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 669th BlankSpruce 883 96 54ms 20 Aug 2024 669th fuzzylojik-golf 🇺🇸 883 96 55ms 14 Jun 2025 678th Shanethegamer 🇺🇸 882 51 420ms 15 May 2023 679th GrayJoKing 🇦🇺 882 60 142ms 24 Oct 2024 680th Shanethegamer 🇺🇸 881 73 90ms 8 May 2025 680th DialFrost 🇸🇬 881 73 83ms 3 Jun 2025 680th edsrzf 🇳🇿 881 73 101ms 4 Jul 2025 683rd GrayJoKing 🇦🇺 881 84 53ms 19 Jun 2022 683rd primo-ppcg 🇹🇭 881 84 48ms 29 Jun 2022 685th Shanethegamer 🇺🇸 881 142 438ms 27 Mar 2025 685th DialFrost 🇸🇬 881 142 456ms 28 Mar 2025 685th emgordon154 881 142 450ms 10 Apr 2025 688th primo-ppcg 🇹🇭 881 193 103ms 14 Aug 2025 689th johnnythedoggie 880 72 87ms 13 May 2022 689th kaascevich 880 72 81ms 8 Jul 2025 691st Grrisly 880 74 4ms 25 Mar 2024 692nd dokutan 879 62 5ms 28 Apr 2025 693rd Shanethegamer 🇺🇸 878 66 189ms 4 May 2022 693rd scpchicken 🇵🇼 878 66 328ms 5 May 2022 693rd sisyphus-ppcg 🇦🇺 878 66 170ms 6 May 2022 693rd Natanaelel 🇸🇪 878 66 159ms 15 Jun 2022 693rd Z-snails 878 66 339ms 27 Feb 2023 693rd Jeremy-Stafford 878 66 333ms 27 Feb 2023 693rd alomiF 878 66 367ms 1 Sep 2023 693rd btnlq 878 66 144ms 17 Oct 2023 701st DialFrost 🇸🇬 878 86 49ms 24 Oct 2024 701st stefangimmillaro 878 86 49ms 14 Jan 2025 703rd Shanethegamer 🇺🇸 878 98 106ms 15 Apr 2025 703rd GolfingSuccess 🇬🇷 878 98 99ms 4 days ago 703rd snoozingnewt 🇺🇸 878 98 95ms 27 hours ago 703rd DialFrost 🇸🇬 878 98 94ms 21 hours ago 707th JayXon 🇺🇸 878 158 1,590ms 14 Sep 2025 708th c0d3-4-F00d 🇩🇪 877 61 11ms 6 May 2022 708th jackkav 877 61 11ms 26 Jun 2022 708th TechNolaByte 877 61 10ms 6 Jul 2022 708th Heathcorp 🇦🇺 877 61 9ms 17 Jul 2022 708th C0de5mith 🇺🇸 877 61 10ms 3 Aug 2022 708th sebipopa 🇷🇴 877 61 10ms 18 Aug 2022 708th moikaturns 🇬🇧 877 61 11ms 25 Sep 2022 708th FlorianCassayre 🇫🇷 877 61 10ms 27 Sep 2022 708th Mazn3k 877 61 9ms 1 Feb 2023 708th tvcv901 877 61 10ms 22 Mar 2023 708th unfinishedprogram 877 61 9ms 19 Jul 2023 708th snoozingnewt 🇺🇸 877 61 9ms 23 Sep 2023 708th funnyboy-roks 877 61 10ms 9 May 2024 708th bac0id 877 61 10ms 29 Jun 2024 708th madex 🇩🇪 877 61 11ms 9 Jul 2024 708th FortuiteMan 🇫🇷 877 61 9ms 10 Oct 2024 708th RobertHoeh 877 61 12ms 5 Apr 2025 708th LvLError 877 61 12ms 29 May 2025 708th Lv0Sys 🇵🇱 877 61 9ms 30 May 2025 708th miles-evan 877 61 10ms 5 Aug 2025 708th alexsave 877 61 10ms 13 Oct 2025 729th GolfingSuccess 🇬🇷 876 57 787ms 29 Aug 2025 730th nwellnhof 🇩🇪 876 111 260ms 4 May 2022 730th emplv 🇱🇻 876 111 261ms 5 May 2022 730th Shanethegamer 🇺🇸 876 111 263ms 21 Nov 2023 733rd nwellnhof 🇩🇪 875 53 7ms 4 May 2022 733rd GrayJoKing 🇦🇺 875 53 7ms 6 May 2022 735th AlephSquirrel 875 80 11ms 20 Apr 2023 735th ashtraypettingzoo 🇺🇸 875 80 14ms 1 Apr 2024 737th c0d3-4-F00d 🇩🇪 875 89 311ms 5 May 2022 737th fkantelberg 875 89 319ms 15 Jul 2023 737th TRexOnGit 875 89 320ms 16 Feb 2024 740th Steffan153 🇫🇮 874 83 489ms 9 Apr 2023 741st ovs-code 🇩🇪 874 85 15ms 11 Dec 2023 742nd inventshah 874 97 54ms 6 May 2022 742nd roupiq 🇵🇱 874 97 56ms 22 Nov 2023 744th MeWhenI 🇻🇦 873 71 96ms 13 Dec 2022 745th Irratix 🇳🇱 873 72 3ms 4 May 2022 745th m-tkach 🇺🇦 873 72 2ms 4 May 2022 745th jared-hughes 873 72 3ms 6 Jul 2022 745th michael-pruglo 🇺🇦 873 72 3ms 13 Jul 2022 745th Steffan153 🇫🇮 873 72 3ms 3 Jan 2023 745th MeWhenI 🇻🇦 873 72 2ms 7 May 2023 First Prev 676–750 of 3,500 Next Last