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 745th ListeriaM 873 72 2ms 22 Aug 2023 745th JohandeRuiter 🇳🇱 873 72 2ms 14 Sep 2024 745th larcherMTT 873 72 3ms 5 Oct 2024 745th snyderek 🇺🇸 873 72 3ms 19 Feb 2025 745th 5quiwyrm 873 72 3ms 29 Jun 2025 745th TeodorDyakov 🇧🇬 873 72 2ms 8 Jul 2025 745th xiaoyiming123 873 72 2ms 12 Jul 2025 758th ovs-code 🇩🇪 873 83 63ms 1 Jul 2024 759th DialFrost 🇸🇬 872 64 5ms 10 Jul 2024 760th dieggsy 872 97 41ms 8 Oct 2024 761st ulucs 871 35 9ms 8 May 2022 761st bstrat 871 35 8ms 6 Jun 2024 761st wh3n3v3r 🇨🇿 871 35 9ms 18 Nov 2024 764th scpchicken 🇵🇼 871 45 349ms 4 May 2022 764th SirBogman 🇺🇸 871 45 241ms 5 May 2022 766th Andriamanitra 🇫🇮 871 54 42ms 21 Jul 2022 766th jared-hughes 871 54 39ms 12 Sep 2022 766th OhmNomNom 871 54 47ms 7 Oct 2022 766th olleicua 🇺🇸 871 54 41ms 21 Jan 2024 766th LostSyntax21 🇬🇧 871 54 41ms 12 Mar 2025 766th AbrahamJLR 🇻🇪 871 54 40ms 4 Jun 2025 766th vishal-mohanty 871 54 42ms 25 Aug 2025 773rd TFeld00 🇩🇰 871 71 25ms 17 May 2022 773rd DialFrost 🇸🇬 871 71 36ms 15 Nov 2022 773rd StefanHabel 🇨🇦 871 71 18ms 29 Nov 2022 773rd nstearns96 🇬🇧 871 71 19ms 11 Jan 2023 773rd hallvabo 🇳🇴 871 71 19ms 7 Feb 2023 773rd anter69 🇭🇺 871 71 18ms 21 May 2024 773rd rucin93 🇵🇱 871 71 17ms 10 Jul 2024 773rd lelbal 871 71 18ms 26 Aug 2025 773rd HETHAT 🇩🇿 871 71 24ms 23 Sep 2025 773rd 09cf 871 71 17ms 13 days ago 773rd blaztoma 🇱🇹 871 71 23ms 6 days ago 784th MeWhenI 🇻🇦 871 85 44ms 27 Jun 2022 784th Shanethegamer 🇺🇸 871 85 42ms 15 May 2023 784th albanian-laundromat 871 85 45ms 25 Aug 2025 787th ovs-code 🇩🇪 871 133 42ms 8 Jul 2024 788th CaedenHarper 🇨🇦 869 60 710ms 28 Sep 2025 789th Steffan153 🇫🇮 869 82 1,270ms 23 Feb 2023 790th Frowny 868 38 43ms 5 May 2022 790th stackofbears 868 38 53ms 14 Mar 2025 792nd steffan-polygolf 868 73 79ms 23 Feb 2023 792nd MWI-polygolf 868 73 73ms 6 Dec 2023 792nd HumanoidCPU 868 73 72ms 7 May 2024 795th mtirado1 868 75 8ms 13 Aug 2022 796th 123mjb 868 96 346ms 11 days ago 796th noescareno 868 96 344ms 9 days ago 798th stefangimmillaro 868 112 259ms 26 Sep 2023 798th kkoenig 868 112 256ms 4 Jan 2024 800th pardouin 🇫🇷 867 61 135ms 7 Aug 2024 801st MeWhenI 🇻🇦 867 92 398ms 10 Oct 2022 801st Betuaredead 867 92 468ms 5 Jan 2023 801st emgordon154 867 92 427ms 27 May 2025 801st Yax42 🇫🇷 867 92 420ms 4 Oct 2025 805th TylerBloom 866 96 127ms 22 Mar 2024 806th 5quiwyrm 865 52 279ms 4 Sep 2022 806th MeWhenI 🇻🇦 865 52 261ms 28 Jan 2023 806th Feniske 🇫🇷 865 52 208ms 7 Nov 2023 806th dcgjb 865 52 251ms 29 Jan 2024 806th JPRuskin 🇬🇧 865 52 290ms 7 Apr 2025 806th IISResetMe 865 52 259ms 7 Apr 2025 806th Ripick 865 52 261ms 1 Jun 2025 813th Andriamanitra 🇫🇮 865 67 159ms 26 Apr 2023 814th MeWhenI 🇻🇦 865 81 8ms 23 May 2023 815th bac0id 865 90 320ms 26 Sep 2023 815th deadp4nda 🇩🇪 865 90 315ms 26 Apr 2024 815th 123mjb 865 90 321ms 23 Jun 2025 815th michelebastione 🇮🇹 865 90 365ms 24 Aug 2025 815th razvandmtr 🇷🇴 865 90 342ms 25 days ago 820th shellbertt 🇨🇦 865 98 54ms 9 May 2022 820th iakolzin 865 98 52ms 26 May 2022 820th Betuaredead 865 98 53ms 5 Jan 2023 820th oceko 865 98 52ms 19 Feb 2024 820th dokutan 865 98 55ms 17 Mar 2024 820th cuzdav 865 98 53ms 4 May 2025 First Prev 751–825 of 3,499 Next Last