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 390th emgordon154 907 59 11ms 5 Aug 2024 390th duckyluuk 🇳🇱 907 59 12ms 3 Oct 2024 390th lifthrasiir 🇰🇷 907 59 11ms 23 Nov 2024 390th fuzzylojik-golf 🇺🇸 907 59 11ms 1 Jun 2025 390th acollett89 907 59 12ms 17 Jun 2025 390th iczelia 🇩🇪 907 59 12ms 23 Sep 2025 390th Yax42 🇫🇷 907 59 10ms 20 Jan 2026 390th Protothor 907 59 11ms 8 days ago 409th Steffan153 🇫🇮 907 80 28ms 15 Nov 2022 409th error256 907 80 117ms 8 Apr 2025 411th piano-miles 907 92 411ms 24 Feb 2026 412th nipzu 906 48 46ms 8 Sep 2024 413th shinh 906 52 43ms 29 Jun 2022 414th Lydxn 🇨🇦 906 64 181ms 1 Apr 2023 415th krcs 🇵🇱 906 86 381ms 10 May 2022 415th billings7 🇬🇧 906 86 384ms 15 May 2022 415th revlayle 🇺🇸 906 86 379ms 7 Dec 2022 415th Widgitty 906 86 368ms 1 Sep 2023 415th albanian-laundromat 906 86 430ms 30 Sep 2025 420th Lydxn 🇨🇦 905 70 96ms 7 May 2022 421st MeWhenI 🇻🇦 905 71 148ms 20 Aug 2024 422nd Steffan153 🇫🇮 905 82 42ms 1 Apr 2023 422nd sean-niemann 🇺🇸 905 82 42ms 12 Jul 2024 424th m-tkach 🇺🇦 904 72 110ms 16 Oct 2022 424th GrayJoKing 🇦🇺 904 72 113ms 22 Oct 2022 424th emplv 🇱🇻 904 72 111ms 27 Oct 2022 424th sean-niemann 🇺🇸 904 72 172ms 7 Mar 2025 428th DialFrost 🇸🇬 904 74 17ms 22 Feb 2026 428th Steffan153 🇫🇮 904 74 17ms 22 Feb 2026 428th GrayJoKing 🇦🇺 904 74 16ms 22 Feb 2026 428th GolfingSuccess 🇬🇷 904 74 16ms 24 Feb 2026 428th snoozingnewt 🇨🇦 904 74 16ms 4 Mar 2026 428th edsrzf 🇳🇿 904 74 16ms 26 days ago 434th stefangimmillaro 904 92 130ms 24 Oct 2023 434th inverseLorentz 🇦🇺 904 92 120ms 27 May 2024 434th sean-niemann 🇺🇸 904 92 129ms 8 Jun 2025 434th ian-h-chamberlain 🇺🇸 904 92 146ms 23 Nov 2025 438th michael-pruglo 🇺🇦 904 94 61ms 5 Jul 2022 438th zygoloid 904 94 60ms 5 Aug 2024 438th AdrienHache 🇫🇷 904 94 60ms 27 Dec 2025 441st Lydxn 🇨🇦 902 69 6ms 12 Sep 2022 441st GrayJoKing 🇦🇺 902 69 7ms 12 Sep 2022 441st btnlq 902 69 7ms 24 Sep 2022 444th Steffan153 🇫🇮 901 67 112ms 18 Dec 2022 444th Lydxn 🇨🇦 901 67 122ms 4 Feb 2023 444th sean-niemann 🇺🇸 901 67 110ms 7 Mar 2025 447th albanian-laundromat 901 107 274ms 22 Dec 2025 448th SirBogman 🇺🇸 900 50 516ms 5 May 2022 448th nwellnhof 🇩🇪 900 50 504ms 3 Jun 2022 448th Lydxn 🇨🇦 900 50 431ms 15 Aug 2022 448th Steffan153 🇫🇮 900 50 485ms 9 Aug 2024 452nd Lydxn 🇨🇦 900 72 353ms 16 Jul 2023 453rd Lydxn 🇨🇦 899 48 257ms 5 May 2022 453rd p-zubieta 899 48 299ms 6 Mar 2024 455th GrayJoKing 🇦🇺 899 70 2ms 6 May 2022 455th saito-ta 🇯🇵 899 70 2ms 21 Dec 2023 455th ovs-code 🇩🇪 899 70 2ms 17 Feb 2024 455th trinityy-7 899 70 2ms 7 Aug 2025 455th KasperKivimaeki 🇫🇮 899 70 6ms 8 Aug 2025 460th GrayJoKing 🇦🇺 899 91 30ms 19 Jan 2023 461st NickTheEASDude 🇺🇸 898 76 6ms 7 May 2024 461st edsrzf 🇳🇿 898 76 6ms 23 Dec 2025 461st Shanethegamer 🇺🇸 898 76 5ms 23 Dec 2025 461st jared-hughes 898 76 5ms 24 Dec 2025 461st Waffle3z 898 76 5ms 26 Dec 2025 461st Blendi-Goose 898 76 5ms 6 Feb 2026 461st kTheLemon 898 76 5ms 7 Mar 2026 468th edsrzf 🇳🇿 898 78 12ms 26 Oct 2024 469th DialFrost 🇸🇬 897 29 154ms 15 Mar 2025 470th Steffan153 🇫🇮 897 59 156ms 10 Aug 2024 470th rucin93 🇵🇱 897 59 144ms 13 Oct 2024 470th sean-niemann 🇺🇸 897 59 147ms 13 Oct 2024 470th lukegustafson 🇺🇸 897 59 140ms 24 Oct 2024 474th Ripick 897 73 122ms 8 May 2023 475th error256 897 81 30ms 15 days ago 476th ovs-code 🇩🇪 897 89 458ms 24 Jul 2024 476th jipsong 🇩🇪 897 89 450ms 7 Apr 2025 476th DialFrost 🇸🇬 897 89 485ms 24 Dec 2025 476th dokutan 897 89 425ms 8 Feb 2026 480th m-tkach 🇺🇦 897 117 25ms 7 May 2022 First Prev 401–480 of 3,663 Next Last