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 ><> 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 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 ><> 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 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 459th dirckvdende 896 69 17ms 11 Jul 2025 459th xnor-gate 896 69 17ms 19 Aug 2025 459th BrunoVisnadi 🇧🇷 896 69 25ms 1 Oct 2025 459th Mukundan314 896 69 19ms 13 Nov 2025 459th bizy-coder 896 69 18ms 21 Nov 2025 459th duckyluuk 🇳🇱 896 69 19ms 4 Dec 2025 459th bricknellj 896 69 17ms 4 Dec 2025 459th Seek64 🇩🇪 896 69 18ms 26 Dec 2025 489th MichalMarsalek 🇨🇿 896 87 436ms 5 May 2022 489th Kloppermand 🇩🇰 896 87 414ms 7 Oct 2022 489th bwat2 896 87 397ms 6 Apr 2023 492nd m-tkach 🇺🇦 896 117 25ms 7 May 2022 492nd Lydxn 🇨🇦 896 117 26ms 7 May 2022 494th Shanethegamer 🇺🇸 894 61 5ms 31 Oct 2022 494th MeWhenI 🇻🇦 894 61 5ms 4 Nov 2022 496th JayXon 🇺🇸 894 74 2,178ms 14 Nov 2024 497th oeb25 894 93 121ms 16 May 2022 497th snobee 🇨🇦 894 93 126ms 8 Dec 2022 497th logvp 894 93 121ms 2 Jan 2024 497th elgan65536 894 93 115ms 5 Mar 2024 497th smartiel 894 93 127ms 12 Aug 2024 497th trist224 🇫🇷 894 93 121ms 12 Aug 2024 497th nullie 894 93 125ms 19 Dec 2024 497th lolgeny 894 93 121ms 22 Feb 2025 505th GolfingSuccess 🇬🇷 894 95 57ms 5 May 2022 505th Alex-x90 🇺🇸 894 95 57ms 4 Dec 2022 505th Mandrzejy 🇵🇱 894 95 53ms 22 Mar 2024 508th Steffan153 🇫🇮 893 52 7ms 31 Dec 2022 508th blaztoma 🇱🇹 893 52 7ms 19 days ago 510th Yewzir 🇧🇪 893 72 110ms 20 Nov 2025 511th DialFrost 🇸🇬 892 56 1,180ms 1 Sep 2025 512th KatieLG 🇬🇧 892 60 10ms 4 May 2022 512th ScottHamper 892 60 10ms 5 May 2022 512th Re-Adventures 🇮🇳 892 60 10ms 5 May 2022 512th 0x24a537r9 892 60 11ms 29 Jul 2022 512th stefangabos 🇷🇴 892 60 11ms 19 Aug 2022 512th eranws 892 60 10ms 10 Sep 2022 512th GeorgeStechman 🇬🇧 892 60 11ms 26 Sep 2022 512th BloodStormKnight 892 60 12ms 15 Oct 2022 512th dzshn 892 60 11ms 3 Dec 2022 512th biocommando 🇫🇮 892 60 10ms 20 Dec 2022 512th Betuaredead 892 60 10ms 5 Jan 2023 512th piano-miles 892 60 11ms 16 Jan 2023 512th Yewzir 🇧🇪 892 60 11ms 12 Feb 2023 512th shellbertt 🇨🇦 892 60 11ms 26 Feb 2023 512th zakariamouhid 892 60 11ms 20 May 2023 512th raphaelimahorn 892 60 11ms 23 Aug 2023 512th jbt 892 60 11ms 25 Dec 2023 512th olleicua 🇺🇸 892 60 10ms 15 Feb 2024 512th HumanoidCPU 892 60 11ms 3 May 2024 512th dokutan 892 60 10ms 13 Aug 2024 512th LostSyntax21 🇬🇧 892 60 11ms 10 Sep 2024 512th xyangst 892 60 9ms 28 Sep 2024 512th a6166231 🇨🇳 892 60 11ms 15 May 2025 512th Protothor 892 60 10ms 8 Jul 2025 512th SebassNoob 892 60 11ms 5 Aug 2025 512th levinwinter 892 60 14ms 22 Oct 2025 512th Cube14yt 892 60 10ms 16 Nov 2025 512th gigaprofisi 🇺🇸 892 60 9ms 17 Nov 2025 512th amazingalek 🇳🇴 892 60 11ms 20 Dec 2025 512th shandriy 892 60 11ms 14 days ago 542nd lynn 892 65 283ms 5 May 2022 542nd GrayJoKing 🇦🇺 892 65 250ms 5 May 2022 542nd Sakisan 🇧🇪 892 65 178ms 6 May 2022 542nd JayXon 🇺🇸 892 65 311ms 17 Oct 2022 542nd Steffan153 🇫🇮 892 65 185ms 12 Nov 2022 542nd tobeannouncd 892 65 312ms 25 Apr 2025 542nd sean-niemann 🇺🇸 892 65 168ms 9 Jun 2025 549th stefangimmillaro 892 71 89ms 2 Oct 2022 549th Steffan153 🇫🇮 892 71 96ms 23 Feb 2023 549th Shanethegamer 🇺🇸 892 71 90ms 16 May 2023 549th sean-niemann 🇺🇸 892 71 89ms 12 Jul 2024 553rd Lydxn 🇨🇦 892 108 305ms 6 May 2022 553rd CaedenHarper 🇨🇦 892 108 291ms 5 Oct 2025 555th GrayJoKing 🇦🇺 891 77 76ms 13 Sep 2024 556th DialFrost 🇸🇬 891 95 29ms 10 Dec 2024 557th canissimia 🇦🇶 891 110 2,640ms 20 Feb 2023 558th jared-hughes 891 130 23ms 15 Dec 2024 559th canissimia 🇦🇶 891 204 16ms 25 Nov 2023 560th primo-ppcg 🇹🇭 890 52 219ms 5 May 2022 First Prev 481–560 of 3,565 Next Last