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 Multitap Input 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 Multitap Input 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 747th Steffan153 🇫🇮 873 72 2ms 3 Jan 2023 747th MeWhenI 🇻🇦 873 72 3ms 7 May 2023 747th ListeriaM 873 72 2ms 22 Aug 2023 747th JohandeRuiter 🇳🇱 873 72 3ms 14 Sep 2024 747th larcherMTT 873 72 2ms 5 Oct 2024 747th snyderek 🇺🇸 873 72 3ms 19 Feb 2025 747th 5quiwyrm 873 72 2ms 29 Jun 2025 747th TeodorDyakov 🇧🇬 873 72 3ms 8 Jul 2025 747th xiaoyiming123 873 72 2ms 12 Jul 2025 760th ovs-code 🇩🇪 873 83 54ms 1 Jul 2024 761st Andriamanitra 🇫🇮 872 54 37ms 21 Jul 2022 761st jared-hughes 872 54 37ms 12 Sep 2022 761st OhmNomNom 872 54 37ms 7 Oct 2022 761st olleicua 🇺🇸 872 54 39ms 21 Jan 2024 761st LostSyntax21 🇬🇧 872 54 38ms 12 Mar 2025 761st AbrahamJLR 🇻🇪 872 54 36ms 4 Jun 2025 761st vishal-mohanty 872 54 36ms 25 Aug 2025 768th DialFrost 🇸🇬 872 64 5ms 10 Jul 2024 769th dieggsy 872 97 28ms 8 Oct 2024 770th ulucs 871 35 9ms 8 May 2022 770th bstrat 871 35 9ms 6 Jun 2024 770th wh3n3v3r 🇨🇿 871 35 8ms 18 Nov 2024 773rd scpchicken 🇵🇼 871 45 406ms 4 May 2022 773rd SirBogman 🇺🇸 871 45 300ms 5 May 2022 775th TFeld00 🇩🇰 871 71 24ms 17 May 2022 775th DialFrost 🇸🇬 871 71 24ms 15 Nov 2022 775th StefanHabel 🇨🇦 871 71 18ms 29 Nov 2022 775th nstearns96 🇬🇧 871 71 18ms 11 Jan 2023 775th hallvabo 🇳🇴 871 71 19ms 7 Feb 2023 775th anter69 🇭🇺 871 71 17ms 21 May 2024 775th rucin93 🇵🇱 871 71 17ms 10 Jul 2024 775th lelbal 871 71 19ms 26 Aug 2025 775th HETHAT 🇩🇿 871 71 23ms 23 Sep 2025 775th 09cf 871 71 17ms 20 days ago 775th blaztoma 🇱🇹 871 71 24ms 13 days ago 775th Languag3 871 71 23ms 3 days ago 787th MeWhenI 🇻🇦 871 85 41ms 27 Jun 2022 787th Shanethegamer 🇺🇸 871 85 38ms 15 May 2023 787th albanian-laundromat 871 85 40ms 25 Aug 2025 790th ovs-code 🇩🇪 871 133 42ms 8 Jul 2024 791st CaedenHarper 🇨🇦 869 60 431ms 28 Sep 2025 792nd Steffan153 🇫🇮 869 82 1,270ms 23 Feb 2023 793rd Frowny 868 38 43ms 5 May 2022 793rd stackofbears 868 38 53ms 14 Mar 2025 795th steffan-polygolf 868 73 79ms 23 Feb 2023 795th MWI-polygolf 868 73 80ms 6 Dec 2023 795th HumanoidCPU 868 73 77ms 7 May 2024 798th mtirado1 868 75 7ms 13 Aug 2022 799th 123mjb 868 96 356ms 18 days ago 799th noescareno 868 96 406ms 16 days ago 801st stefangimmillaro 868 112 268ms 26 Sep 2023 801st kkoenig 868 112 287ms 4 Jan 2024 803rd pardouin 🇫🇷 867 61 129ms 7 Aug 2024 804th MeWhenI 🇻🇦 867 92 398ms 10 Oct 2022 804th Betuaredead 867 92 468ms 5 Jan 2023 804th emgordon154 867 92 427ms 27 May 2025 804th Yax42 🇫🇷 867 92 420ms 4 Oct 2025 808th Shanethegamer 🇺🇸 867 98 106ms 15 Apr 2025 808th GolfingSuccess 🇬🇷 867 98 98ms 10 days ago 808th DialFrost 🇸🇬 867 98 94ms 7 days ago 811th TylerBloom 866 96 180ms 22 Mar 2024 812th 5quiwyrm 865 52 279ms 4 Sep 2022 812th MeWhenI 🇻🇦 865 52 261ms 28 Jan 2023 812th Feniske 🇫🇷 865 52 208ms 7 Nov 2023 812th dcgjb 865 52 251ms 29 Jan 2024 812th JPRuskin 🇬🇧 865 52 290ms 7 Apr 2025 812th IISResetMe 865 52 259ms 7 Apr 2025 812th Ripick 865 52 261ms 1 Jun 2025 819th Andriamanitra 🇫🇮 865 67 144ms 26 Apr 2023 820th MeWhenI 🇻🇦 865 81 8ms 23 May 2023 821st bac0id 865 90 320ms 26 Sep 2023 821st deadp4nda 🇩🇪 865 90 315ms 26 Apr 2024 821st 123mjb 865 90 321ms 23 Jun 2025 821st michelebastione 🇮🇹 865 90 365ms 24 Aug 2025 821st razvandmtr 🇷🇴 865 90 342ms 6 Nov 2025 First Prev 751–825 of 3,511 Next Last