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 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 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 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 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 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 385th iczelia 🇩🇪 907 59 13ms 23 Sep 2025 385th Yax42 🇫🇷 907 59 12ms 20 Jan 2026 403rd nipzu 906 48 46ms 8 Sep 2024 404th shinh 906 52 37ms 29 Jun 2022 405th Lydxn 🇨🇦 906 64 181ms 1 Apr 2023 406th Steffan153 🇫🇮 906 80 31ms 15 Nov 2022 406th error256 906 80 121ms 8 Apr 2025 408th krcs 🇵🇱 906 86 381ms 10 May 2022 408th billings7 🇬🇧 906 86 391ms 15 May 2022 408th revlayle 🇺🇸 906 86 398ms 7 Dec 2022 408th Widgitty 906 86 396ms 1 Sep 2023 408th albanian-laundromat 906 86 539ms 30 Sep 2025 413th piano-miles 906 92 411ms 18 days ago 414th Lydxn 🇨🇦 905 70 88ms 7 May 2022 415th MeWhenI 🇻🇦 905 71 148ms 20 Aug 2024 416th m-tkach 🇺🇦 904 72 110ms 16 Oct 2022 416th GrayJoKing 🇦🇺 904 72 113ms 22 Oct 2022 416th emplv 🇱🇻 904 72 122ms 27 Oct 2022 416th sean-niemann 🇺🇸 904 72 181ms 7 Mar 2025 420th Steffan153 🇫🇮 904 82 42ms 1 Apr 2023 420th sean-niemann 🇺🇸 904 82 42ms 12 Jul 2024 422nd stefangimmillaro 904 92 128ms 24 Oct 2023 422nd inverseLorentz 🇦🇺 904 92 136ms 27 May 2024 422nd sean-niemann 🇺🇸 904 92 126ms 8 Jun 2025 422nd ian-h-chamberlain 🇺🇸 904 92 127ms 23 Nov 2025 426th michael-pruglo 🇺🇦 904 94 59ms 5 Jul 2022 426th zygoloid 904 94 60ms 5 Aug 2024 426th AdrienHache 🇫🇷 904 94 60ms 27 Dec 2025 429th Lydxn 🇨🇦 902 69 6ms 12 Sep 2022 429th GrayJoKing 🇦🇺 902 69 7ms 12 Sep 2022 429th btnlq 902 69 7ms 24 Sep 2022 432nd DialFrost 🇸🇬 902 74 17ms 21 days ago 432nd Steffan153 🇫🇮 902 74 18ms 21 days ago 432nd GrayJoKing 🇦🇺 902 74 19ms 21 days ago 432nd GolfingSuccess 🇬🇷 902 74 17ms 19 days ago 432nd snoozingnewt 🇨🇦 902 74 17ms 11 days ago 432nd edsrzf 🇳🇿 902 74 16ms 5 days ago 438th albanian-laundromat 901 107 295ms 22 Dec 2025 439th SirBogman 🇺🇸 900 50 497ms 5 May 2022 439th nwellnhof 🇩🇪 900 50 427ms 3 Jun 2022 439th Lydxn 🇨🇦 900 50 440ms 15 Aug 2022 439th Steffan153 🇫🇮 900 50 489ms 9 Aug 2024 443rd Steffan153 🇫🇮 900 67 112ms 18 Dec 2022 443rd Lydxn 🇨🇦 900 67 161ms 4 Feb 2023 443rd sean-niemann 🇺🇸 900 67 114ms 7 Mar 2025 446th Lydxn 🇨🇦 900 72 353ms 16 Jul 2023 447th GrayJoKing 🇦🇺 899 70 2ms 6 May 2022 447th saito-ta 🇯🇵 899 70 2ms 21 Dec 2023 447th ovs-code 🇩🇪 899 70 2ms 17 Feb 2024 447th trinityy-7 899 70 2ms 7 Aug 2025 447th KasperKivimaeki 🇫🇮 899 70 6ms 8 Aug 2025 452nd GrayJoKing 🇦🇺 899 91 30ms 19 Jan 2023 453rd Lydxn 🇨🇦 898 48 257ms 5 May 2022 453rd p-zubieta 898 48 299ms 6 Mar 2024 455th NickTheEASDude 🇺🇸 898 76 6ms 7 May 2024 455th edsrzf 🇳🇿 898 76 6ms 23 Dec 2025 455th Shanethegamer 🇺🇸 898 76 5ms 23 Dec 2025 455th jared-hughes 898 76 5ms 24 Dec 2025 455th Waffle3z 898 76 5ms 26 Dec 2025 455th Blendi-Goose 898 76 5ms 6 Feb 2026 455th kTheLemon 898 76 5ms 7 days ago 462nd edsrzf 🇳🇿 898 78 12ms 26 Oct 2024 463rd DialFrost 🇸🇬 897 29 160ms 15 Mar 2025 464th Steffan153 🇫🇮 897 59 156ms 10 Aug 2024 464th rucin93 🇵🇱 897 59 190ms 13 Oct 2024 464th sean-niemann 🇺🇸 897 59 191ms 13 Oct 2024 464th lukegustafson 🇺🇸 897 59 140ms 24 Oct 2024 468th Ripick 897 73 122ms 8 May 2023 469th ovs-code 🇩🇪 897 89 458ms 24 Jul 2024 469th jipsong 🇩🇪 897 89 450ms 7 Apr 2025 469th DialFrost 🇸🇬 897 89 485ms 24 Dec 2025 469th dokutan 897 89 425ms 8 Feb 2026 473rd nwellnhof 🇩🇪 896 69 24ms 4 May 2022 473rd m-tkach 🇺🇦 896 69 18ms 4 May 2022 473rd GolfingSuccess 🇬🇷 896 69 17ms 5 May 2022 473rd jared-hughes 896 69 17ms 5 May 2022 473rd ovs-code 🇩🇪 896 69 23ms 5 May 2022 473rd btnlq 896 69 17ms 5 May 2022 473rd sisyphus-ppcg 🇦🇺 896 69 15ms 6 May 2022 473rd lynn 896 69 18ms 22 Aug 2022 First Prev 401–480 of 3,624 Next Last