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 395th janbehrens 🇩🇪 907 59 13ms 17 May 2023 395th Shanethegamer 🇺🇸 907 59 15ms 25 May 2023 395th Maznek 907 59 11ms 26 Jun 2023 395th SpiritAxolotl 🇺🇸 907 59 14ms 20 Mar 2024 395th Andrey-Plotnikov 907 59 13ms 19 May 2024 395th emgordon154 907 59 10ms 5 Aug 2024 395th duckyluuk 🇳🇱 907 59 12ms 3 Oct 2024 395th lifthrasiir 🇰🇷 907 59 14ms 23 Nov 2024 395th fuzzylojik-golf 🇺🇸 907 59 12ms 1 Jun 2025 395th acollett89 907 59 11ms 17 Jun 2025 395th iczelia 🇩🇪 907 59 12ms 23 Sep 2025 395th Yax42 🇫🇷 907 59 10ms 20 Jan 2026 395th Protothor 907 59 12ms 26 days ago 414th MeWhenI 🇻🇦 907 71 139ms 20 Aug 2024 415th krcs 🇵🇱 907 86 397ms 10 May 2022 415th billings7 🇬🇧 907 86 407ms 15 May 2022 415th revlayle 🇺🇸 907 86 440ms 7 Dec 2022 415th Widgitty 907 86 429ms 1 Sep 2023 415th albanian-laundromat 🇺🇸 907 86 455ms 30 Sep 2025 420th piano-miles 907 92 411ms 24 Feb 2026 421st shinh 906 52 43ms 29 Jun 2022 422nd Lydxn 🇨🇦 906 64 181ms 1 Apr 2023 423rd DialFrost 🇸🇬 906 74 17ms 22 Feb 2026 423rd Steffan153 🇫🇮 906 74 22ms 22 Feb 2026 423rd GrayJoKing 🇦🇺 906 74 16ms 22 Feb 2026 423rd GolfingSuccess 🇬🇷 906 74 18ms 24 Feb 2026 423rd snoozingnewt 🇨🇦 906 74 18ms 4 Mar 2026 423rd edsrzf 🇳🇿 906 74 16ms 9 Mar 2026 429th Steffan153 🇫🇮 906 82 42ms 1 Apr 2023 429th sean-niemann 🇺🇸 906 82 42ms 12 Jul 2024 431st Lydxn 🇨🇦 905 70 101ms 7 May 2022 432nd m-tkach 🇺🇦 905 72 111ms 16 Oct 2022 432nd GrayJoKing 🇦🇺 905 72 112ms 22 Oct 2022 432nd emplv 🇱🇻 905 72 111ms 27 Oct 2022 432nd sean-niemann 🇺🇸 905 72 126ms 7 Mar 2025 436th stefangimmillaro 904 92 132ms 24 Oct 2023 436th inverseLorentz 🇦🇺 904 92 129ms 27 May 2024 436th sean-niemann 🇺🇸 904 92 140ms 8 Jun 2025 436th ian-h-chamberlain 🇺🇸 904 92 136ms 23 Nov 2025 440th michael-pruglo 🇺🇦 904 94 64ms 5 Jul 2022 440th zygoloid 904 94 62ms 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 Lydxn 🇨🇦 902 72 353ms 16 Jul 2023 447th Steffan153 🇫🇮 901 67 110ms 18 Dec 2022 447th Lydxn 🇨🇦 901 67 118ms 4 Feb 2023 447th sean-niemann 🇺🇸 901 67 110ms 7 Mar 2025 450th albanian-laundromat 🇺🇸 901 107 329ms 22 Dec 2025 451st SirBogman 🇺🇸 900 50 406ms 5 May 2022 451st nwellnhof 🇩🇪 900 50 405ms 3 Jun 2022 451st Lydxn 🇨🇦 900 50 484ms 15 Aug 2022 451st Steffan153 🇫🇮 900 50 555ms 9 Aug 2024 455th GrayJoKing 🇦🇺 900 91 30ms 19 Jan 2023 456th Lydxn 🇨🇦 899 48 273ms 5 May 2022 456th p-zubieta 899 48 295ms 6 Mar 2024 458th GrayJoKing 🇦🇺 899 70 2ms 6 May 2022 458th saito-ta 🇯🇵 899 70 2ms 21 Dec 2023 458th ovs-code 🇩🇪 899 70 2ms 17 Feb 2024 458th trinityy-7 899 70 2ms 7 Aug 2025 458th KasperKivimaeki 🇫🇮 899 70 6ms 8 Aug 2025 463rd NickTheEASDude 🇺🇸 899 76 6ms 7 May 2024 463rd edsrzf 🇳🇿 899 76 6ms 23 Dec 2025 463rd Shanethegamer 🇺🇸 899 76 5ms 23 Dec 2025 463rd jared-hughes 899 76 5ms 24 Dec 2025 463rd Waffle3z 899 76 5ms 26 Dec 2025 463rd Blendi-Goose 899 76 5ms 6 Feb 2026 463rd kTheLemon 899 76 5ms 7 Mar 2026 470th edsrzf 🇳🇿 899 78 12ms 26 Oct 2024 471st m-tkach 🇺🇦 899 117 25ms 7 May 2022 471st Lydxn 🇨🇦 899 117 26ms 7 May 2022 473rd Steffan153 🇫🇮 898 59 138ms 10 Aug 2024 473rd rucin93 🇵🇱 898 59 145ms 13 Oct 2024 473rd sean-niemann 🇺🇸 898 59 144ms 13 Oct 2024 473rd lukegustafson 🇺🇸 898 59 158ms 24 Oct 2024 477th Ripick 898 73 122ms 8 May 2023 478th ovs-code 🇩🇪 898 89 458ms 24 Jul 2024 478th jipsong 🇩🇪 898 89 450ms 7 Apr 2025 478th DialFrost 🇸🇬 898 89 485ms 24 Dec 2025 First Prev 401–480 of 3,770 Next Last