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 388th lifthrasiir 🇰🇷 907 59 11ms 23 Nov 2024 388th fuzzylojik-golf 🇺🇸 907 59 11ms 1 Jun 2025 388th acollett89 907 59 12ms 17 Jun 2025 388th iczelia 🇩🇪 907 59 12ms 23 Sep 2025 388th Yax42 🇫🇷 907 59 10ms 20 Jan 2026 388th Protothor 907 59 11ms 7 days ago 407th Steffan153 🇫🇮 907 80 28ms 15 Nov 2022 407th error256 907 80 117ms 8 Apr 2025 409th piano-miles 907 92 411ms 24 Feb 2026 410th nipzu 906 48 46ms 8 Sep 2024 411th shinh 906 52 43ms 29 Jun 2022 412th Lydxn 🇨🇦 906 64 181ms 1 Apr 2023 413th krcs 🇵🇱 906 86 381ms 10 May 2022 413th billings7 🇬🇧 906 86 384ms 15 May 2022 413th revlayle 🇺🇸 906 86 379ms 7 Dec 2022 413th Widgitty 906 86 368ms 1 Sep 2023 413th albanian-laundromat 906 86 430ms 30 Sep 2025 418th Lydxn 🇨🇦 905 70 96ms 7 May 2022 419th MeWhenI 🇻🇦 905 71 148ms 20 Aug 2024 420th Steffan153 🇫🇮 905 82 42ms 1 Apr 2023 420th sean-niemann 🇺🇸 905 82 42ms 12 Jul 2024 422nd m-tkach 🇺🇦 904 72 110ms 16 Oct 2022 422nd GrayJoKing 🇦🇺 904 72 113ms 22 Oct 2022 422nd emplv 🇱🇻 904 72 111ms 27 Oct 2022 422nd sean-niemann 🇺🇸 904 72 172ms 7 Mar 2025 426th DialFrost 🇸🇬 904 74 17ms 22 Feb 2026 426th Steffan153 🇫🇮 904 74 17ms 22 Feb 2026 426th GrayJoKing 🇦🇺 904 74 16ms 22 Feb 2026 426th GolfingSuccess 🇬🇷 904 74 16ms 24 Feb 2026 426th snoozingnewt 🇨🇦 904 74 16ms 4 Mar 2026 426th edsrzf 🇳🇿 904 74 16ms 24 days ago 432nd stefangimmillaro 904 92 130ms 24 Oct 2023 432nd inverseLorentz 🇦🇺 904 92 120ms 27 May 2024 432nd sean-niemann 🇺🇸 904 92 129ms 8 Jun 2025 432nd ian-h-chamberlain 🇺🇸 904 92 146ms 23 Nov 2025 432nd jusaka 904 92 128ms 4 hours ago 437th michael-pruglo 🇺🇦 904 94 61ms 5 Jul 2022 437th zygoloid 904 94 60ms 5 Aug 2024 437th AdrienHache 🇫🇷 904 94 60ms 27 Dec 2025 440th Lydxn 🇨🇦 902 69 6ms 12 Sep 2022 440th GrayJoKing 🇦🇺 902 69 7ms 12 Sep 2022 440th btnlq 902 69 7ms 24 Sep 2022 443rd Steffan153 🇫🇮 901 67 112ms 18 Dec 2022 443rd Lydxn 🇨🇦 901 67 122ms 4 Feb 2023 443rd sean-niemann 🇺🇸 901 67 110ms 7 Mar 2025 446th albanian-laundromat 901 107 274ms 22 Dec 2025 447th SirBogman 🇺🇸 900 50 516ms 5 May 2022 447th nwellnhof 🇩🇪 900 50 504ms 3 Jun 2022 447th Lydxn 🇨🇦 900 50 431ms 15 Aug 2022 447th Steffan153 🇫🇮 900 50 485ms 9 Aug 2024 451st Lydxn 🇨🇦 900 72 353ms 16 Jul 2023 452nd Lydxn 🇨🇦 899 48 257ms 5 May 2022 452nd p-zubieta 899 48 299ms 6 Mar 2024 454th GrayJoKing 🇦🇺 899 70 2ms 6 May 2022 454th saito-ta 🇯🇵 899 70 2ms 21 Dec 2023 454th ovs-code 🇩🇪 899 70 2ms 17 Feb 2024 454th trinityy-7 899 70 2ms 7 Aug 2025 454th KasperKivimaeki 🇫🇮 899 70 6ms 8 Aug 2025 459th GrayJoKing 🇦🇺 899 91 30ms 19 Jan 2023 460th NickTheEASDude 🇺🇸 898 76 6ms 7 May 2024 460th edsrzf 🇳🇿 898 76 6ms 23 Dec 2025 460th Shanethegamer 🇺🇸 898 76 5ms 23 Dec 2025 460th jared-hughes 898 76 5ms 24 Dec 2025 460th Waffle3z 898 76 5ms 26 Dec 2025 460th Blendi-Goose 898 76 5ms 6 Feb 2026 460th kTheLemon 898 76 5ms 27 days ago 467th edsrzf 🇳🇿 898 78 12ms 26 Oct 2024 468th DialFrost 🇸🇬 897 29 154ms 15 Mar 2025 469th Steffan153 🇫🇮 897 59 156ms 10 Aug 2024 469th rucin93 🇵🇱 897 59 144ms 13 Oct 2024 469th sean-niemann 🇺🇸 897 59 147ms 13 Oct 2024 469th lukegustafson 🇺🇸 897 59 140ms 24 Oct 2024 473rd Ripick 897 73 122ms 8 May 2023 474th error256 897 81 30ms 14 days ago 475th ovs-code 🇩🇪 897 89 458ms 24 Jul 2024 475th jipsong 🇩🇪 897 89 450ms 7 Apr 2025 475th DialFrost 🇸🇬 897 89 485ms 24 Dec 2025 475th dokutan 897 89 425ms 8 Feb 2026 479th m-tkach 🇺🇦 897 117 25ms 7 May 2022 479th Lydxn 🇨🇦 897 117 26ms 7 May 2022 First Prev 401–480 of 3,662 Next Last