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 NFA Simulator 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 NFA Simulator 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 503rd Protothor 892 60 10ms 8 Jul 2025 503rd SebassNoob 892 60 10ms 5 Aug 2025 503rd Yax42 🇫🇷 892 60 10ms 5 Sep 2025 503rd levinwinter 892 60 10ms 22 Oct 2025 503rd Cube14yt 892 60 10ms 18 days ago 503rd gigaprofisi 🇺🇸 892 60 10ms 16 days ago 532nd stefangimmillaro 892 71 89ms 2 Oct 2022 532nd Steffan153 🇫🇮 892 71 90ms 23 Feb 2023 532nd Shanethegamer 🇺🇸 892 71 89ms 16 May 2023 532nd sean-niemann 🇺🇸 892 71 87ms 12 Jul 2024 536th RockOfStone 892 73 5ms 20 Oct 2025 537th sean-niemann 🇺🇸 892 109 260ms 25 May 2024 537th GolfingSuccess 🇬🇷 892 109 267ms 6 Sep 2025 539th lynn 891 65 316ms 5 May 2022 539th GrayJoKing 🇦🇺 891 65 327ms 5 May 2022 539th Sakisan 🇧🇪 891 65 214ms 6 May 2022 539th JayXon 🇺🇸 891 65 366ms 17 Oct 2022 539th Steffan153 🇫🇮 891 65 172ms 12 Nov 2022 539th tobeannouncd 891 65 331ms 25 Apr 2025 539th sean-niemann 🇺🇸 891 65 174ms 9 Jun 2025 546th GrayJoKing 🇦🇺 891 77 76ms 13 Sep 2024 547th DialFrost 🇸🇬 891 95 32ms 10 Dec 2024 548th canissimia 🇦🇶 891 110 2,640ms 20 Feb 2023 549th jared-hughes 891 130 23ms 15 Dec 2024 550th primo-ppcg 🇹🇭 890 52 211ms 5 May 2022 550th dvargas46 🇺🇸 890 52 86ms 22 Dec 2022 552nd canissimia 🇦🇶 890 204 16ms 25 Nov 2023 553rd mousetail 🇳🇱 888 41 73ms 29 Aug 2025 554th MeWhenI 🇻🇦 888 53 41ms 1 Jun 2022 554th stefangimmillaro 888 53 38ms 2 Oct 2022 554th Haksell 🇦🇶 888 53 40ms 22 Feb 2023 557th primo-ppcg 🇹🇭 888 85 43ms 14 Jan 2025 557th MeWhenI 🇻🇦 888 85 44ms 21 Apr 2025 559th albanian-laundromat 887 94 339ms 24 Sep 2025 559th jkelly467 887 94 339ms 23 Oct 2025 559th HumanoidCPU 887 94 337ms 26 days ago 562nd Shanethegamer 🇺🇸 886 70 93ms 12 Dec 2022 562nd Alessandro-Balconi 🇮🇹 886 70 88ms 26 Dec 2022 564th GolfingSuccess 🇬🇷 886 71 2ms 5 May 2022 564th emplv 🇱🇻 886 71 3ms 5 May 2022 564th JayXon 🇺🇸 886 71 2ms 7 May 2022 564th nwellnhof 🇩🇪 886 71 2ms 5 Jun 2022 564th stefangimmillaro 886 71 2ms 2 Jun 2023 564th 09cf 886 71 2ms 4 Oct 2023 564th kkoenig 886 71 3ms 21 Dec 2023 564th sean-niemann 🇺🇸 886 71 3ms 10 Jul 2024 564th masinag 🇮🇹 886 71 2ms 6 Oct 2024 573rd ovs-code 🇩🇪 886 73 300ms 22 Jul 2023 574th janbehrens 🇩🇪 886 90 442ms 21 Apr 2023 574th Yewzir 🇧🇪 886 90 463ms 22 Apr 2023 574th DialFrost 🇸🇬 886 90 440ms 6 Nov 2023 574th Ripick 886 90 439ms 27 Nov 2024 578th m-tkach 🇺🇦 886 112 118ms 22 Jun 2025 579th SiestaGuru 885 88 314ms 9 Jan 2023 579th rifatx 885 88 327ms 5 Jul 2024 579th kmathis22 885 88 343ms 25 Sep 2025 579th arcpolaris 885 88 344ms 26 days ago 583rd snoozingnewt 🇨🇦 885 96 97ms 19 hours ago 584th m-tkach 🇺🇦 884 59 440ms 21 Jan 2024 584th GolfingSuccess 🇬🇷 884 59 506ms 20 Jan 2025 584th duckyluuk 🇳🇱 884 59 416ms a min ago 587th steffan-polygolf 884 74 126ms 14 Feb 2024 588th kg583 🇺🇸 884 84 18ms 30 Jul 2025 589th nipzu 884 94 126ms 17 May 2022 589th Natanaelel 🇸🇪 884 94 122ms 17 Jun 2022 589th nkoppel 884 94 123ms 19 Oct 2022 589th ovs-code 🇩🇪 884 94 125ms 21 Jun 2023 589th mousetail 🇳🇱 884 94 127ms 12 Jan 2024 594th MeWhenI 🇻🇦 884 110 260ms 9 Feb 2023 594th edsrzf 🇳🇿 884 110 255ms 28 Nov 2024 594th targrik 884 110 265ms 30 Jun 2025 597th MichalMarsalek 🇨🇿 883 70 22ms 5 May 2022 597th primo-ppcg 🇹🇭 883 70 23ms 5 May 2022 597th SirBogman 🇺🇸 883 70 19ms 5 May 2022 597th prplz 🇦🇺 883 70 19ms 5 May 2022 First Prev 526–600 of 3,508 Next Last