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 319th Steffan153 🇫🇮 917 87 460ms 16 May 2023 319th Lydxn 🇨🇦 917 87 456ms 16 May 2023 319th GrayJoKing 🇦🇺 917 87 461ms 11 Aug 2023 319th sean-niemann 🇺🇸 917 87 468ms 11 Jul 2024 325th Shanethegamer 🇺🇸 916 61 3ms 9 Oct 2023 325th edsrzf 🇳🇿 916 61 3ms 4 Jul 2025 327th Mukundan314 916 67 609ms 25 Dec 2025 328th kmathis22 916 91 370ms 20 Nov 2025 329th Natanaelel 🇸🇪 915 57 459ms 17 Jan 2024 329th Kacarott 🇦🇺 915 57 402ms 10 Sep 2024 331st ovs-code 🇩🇪 915 75 67ms 12 Sep 2024 331st Kacarott 🇦🇺 915 75 62ms 13 Sep 2024 333rd Lydxn 🇨🇦 915 81 39ms 1 Apr 2023 334th andersk 🇺🇸 914 91 127ms 25 Oct 2022 334th Super-Pizza 🇨🇦 914 91 124ms 4 Dec 2022 334th klixel 🇨🇦 914 91 134ms 20 May 2023 334th lynn 914 91 126ms 6 Jul 2024 334th edsrzf 🇳🇿 914 91 126ms 29 Nov 2024 334th DialFrost 🇸🇬 914 91 125ms 7 Apr 2025 334th elgan65536 🇺🇸 914 91 128ms 12 days ago 341st lynn 913 78 1,382ms 5 May 2022 342nd tailorspy 913 93 54ms 27 May 2024 342nd sean-niemann 🇺🇸 913 93 53ms 9 Jun 2025 342nd KasperKivimaeki 🇫🇮 913 93 56ms 26 Oct 2025 345th nai62 912 69 7ms 27 Aug 2022 346th GrayJoKing 🇦🇺 912 71 321ms 10 Aug 2023 347th edsrzf 🇳🇿 910 54 884ms 13 Sep 2025 347th CaedenHarper 🇨🇦 910 54 1,451ms 27 Sep 2025 347th sean-niemann 🇺🇸 910 54 1,442ms 27 Sep 2025 347th albanian-laundromat 910 54 959ms 14 Nov 2025 347th xsot 🇸🇬 910 54 1,025ms 15 Nov 2025 352nd GolfingSuccess 🇬🇷 910 64 91ms 14 Dec 2024 352nd MeWhenI 🇻🇦 910 64 91ms 24 Dec 2024 352nd GrayJoKing 🇦🇺 910 64 90ms 25 Nov 2025 355th edsrzf 🇳🇿 910 72 135ms 3 Jul 2025 356th Shanethegamer 🇺🇸 910 77 14ms 15 May 2023 357th primo-ppcg 🇹🇭 910 93 30ms 7 May 2022 357th AlephSquirrel 910 93 26ms 21 Jan 2023 357th kg583 🇺🇸 910 93 29ms 26 Dec 2024 357th CLOStrophobic 🇮🇹 910 93 30ms 17 Jan 2025 357th edsrzf 🇳🇿 910 93 30ms 3 Jul 2025 362nd Betuaredead 909 60 5ms 5 Jan 2023 362nd Yewzir 🇧🇪 909 60 5ms 12 Feb 2023 362nd Steffan153 🇫🇮 909 60 5ms 23 Feb 2023 362nd GolfingSuccess 🇬🇷 909 60 5ms 16 Oct 2024 362nd sean-niemann 🇺🇸 909 60 9ms 7 Mar 2025 367th MeWhenI 🇻🇦 909 63 184ms 5 May 2022 368th Lydxn 🇨🇦 909 68 463ms 5 May 2022 368th GrayJoKing 🇦🇺 909 68 15ms 15 Nov 2022 368th Bubbler-4 909 68 15ms 15 Nov 2022 368th Rubiksmath 909 68 15ms 14 Aug 2023 372nd sean-niemann 🇺🇸 909 75 5ms 23 Dec 2025 372nd Steffan153 🇫🇮 909 75 5ms 11 days ago 374th marshallward 🇺🇸 909 83 40ms 10 May 2022 375th ovs-code 🇩🇪 909 84 65ms 25 Sep 2022 375th GrayJoKing 🇦🇺 909 84 65ms 11 Aug 2023 375th edsrzf 🇳🇿 909 84 81ms 12 Nov 2025 378th m-tkach 🇺🇦 909 90 31ms 7 Dec 2023 379th edsrzf 🇳🇿 908 83 41ms 14 Jan 2025 379th kg583 🇺🇸 908 83 42ms 14 Feb 2025 381st KrausRaus 🇺🇸 907 59 16ms 4 May 2022 381st voytxt 🇨🇿 907 59 14ms 4 May 2022 381st KingSkyrock 🇺🇸 907 59 12ms 18 May 2022 381st ZakkkkAttackkkk 🇵🇭 907 59 11ms 14 Jul 2022 381st aksyristos 907 59 10ms 28 Oct 2022 381st nstearns96 🇬🇧 907 59 11ms 28 Nov 2022 381st janbehrens 🇩🇪 907 59 11ms 17 May 2023 381st Shanethegamer 🇺🇸 907 59 11ms 25 May 2023 381st Maznek 907 59 12ms 26 Jun 2023 381st SpiritAxolotl 🇺🇸 907 59 12ms 20 Mar 2024 381st Andrey-Plotnikov 907 59 14ms 19 May 2024 381st emgordon154 907 59 11ms 5 Aug 2024 381st duckyluuk 🇳🇱 907 59 12ms 3 Oct 2024 381st lifthrasiir 🇰🇷 907 59 12ms 23 Nov 2024 381st fuzzylojik-golf 🇺🇸 907 59 13ms 1 Jun 2025 381st acollett89 907 59 11ms 17 Jun 2025 381st iczelia 🇩🇪 907 59 13ms 23 Sep 2025 381st Yax42 🇫🇷 907 59 11ms 20 Jan 2026 399th nipzu 906 48 46ms 8 Sep 2024 400th Lydxn 🇨🇦 906 64 181ms 1 Apr 2023 First Prev 321–400 of 3,595 Next Last