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 464th sean-niemann 🇺🇸 896 69 19ms 7 Mar 2025 464th plcc0 896 69 16ms 26 Mar 2025 464th yujh-yujh 🇬🇸 896 69 17ms 28 Mar 2025 464th moustave 896 69 16ms 10 Jun 2025 464th 4atj 896 69 3,504ms 30 Jun 2025 464th dirckvdende 896 69 17ms 11 Jul 2025 464th xnor-gate 896 69 17ms 19 Aug 2025 464th BrunoVisnadi 🇧🇷 896 69 24ms 1 Oct 2025 464th Mukundan314 896 69 18ms 13 Nov 2025 464th bizy-coder 896 69 18ms 21 Nov 2025 464th duckyluuk 🇳🇱 896 69 18ms 4 Dec 2025 464th bricknellj 896 69 17ms 4 Dec 2025 464th Seek64 🇩🇪 896 69 17ms 26 Dec 2025 494th MichalMarsalek 🇨🇿 896 87 436ms 5 May 2022 494th Kloppermand 🇩🇰 896 87 414ms 7 Oct 2022 494th bwat2 896 87 397ms 6 Apr 2023 494th bpharaldsson 896 87 353ms 13 days ago 498th m-tkach 🇺🇦 896 117 25ms 7 May 2022 498th Lydxn 🇨🇦 896 117 26ms 7 May 2022 500th DialFrost 🇸🇬 895 74 16ms 14 hours ago 500th Steffan153 🇫🇮 895 74 17ms 13 hours ago 500th GrayJoKing 🇦🇺 895 74 16ms 13 hours ago 503rd Shanethegamer 🇺🇸 894 61 5ms 31 Oct 2022 503rd MeWhenI 🇻🇦 894 61 5ms 4 Nov 2022 505th JayXon 🇺🇸 894 74 2,178ms 14 Nov 2024 506th oeb25 894 93 119ms 16 May 2022 506th snobee 🇨🇦 894 93 116ms 8 Dec 2022 506th logvp 894 93 121ms 2 Jan 2024 506th smartiel 894 93 119ms 12 Aug 2024 506th trist224 🇫🇷 894 93 121ms 12 Aug 2024 506th nullie 894 93 120ms 19 Dec 2024 506th lolgeny 894 93 124ms 22 Feb 2025 513th GolfingSuccess 🇬🇷 894 95 57ms 5 May 2022 513th Alex-x90 🇺🇸 894 95 57ms 4 Dec 2022 513th Mandrzejy 🇵🇱 894 95 53ms 22 Mar 2024 516th Steffan153 🇫🇮 893 52 7ms 31 Dec 2022 516th blaztoma 🇱🇹 893 52 7ms 18 Jan 2026 518th Yewzir 🇧🇪 893 72 110ms 20 Nov 2025 519th KatieLG 🇬🇧 892 60 15ms 4 May 2022 519th ScottHamper 892 60 11ms 5 May 2022 519th Re-Adventures 🇮🇳 892 60 10ms 5 May 2022 519th 0x24a537r9 892 60 14ms 29 Jul 2022 519th stefangabos 🇷🇴 892 60 14ms 19 Aug 2022 519th eranws 892 60 11ms 10 Sep 2022 519th GeorgeStechman 🇬🇧 892 60 12ms 26 Sep 2022 519th BloodStormKnight 892 60 11ms 15 Oct 2022 519th dzshn 892 60 13ms 3 Dec 2022 519th biocommando 🇫🇮 892 60 13ms 20 Dec 2022 519th Betuaredead 892 60 10ms 5 Jan 2023 519th piano-miles 892 60 12ms 16 Jan 2023 519th Yewzir 🇧🇪 892 60 11ms 12 Feb 2023 519th shellbertt 🇨🇦 892 60 9ms 26 Feb 2023 519th zakariamouhid 892 60 11ms 20 May 2023 519th raphaelimahorn 892 60 11ms 23 Aug 2023 519th jbt 892 60 13ms 25 Dec 2023 519th olleicua 🇺🇸 892 60 12ms 15 Feb 2024 519th HumanoidCPU 892 60 11ms 3 May 2024 519th dokutan 892 60 15ms 13 Aug 2024 519th LostSyntax21 🇬🇧 892 60 13ms 10 Sep 2024 519th xyangst 892 60 14ms 28 Sep 2024 519th a6166231 🇨🇳 892 60 11ms 15 May 2025 519th Protothor 892 60 14ms 8 Jul 2025 519th SebassNoob 892 60 16ms 5 Aug 2025 519th levinwinter 892 60 13ms 22 Oct 2025 519th Cube14yt 892 60 12ms 16 Nov 2025 519th gigaprofisi 🇺🇸 892 60 11ms 17 Nov 2025 519th amazingalek 🇳🇴 892 60 10ms 20 Dec 2025 519th shandriy 892 60 12ms 23 Jan 2026 519th spidunno 892 60 11ms 4 days ago 550th lynn 892 65 283ms 5 May 2022 550th GrayJoKing 🇦🇺 892 65 250ms 5 May 2022 550th Sakisan 🇧🇪 892 65 178ms 6 May 2022 550th JayXon 🇺🇸 892 65 301ms 17 Oct 2022 550th Steffan153 🇫🇮 892 65 181ms 12 Nov 2022 550th tobeannouncd 892 65 302ms 25 Apr 2025 550th sean-niemann 🇺🇸 892 65 168ms 9 Jun 2025 557th stefangimmillaro 892 71 89ms 2 Oct 2022 557th Steffan153 🇫🇮 892 71 96ms 23 Feb 2023 557th Shanethegamer 🇺🇸 892 71 90ms 16 May 2023 557th sean-niemann 🇺🇸 892 71 89ms 12 Jul 2024 First Prev 481–560 of 3,595 Next Last