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 Dragon Curve 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 Dragon Curve 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 398th ZakkkkAttackkkk 🇵🇭 907 59 11ms 14 Jul 2022 398th aksyristos 907 59 12ms 28 Oct 2022 398th nstearns96 🇬🇧 907 59 12ms 28 Nov 2022 398th janbehrens 🇩🇪 907 59 12ms 17 May 2023 398th Shanethegamer 🇺🇸 907 59 15ms 25 May 2023 398th Maznek 907 59 11ms 26 Jun 2023 398th SpiritAxolotl 🇺🇸 907 59 11ms 20 Mar 2024 398th Andrey-Plotnikov 907 59 11ms 19 May 2024 398th emgordon154 907 59 13ms 5 Aug 2024 398th duckyluuk 🇳🇱 907 59 12ms 3 Oct 2024 398th lifthrasiir 🇰🇷 907 59 11ms 23 Nov 2024 398th fuzzylojik-golf 🇺🇸 907 59 13ms 1 Jun 2025 398th acollett89 907 59 15ms 17 Jun 2025 398th iczelia 🇩🇪 907 59 12ms 23 Sep 2025 398th Yax42 🇫🇷 907 59 11ms 20 Jan 2026 398th Protothor 907 59 11ms 27 Mar 2026 417th MeWhenI 🇻🇦 907 71 139ms 20 Aug 2024 418th krcs 🇵🇱 907 86 407ms 10 May 2022 418th billings7 🇬🇧 907 86 444ms 15 May 2022 418th revlayle 🇺🇸 907 86 444ms 7 Dec 2022 418th Widgitty 907 86 419ms 1 Sep 2023 418th albanian-laundromat 🇺🇸 907 86 462ms 30 Sep 2025 423rd piano-miles 907 92 464ms 24 Feb 2026 424th shinh 906 52 38ms 29 Jun 2022 425th Lydxn 🇨🇦 906 64 181ms 1 Apr 2023 426th DialFrost 🇸🇬 906 74 16ms 22 Feb 2026 426th Steffan153 🇫🇮 906 74 16ms 22 Feb 2026 426th GrayJoKing 🇦🇺 906 74 16ms 22 Feb 2026 426th GolfingSuccess 🇬🇷 906 74 16ms 24 Feb 2026 426th snoozingnewt 🇨🇦 906 74 16ms 4 Mar 2026 426th edsrzf 🇳🇿 906 74 16ms 9 Mar 2026 432nd Steffan153 🇫🇮 906 82 42ms 1 Apr 2023 432nd sean-niemann 🇺🇸 906 82 42ms 12 Jul 2024 434th Lydxn 🇨🇦 905 70 101ms 7 May 2022 435th m-tkach 🇺🇦 905 72 111ms 16 Oct 2022 435th GrayJoKing 🇦🇺 905 72 112ms 22 Oct 2022 435th emplv 🇱🇻 905 72 111ms 27 Oct 2022 435th sean-niemann 🇺🇸 905 72 126ms 7 Mar 2025 439th stefangimmillaro 904 92 132ms 24 Oct 2023 439th inverseLorentz 🇦🇺 904 92 129ms 27 May 2024 439th sean-niemann 🇺🇸 904 92 135ms 8 Jun 2025 439th ian-h-chamberlain 🇺🇸 904 92 136ms 23 Nov 2025 443rd michael-pruglo 🇺🇦 904 94 62ms 5 Jul 2022 443rd zygoloid 904 94 62ms 5 Aug 2024 443rd AdrienHache 🇫🇷 904 94 60ms 27 Dec 2025 446th Lydxn 🇨🇦 902 69 6ms 12 Sep 2022 446th GrayJoKing 🇦🇺 902 69 7ms 12 Sep 2022 446th btnlq 902 69 7ms 24 Sep 2022 449th Lydxn 🇨🇦 902 72 353ms 16 Jul 2023 450th Steffan153 🇫🇮 901 67 110ms 18 Dec 2022 450th Lydxn 🇨🇦 901 67 118ms 4 Feb 2023 450th sean-niemann 🇺🇸 901 67 110ms 7 Mar 2025 453rd albanian-laundromat 🇺🇸 901 107 329ms 22 Dec 2025 454th SirBogman 🇺🇸 900 50 408ms 5 May 2022 454th nwellnhof 🇩🇪 900 50 398ms 3 Jun 2022 454th Lydxn 🇨🇦 900 50 515ms 15 Aug 2022 454th Steffan153 🇫🇮 900 50 455ms 9 Aug 2024 458th GrayJoKing 🇦🇺 900 91 30ms 19 Jan 2023 459th Lydxn 🇨🇦 899 48 273ms 5 May 2022 459th p-zubieta 899 48 295ms 6 Mar 2024 461st GrayJoKing 🇦🇺 899 70 2ms 6 May 2022 461st saito-ta 🇯🇵 899 70 2ms 21 Dec 2023 461st ovs-code 🇩🇪 899 70 2ms 17 Feb 2024 461st trinityy-7 899 70 2ms 7 Aug 2025 461st KasperKivimaeki 🇫🇮 899 70 6ms 8 Aug 2025 466th NickTheEASDude 🇺🇸 899 76 6ms 7 May 2024 466th edsrzf 🇳🇿 899 76 6ms 23 Dec 2025 466th Shanethegamer 🇺🇸 899 76 5ms 23 Dec 2025 466th jared-hughes 899 76 5ms 24 Dec 2025 466th Waffle3z 899 76 5ms 26 Dec 2025 466th Blendi-Goose 899 76 5ms 6 Feb 2026 466th kTheLemon 899 76 5ms 7 Mar 2026 473rd edsrzf 🇳🇿 899 78 12ms 26 Oct 2024 474th m-tkach 🇺🇦 899 117 25ms 7 May 2022 474th Lydxn 🇨🇦 899 117 26ms 7 May 2022 476th Steffan153 🇫🇮 898 59 138ms 10 Aug 2024 476th rucin93 🇵🇱 898 59 145ms 13 Oct 2024 476th sean-niemann 🇺🇸 898 59 144ms 13 Oct 2024 476th lukegustafson 🇺🇸 898 59 158ms 24 Oct 2024 480th Ripick 898 73 181ms 8 May 2023 First Prev 401–480 of 3,778 Next Last