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 Calendar 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 Multitap Input 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 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 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 ><> ALGOL 68 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 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 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 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Calendar 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 Multitap Input 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 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 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 718th Natanaelel 🇸🇪 878 66 144ms 15 Jun 2022 718th Z-snails 878 66 254ms 27 Feb 2023 718th Jeremy-Stafford 878 66 258ms 27 Feb 2023 718th alomiF 878 66 293ms 1 Sep 2023 718th btnlq 878 66 145ms 17 Oct 2023 718th Shengxuan-Zhang 878 66 278ms 4 days ago 727th DialFrost 🇸🇬 878 86 40ms 24 Oct 2024 727th stefangimmillaro 878 86 39ms 14 Jan 2025 729th emgordon154 878 97 104ms 3 Dec 2025 730th c0d3-4-F00d 🇩🇪 877 61 12ms 6 May 2022 730th jackkav 877 61 12ms 26 Jun 2022 730th TechNolaByte 877 61 11ms 6 Jul 2022 730th Heathcorp 🇦🇺 877 61 11ms 17 Jul 2022 730th C0de5mith 🇺🇸 877 61 12ms 3 Aug 2022 730th sebipopa 🇷🇴 877 61 10ms 18 Aug 2022 730th moikaturns 🇬🇧 877 61 12ms 25 Sep 2022 730th FlorianCassayre 🇫🇷 877 61 11ms 27 Sep 2022 730th Mazn3k 877 61 11ms 1 Feb 2023 730th tvcv901 877 61 11ms 22 Mar 2023 730th unfinishedprogram 877 61 11ms 19 Jul 2023 730th snoozingnewt 🇨🇦 877 61 10ms 23 Sep 2023 730th funnyboy-roks 877 61 12ms 9 May 2024 730th bac0id 877 61 10ms 29 Jun 2024 730th madex 🇩🇪 877 61 12ms 9 Jul 2024 730th FortuiteMan 🇫🇷 877 61 11ms 10 Oct 2024 730th RobertHoeh 877 61 12ms 5 Apr 2025 730th LvLError 877 61 11ms 29 May 2025 730th miles-evan 877 61 13ms 5 Aug 2025 730th alexsave 877 61 10ms 13 Oct 2025 750th nwellnhof 🇩🇪 876 53 6ms 4 May 2022 750th GrayJoKing 🇦🇺 876 53 7ms 6 May 2022 752nd c0d3-4-F00d 🇩🇪 876 89 368ms 5 May 2022 752nd fkantelberg 876 89 388ms 15 Jul 2023 752nd TRexOnGit 876 89 423ms 16 Feb 2024 755th MeWhenI 🇻🇦 876 110 281ms 9 Feb 2023 755th edsrzf 🇳🇿 876 110 292ms 28 Nov 2024 755th targrik 876 110 271ms 30 Jun 2025 758th AlephSquirrel 875 80 12ms 20 Apr 2023 758th ashtraypettingzoo 🇺🇸 875 80 14ms 1 Apr 2024 760th inventshah 875 97 57ms 6 May 2022 760th roupiq 🇵🇱 875 97 55ms 22 Nov 2023 760th emgordon154 875 97 63ms 16 days ago 763rd DialFrost 🇸🇬 874 69 88ms 15 Jul 2024 764th Irratix 🇳🇱 874 72 2ms 4 May 2022 764th m-tkach 🇺🇦 874 72 2ms 4 May 2022 764th jared-hughes 874 72 2ms 6 Jul 2022 764th michael-pruglo 🇺🇦 874 72 2ms 13 Jul 2022 764th Steffan153 🇫🇮 874 72 2ms 3 Jan 2023 764th MeWhenI 🇻🇦 874 72 2ms 7 May 2023 764th ListeriaM 874 72 2ms 22 Aug 2023 764th JohandeRuiter 🇳🇱 874 72 3ms 14 Sep 2024 764th larcherMTT 874 72 2ms 5 Oct 2024 764th snyderek 🇺🇸 874 72 2ms 19 Feb 2025 764th 5quiwyrm 874 72 2ms 29 Jun 2025 764th TeodorDyakov 🇧🇬 874 72 3ms 8 Jul 2025 764th xiaoyiming123 874 72 2ms 12 Jul 2025 777th Steffan153 🇫🇮 874 83 481ms 9 Apr 2023 778th ovs-code 🇩🇪 874 85 16ms 11 Dec 2023 779th DialFrost 🇸🇬 873 64 5ms 10 Jul 2024 780th ovs-code 🇩🇪 873 83 57ms 1 Jul 2024 781st Andriamanitra 🇫🇮 872 54 41ms 21 Jul 2022 781st jared-hughes 872 54 37ms 12 Sep 2022 781st OhmNomNom 872 54 37ms 7 Oct 2022 781st olleicua 🇺🇸 872 54 41ms 21 Jan 2024 781st LostSyntax21 🇬🇧 872 54 41ms 12 Mar 2025 781st AbrahamJLR 🇻🇪 872 54 40ms 4 Jun 2025 781st vishal-mohanty 872 54 40ms 25 Aug 2025 788th Shanethegamer 🇺🇸 872 85 38ms 15 May 2023 788th albanian-laundromat 872 85 40ms 25 Aug 2025 790th dieggsy 872 97 28ms 8 Oct 2024 791st ulucs 871 35 9ms 8 May 2022 791st bstrat 871 35 8ms 6 Jun 2024 791st wh3n3v3r 🇨🇿 871 35 8ms 18 Nov 2024 794th scpchicken 🇵🇼 871 45 332ms 4 May 2022 794th SirBogman 🇺🇸 871 45 230ms 5 May 2022 796th TFeld00 🇩🇰 871 71 25ms 17 May 2022 796th DialFrost 🇸🇬 871 71 25ms 15 Nov 2022 796th StefanHabel 🇨🇦 871 71 19ms 29 Nov 2022 796th nstearns96 🇬🇧 871 71 21ms 11 Jan 2023 796th hallvabo 🇳🇴 871 71 19ms 7 Feb 2023 First Prev 721–800 of 3,596 Next Last