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 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 ><> 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 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 64th tayloia 🇬🇧 955 56 10ms 10 Jul 2023 64th Argeento 🇵🇱 955 56 10ms 25 Aug 2023 64th weliveinhell 🇭🇹 955 56 10ms 2 Oct 2023 64th coreynash 955 56 10ms 6 Oct 2023 64th dylanarmstrong 955 56 10ms 10 Dec 2023 64th two-bad 🇬🇧 955 56 11ms 23 Feb 2024 64th mehbark 955 56 11ms 27 Jul 2024 64th madeforlosers 955 56 11ms 4 Nov 2024 64th XenThe 🇬🇧 955 56 10ms 6 Jun 2025 64th Tristanchaang 955 56 10ms 13 Nov 2025 86th Lydxn 🇨🇦 953 89 55ms 6 May 2022 86th JayXon 🇺🇸 953 89 53ms 7 May 2022 86th nwellnhof 🇩🇪 953 89 57ms 5 Jun 2022 86th snyderek 🇺🇸 953 89 60ms 19 Feb 2025 90th 2bular 952 32 27ms 17 Oct 2024 91st ovs-code 🇩🇪 950 61 248ms 5 Aug 2024 92nd Lydxn 🇨🇦 950 82 385ms 6 May 2022 92nd JayXon 🇺🇸 950 82 360ms 9 May 2022 94th Lydxn 🇨🇦 949 59 10ms 6 May 2022 95th Lydxn 🇨🇦 948 55 767ms 16 Jan 2024 95th ovs-code 🇩🇪 948 55 791ms 16 Jan 2024 95th Steffan153 🇫🇮 948 55 429ms 16 Jan 2024 95th kg583 🇺🇸 948 55 423ms 16 Feb 2024 95th Shanethegamer 🇺🇸 948 55 361ms 24 Mar 2024 95th pardouin 🇫🇷 948 55 394ms 30 Jun 2024 95th JayXon 🇺🇸 948 55 370ms 17 Aug 2024 95th sean-niemann 🇺🇸 948 55 451ms 24 Jan 2025 103rd primo-ppcg 🇹🇭 947 49 6ms 5 May 2022 103rd Lydxn 🇨🇦 947 49 6ms 8 May 2022 105th JayXon 🇺🇸 947 88 540ms 24 Sep 2025 105th Lydxn 🇨🇦 947 88 340ms 64 mins ago 107th lyphyser 946 46 54ms 13 Jan 2024 107th AdrienHache 🇫🇷 946 46 48ms 9 Apr 2024 109th saito-ta 🇯🇵 945 49 64ms 13 May 2022 109th Lydxn 🇨🇦 945 49 64ms 28 May 2022 111th JayXon 🇺🇸 945 88 127ms 17 Oct 2022 111th acotis 945 88 119ms 9 Jun 2025 111th kumavale 945 88 136ms 7 Oct 2025 114th JayXon 🇺🇸 943 69 3ms 17 Oct 2022 114th Lydxn 🇨🇦 943 69 3ms 4 Feb 2023 116th canissimia 🇦🇶 941 50 37ms 5 May 2022 116th ovs-code 🇩🇪 941 50 269ms 7 May 2022 116th sisyphus-ppcg 🇦🇺 941 50 38ms 20 Feb 2023 116th Steffan153 🇫🇮 941 50 39ms 20 Jul 2024 116th sean-niemann 🇺🇸 941 50 37ms 9 Jun 2025 116th pardouin 🇫🇷 941 50 38ms 22 Aug 2025 122nd canissimia 🇦🇶 940 51 927ms 6 May 2022 122nd Lydxn 🇨🇦 940 51 1,001ms 6 May 2022 122nd primo-ppcg 🇹🇭 940 51 930ms 6 May 2022 122nd pardouin 🇫🇷 940 51 953ms 12 Apr 2025 126th primo-ppcg 🇹🇭 940 58 5ms 13 Nov 2022 126th clockworknazo 940 58 6ms 15 Nov 2022 126th Lydxn 🇨🇦 940 58 6ms 7 Feb 2023 126th xsot 🇸🇬 940 58 6ms 28 Jun 2024 126th Salutations45 940 58 6ms 18 Dec 2024 126th canissimia 🇦🇶 940 58 6ms 4 hours ago 132nd inventshah 939 57 10ms 4 May 2022 132nd itsh01 939 57 10ms 17 May 2022 132nd Natanaelel 🇸🇪 939 57 10ms 16 Jun 2022 132nd Attero 🇸🇪 939 57 10ms 3 Aug 2022 132nd SirFireball3521 939 57 10ms 26 Jan 2023 132nd Kacarott 🇦🇺 939 57 10ms 24 Mar 2023 132nd nathanadams 🇳🇿 939 57 12ms 24 Apr 2023 132nd hacker112 🇸🇪 939 57 10ms 20 Jun 2024 132nd thisishowmymindworks 🇳🇴 939 57 11ms 28 Jun 2024 132nd Salutations45 939 57 10ms 18 Nov 2024 132nd daniel-cardone 939 57 10ms 3 Jul 2025 132nd CaedenHarper 🇨🇦 939 57 11ms 28 Sep 2025 132nd BrunoVisnadi 🇧🇷 939 57 10ms 21 Oct 2025 132nd Laellekoenig 939 57 10ms 22 Oct 2025 132nd JOrE20 🇺🇸 939 57 10ms 5 Nov 2025 132nd Lv0Sys 🇵🇱 939 57 14ms 5 days ago 148th Irratix 🇳🇱 938 83 351ms 4 May 2022 148th nwellnhof 🇩🇪 938 83 347ms 4 May 2022 148th ScottHamper 938 83 338ms 5 May 2022 First Prev 76–150 of 3,517 Next Last