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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 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 ArkScript 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 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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 478th dokutan 897 89 425ms 8 Feb 2026 482nd m-tkach 🇺🇦 897 117 25ms 7 May 2022 482nd Lydxn 🇨🇦 897 117 26ms 7 May 2022 484th nwellnhof 🇩🇪 896 69 24ms 4 May 2022 484th m-tkach 🇺🇦 896 69 18ms 4 May 2022 484th GolfingSuccess 🇬🇷 896 69 17ms 5 May 2022 484th jared-hughes 896 69 17ms 5 May 2022 484th ovs-code 🇩🇪 896 69 23ms 5 May 2022 484th btnlq 896 69 17ms 5 May 2022 484th sisyphus-ppcg 🇦🇺 896 69 15ms 6 May 2022 484th lynn 896 69 18ms 22 Aug 2022 484th Steffan153 🇫🇮 896 69 18ms 15 Nov 2022 484th AlexanderFair 896 69 24ms 19 Jul 2023 484th pardouin 🇫🇷 896 69 18ms 11 Nov 2023 484th AlephSquirrel 896 69 466ms 30 Dec 2023 484th kg583 🇺🇸 896 69 25ms 28 Jan 2024 484th davecame 896 69 23ms 20 Aug 2024 484th zacjl 896 69 17ms 19 Sep 2024 484th starfihs 896 69 18ms 12 Oct 2024 484th kops-cg 896 69 22ms 9 Feb 2025 484th sean-niemann 🇺🇸 896 69 19ms 7 Mar 2025 484th plcc0 896 69 16ms 26 Mar 2025 484th yujh-yujh 🇬🇸 896 69 17ms 28 Mar 2025 484th moustave 896 69 16ms 10 Jun 2025 484th 4atj 896 69 3,504ms 30 Jun 2025 484th dirckvdende 896 69 17ms 11 Jul 2025 484th xnor-gate 896 69 17ms 19 Aug 2025 484th BrunoVisnadi 🇧🇷 896 69 24ms 1 Oct 2025 484th Mukundan314 896 69 18ms 13 Nov 2025 484th bizy-coder 896 69 16ms 21 Nov 2025 484th duckyluuk 🇳🇱 896 69 18ms 4 Dec 2025 484th bricknellj 896 69 17ms 4 Dec 2025 484th Seek64 🇩🇪 896 69 17ms 26 Dec 2025 514th JayXon 🇺🇸 896 74 2,528ms 14 Nov 2024 515th MichalMarsalek 🇨🇿 896 87 379ms 5 May 2022 515th Kloppermand 🇩🇰 896 87 350ms 7 Oct 2022 515th bwat2 896 87 367ms 6 Apr 2023 515th bpharaldsson 896 87 418ms 9 Feb 2026 519th oeb25 895 93 127ms 16 May 2022 519th snobee 🇨🇦 895 93 128ms 8 Dec 2022 519th logvp 895 93 130ms 2 Jan 2024 519th smartiel 895 93 127ms 12 Aug 2024 519th trist224 🇫🇷 895 93 127ms 12 Aug 2024 519th nullie 895 93 128ms 19 Dec 2024 519th lolgeny 895 93 138ms 22 Feb 2025 526th Shanethegamer 🇺🇸 894 61 4ms 31 Oct 2022 526th MeWhenI 🇻🇦 894 61 4ms 4 Nov 2022 528th GolfingSuccess 🇬🇷 894 95 60ms 5 May 2022 528th Alex-x90 🇺🇸 894 95 64ms 4 Dec 2022 528th Mandrzejy 🇵🇱 894 95 60ms 22 Mar 2024 531st Steffan153 🇫🇮 893 52 7ms 31 Dec 2022 531st blaztoma 🇱🇹 893 52 10ms 18 Jan 2026 533rd Yewzir 🇧🇪 893 72 148ms 20 Nov 2025 534th KatieLG 🇬🇧 892 60 14ms 4 May 2022 534th ScottHamper 892 60 10ms 5 May 2022 534th Re-Adventures 🇮🇳 892 60 10ms 5 May 2022 534th 0x24a537r9 892 60 10ms 29 Jul 2022 534th stefangabos 🇷🇴 892 60 11ms 19 Aug 2022 534th eranws 892 60 11ms 10 Sep 2022 534th GeorgeStechman 🇬🇧 892 60 11ms 26 Sep 2022 534th BloodStormKnight 892 60 11ms 15 Oct 2022 534th dzshn 892 60 11ms 3 Dec 2022 534th biocommando 🇫🇮 892 60 14ms 20 Dec 2022 534th Betuaredead 892 60 11ms 5 Jan 2023 534th piano-miles 892 60 10ms 16 Jan 2023 534th Yewzir 🇧🇪 892 60 11ms 12 Feb 2023 534th shellbertt 🇨🇦 892 60 11ms 26 Feb 2023 534th zakariamouhid 892 60 11ms 20 May 2023 534th raphaelimahorn 892 60 10ms 23 Aug 2023 534th jbt 892 60 10ms 25 Dec 2023 534th olleicua 🇺🇸 892 60 11ms 15 Feb 2024 534th HumanoidCPU 892 60 10ms 3 May 2024 534th dokutan 892 60 11ms 13 Aug 2024 534th LostSyntax21 🇬🇧 892 60 15ms 10 Sep 2024 534th xyangst 892 60 12ms 28 Sep 2024 534th a6166231 🇨🇳 892 60 10ms 15 May 2025 534th SebassNoob 892 60 11ms 5 Aug 2025 534th levinwinter 892 60 10ms 22 Oct 2025 534th Cube14yt 892 60 11ms 16 Nov 2025 534th gigaprofisi 🇺🇸 892 60 18ms 17 Nov 2025 First Prev 481–560 of 3,670 Next Last