MeWhenI 🇻🇦 888 85 41ms 21 Apr 2025 562nd Shanethegamer 🇺🇸 887 70 99ms 12 Dec 2022 562nd Alessandro-Balconi 🇮🇹 887 70 95ms 26 Dec 2022 564th ovs-code 🇩🇪 887 73 340ms 22 Jul 2023 565th albanian-laundromat 887 94 415ms 24 Sep 2025 565th jkelly467 887 94 544ms 23 Oct 2025 565th HumanoidCPU 887 94 397ms 8 Nov 2025 568th snoozingnewt 🇨🇦 887 96 109ms 12 days ago 569th GolfingSuccess 🇬🇷 886 71 2ms 5 May 2022 569th emplv 🇱🇻 886 71 2ms 5 May 2022 569th JayXon 🇺🇸 886 71 2ms 7 May 2022 569th nwellnhof 🇩🇪 886 71 2ms 5 Jun 2022 569th stefangimmillaro 886 71 2ms 2 Jun 2023 569th 09cf 886 71 7ms 4 Oct 2023 569th kkoenig 886 71 2ms 21 Dec 2023 569th sean-niemann 🇺🇸 886 71 2ms 10 Jul 2024 569th masinag 🇮🇹 886 71 2ms 6 Oct 2024 578th janbehrens 🇩🇪 886 90 442ms 21 Apr 2023 578th Yewzir 🇧🇪 886 90 426ms 22 Apr 2023 578th DialFrost 🇸🇬 886 90 440ms 6 Nov 2023 578th Ripick 886 90 439ms 27 Nov 2024 578th emgordon154 886 90 368ms 6 days ago 583rd m-tkach 🇺🇦 886 112 118ms 22 Jun 2025 584th SiestaGuru 885 88 326ms 9 Jan 2023 584th rifatx 885 88 322ms 5 Jul 2024 584th kmathis22 885 88 367ms 25 Sep 2025 584th arcpolaris 885 88 391ms 8 Nov 2025 588th m-tkach 🇺🇦 884 59 404ms 21 Jan 2024 588th GolfingSuccess 🇬🇷 884 59 474ms 20 Jan 2025 588th duckyluuk 🇳🇱 884 59 450ms 12 days ago 591st steffan-polygolf 884 74 136ms 14 Feb 2024 592nd kg583 🇺🇸 884 84 18ms 30 Jul 2025 593rd nipzu 884 94 116ms 17 May 2022 593rd Natanaelel 🇸🇪 884 94 125ms 17 Jun 2022 593rd nkoppel 884 94 120ms 19 Oct 2022 593rd ovs-code 🇩🇪 884 94 120ms 21 Jun 2023 593rd mousetail 🇳🇱 884 94 124ms 12 Jan 2024 598th sean-niemann 🇺🇸 884 109 274ms 25 May 2024 598th GolfingSuccess 🇬🇷 884 109 273ms 6 Sep 2025 600th MichalMarsalek 🇨🇿 883 70 19ms 5 May 2022 First Prev 526–600 of 3,524 Next Last