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 671st MateuszPietrzak 🇵🇱 883 96 60ms 18 Nov 2023 671st kkoenig 883 96 57ms 21 Dec 2023 671st BlankSpruce 883 96 53ms 20 Aug 2024 671st fuzzylojik-golf 🇺🇸 883 96 57ms 14 Jun 2025 680th Shanethegamer 🇺🇸 882 51 420ms 15 May 2023 681st GrayJoKing 🇦🇺 882 60 142ms 24 Oct 2024 682nd Shanethegamer 🇺🇸 881 73 90ms 8 May 2025 682nd DialFrost 🇸🇬 881 73 83ms 3 Jun 2025 682nd edsrzf 🇳🇿 881 73 101ms 4 Jul 2025 685th GrayJoKing 🇦🇺 881 84 53ms 19 Jun 2022 685th primo-ppcg 🇹🇭 881 84 48ms 29 Jun 2022 687th Shanethegamer 🇺🇸 881 142 438ms 27 Mar 2025 687th DialFrost 🇸🇬 881 142 456ms 28 Mar 2025 687th emgordon154 881 142 420ms 10 Apr 2025 690th primo-ppcg 🇹🇭 881 193 103ms 14 Aug 2025 691st johnnythedoggie 880 72 87ms 13 May 2022 691st kaascevich 880 72 81ms 8 Jul 2025 693rd Grrisly 880 74 4ms 25 Mar 2024 694th dokutan 879 62 5ms 28 Apr 2025 695th Shanethegamer 🇺🇸 878 66 189ms 4 May 2022 695th scpchicken 🇵🇼 878 66 328ms 5 May 2022 695th sisyphus-ppcg 🇦🇺 878 66 170ms 6 May 2022 695th Natanaelel 🇸🇪 878 66 159ms 15 Jun 2022 695th Z-snails 878 66 339ms 27 Feb 2023 695th Jeremy-Stafford 878 66 333ms 27 Feb 2023 695th alomiF 878 66 367ms 1 Sep 2023 695th btnlq 878 66 144ms 17 Oct 2023 703rd DialFrost 🇸🇬 878 86 49ms 24 Oct 2024 703rd stefangimmillaro 878 86 49ms 14 Jan 2025 705th JayXon 🇺🇸 878 158 1,590ms 14 Sep 2025 706th c0d3-4-F00d 🇩🇪 877 61 11ms 6 May 2022 706th jackkav 877 61 11ms 26 Jun 2022 706th TechNolaByte 877 61 10ms 6 Jul 2022 706th Heathcorp 🇦🇺 877 61 9ms 17 Jul 2022 706th C0de5mith 🇺🇸 877 61 10ms 3 Aug 2022 706th sebipopa 🇷🇴 877 61 10ms 18 Aug 2022 706th moikaturns 🇬🇧 877 61 11ms 25 Sep 2022 706th FlorianCassayre 🇫🇷 877 61 10ms 27 Sep 2022 706th Mazn3k 877 61 9ms 1 Feb 2023 706th tvcv901 877 61 10ms 22 Mar 2023 706th unfinishedprogram 877 61 9ms 19 Jul 2023 706th snoozingnewt 🇨🇦 877 61 9ms 23 Sep 2023 706th funnyboy-roks 877 61 10ms 9 May 2024 706th bac0id 877 61 10ms 29 Jun 2024 706th madex 🇩🇪 877 61 11ms 9 Jul 2024 706th FortuiteMan 🇫🇷 877 61 9ms 10 Oct 2024 706th RobertHoeh 877 61 12ms 5 Apr 2025 706th LvLError 877 61 12ms 29 May 2025 706th Lv0Sys 🇵🇱 877 61 9ms 30 May 2025 706th miles-evan 877 61 10ms 5 Aug 2025 706th alexsave 877 61 10ms 13 Oct 2025 727th GolfingSuccess 🇬🇷 876 57 787ms 29 Aug 2025 728th nwellnhof 🇩🇪 876 111 258ms 4 May 2022 728th emplv 🇱🇻 876 111 256ms 5 May 2022 728th Shanethegamer 🇺🇸 876 111 258ms 21 Nov 2023 731st nwellnhof 🇩🇪 875 53 7ms 4 May 2022 731st GrayJoKing 🇦🇺 875 53 7ms 6 May 2022 733rd AlephSquirrel 875 80 11ms 20 Apr 2023 733rd ashtraypettingzoo 🇺🇸 875 80 14ms 1 Apr 2024 735th c0d3-4-F00d 🇩🇪 875 89 311ms 5 May 2022 735th fkantelberg 875 89 319ms 15 Jul 2023 735th TRexOnGit 875 89 320ms 16 Feb 2024 738th emgordon154 875 97 100ms 7 hours ago 739th Steffan153 🇫🇮 874 83 446ms 9 Apr 2023 740th ovs-code 🇩🇪 874 85 15ms 11 Dec 2023 741st inventshah 874 97 58ms 6 May 2022 741st roupiq 🇵🇱 874 97 56ms 22 Nov 2023 743rd MeWhenI 🇻🇦 873 71 96ms 13 Dec 2022 744th Irratix 🇳🇱 873 72 3ms 4 May 2022 744th m-tkach 🇺🇦 873 72 2ms 4 May 2022 744th jared-hughes 873 72 3ms 6 Jul 2022 744th michael-pruglo 🇺🇦 873 72 3ms 13 Jul 2022 744th Steffan153 🇫🇮 873 72 3ms 3 Jan 2023 744th MeWhenI 🇻🇦 873 72 2ms 7 May 2023 744th ListeriaM 873 72 2ms 22 Aug 2023 First Prev 676–750 of 3,508 Next Last