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 392nd SpiritAxolotl 🇺🇸 907 59 13ms 20 Mar 2024 392nd Andrey-Plotnikov 907 59 11ms 19 May 2024 392nd emgordon154 907 59 10ms 5 Aug 2024 392nd duckyluuk 🇳🇱 907 59 13ms 3 Oct 2024 392nd lifthrasiir 🇰🇷 907 59 11ms 23 Nov 2024 392nd fuzzylojik-golf 🇺🇸 907 59 13ms 1 Jun 2025 392nd acollett89 907 59 13ms 17 Jun 2025 392nd iczelia 🇩🇪 907 59 11ms 23 Sep 2025 392nd Yax42 🇫🇷 907 59 10ms 20 Jan 2026 392nd Protothor 907 59 12ms 12 days ago 411th Steffan153 🇫🇮 907 80 28ms 15 Nov 2022 411th error256 907 80 117ms 8 Apr 2025 413th piano-miles 907 92 411ms 24 Feb 2026 414th nipzu 906 48 56ms 8 Sep 2024 415th shinh 906 52 43ms 29 Jun 2022 416th Lydxn 🇨🇦 906 64 181ms 1 Apr 2023 417th krcs 🇵🇱 906 86 381ms 10 May 2022 417th billings7 🇬🇧 906 86 384ms 15 May 2022 417th revlayle 🇺🇸 906 86 379ms 7 Dec 2022 417th Widgitty 906 86 368ms 1 Sep 2023 417th albanian-laundromat 🇺🇸 906 86 430ms 30 Sep 2025 422nd Lydxn 🇨🇦 905 70 96ms 7 May 2022 423rd MeWhenI 🇻🇦 905 71 148ms 20 Aug 2024 424th Steffan153 🇫🇮 905 82 42ms 1 Apr 2023 424th sean-niemann 🇺🇸 905 82 42ms 12 Jul 2024 426th m-tkach 🇺🇦 904 72 117ms 16 Oct 2022 426th GrayJoKing 🇦🇺 904 72 128ms 22 Oct 2022 426th emplv 🇱🇻 904 72 110ms 27 Oct 2022 426th sean-niemann 🇺🇸 904 72 141ms 7 Mar 2025 430th DialFrost 🇸🇬 904 74 17ms 22 Feb 2026 430th Steffan153 🇫🇮 904 74 17ms 22 Feb 2026 430th GrayJoKing 🇦🇺 904 74 16ms 22 Feb 2026 430th GolfingSuccess 🇬🇷 904 74 16ms 24 Feb 2026 430th snoozingnewt 🇨🇦 904 74 16ms 4 Mar 2026 430th edsrzf 🇳🇿 904 74 16ms 9 Mar 2026 436th stefangimmillaro 904 92 130ms 24 Oct 2023 436th inverseLorentz 🇦🇺 904 92 120ms 27 May 2024 436th sean-niemann 🇺🇸 904 92 129ms 8 Jun 2025 436th ian-h-chamberlain 🇺🇸 904 92 140ms 23 Nov 2025 440th michael-pruglo 🇺🇦 904 94 61ms 5 Jul 2022 440th zygoloid 904 94 60ms 5 Aug 2024 440th AdrienHache 🇫🇷 904 94 60ms 27 Dec 2025 443rd Lydxn 🇨🇦 902 69 6ms 12 Sep 2022 443rd GrayJoKing 🇦🇺 902 69 7ms 12 Sep 2022 443rd btnlq 902 69 7ms 24 Sep 2022 446th Steffan153 🇫🇮 901 67 112ms 18 Dec 2022 446th Lydxn 🇨🇦 901 67 122ms 4 Feb 2023 446th sean-niemann 🇺🇸 901 67 110ms 7 Mar 2025 449th albanian-laundromat 🇺🇸 901 107 274ms 22 Dec 2025 450th SirBogman 🇺🇸 900 50 506ms 5 May 2022 450th nwellnhof 🇩🇪 900 50 484ms 3 Jun 2022 450th Lydxn 🇨🇦 900 50 431ms 15 Aug 2022 450th Steffan153 🇫🇮 900 50 485ms 9 Aug 2024 454th Lydxn 🇨🇦 900 72 353ms 16 Jul 2023 455th Lydxn 🇨🇦 899 48 257ms 5 May 2022 455th p-zubieta 899 48 283ms 6 Mar 2024 457th GrayJoKing 🇦🇺 899 70 2ms 6 May 2022 457th saito-ta 🇯🇵 899 70 2ms 21 Dec 2023 457th ovs-code 🇩🇪 899 70 2ms 17 Feb 2024 457th trinityy-7 899 70 2ms 7 Aug 2025 457th KasperKivimaeki 🇫🇮 899 70 6ms 8 Aug 2025 462nd GrayJoKing 🇦🇺 899 91 30ms 19 Jan 2023 463rd NickTheEASDude 🇺🇸 898 76 6ms 7 May 2024 463rd edsrzf 🇳🇿 898 76 6ms 23 Dec 2025 463rd Shanethegamer 🇺🇸 898 76 5ms 23 Dec 2025 463rd jared-hughes 898 76 5ms 24 Dec 2025 463rd Waffle3z 898 76 5ms 26 Dec 2025 463rd Blendi-Goose 898 76 5ms 6 Feb 2026 463rd kTheLemon 898 76 5ms 7 Mar 2026 470th edsrzf 🇳🇿 898 78 12ms 26 Oct 2024 471st DialFrost 🇸🇬 897 29 154ms 15 Mar 2025 472nd Steffan153 🇫🇮 897 59 145ms 10 Aug 2024 472nd rucin93 🇵🇱 897 59 144ms 13 Oct 2024 472nd sean-niemann 🇺🇸 897 59 147ms 13 Oct 2024 472nd lukegustafson 🇺🇸 897 59 140ms 24 Oct 2024 476th Ripick 897 73 122ms 8 May 2023 477th error256 897 81 18ms 19 days ago 478th ovs-code 🇩🇪 897 89 458ms 24 Jul 2024 478th jipsong 🇩🇪 897 89 450ms 7 Apr 2025 478th DialFrost 🇸🇬 897 89 485ms 24 Dec 2025 First Prev 401–480 of 3,670 Next Last