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 789th xiaoyiming123 874 72 2ms 12 Jul 2025 802nd Steffan153 🇫🇮 874 83 465ms 9 Apr 2023 802nd ovs-code 🇩🇪 874 83 57ms 1 Jul 2024 804th Shanethegamer 🇺🇸 874 98 110ms 15 Apr 2025 804th GolfingSuccess 🇬🇷 874 98 102ms 28 Nov 2025 804th DialFrost 🇸🇬 874 98 117ms 1 Dec 2025 807th DialFrost 🇸🇬 873 64 5ms 10 Jul 2024 808th Shanethegamer 🇺🇸 873 85 38ms 15 May 2023 808th albanian-laundromat 873 85 40ms 25 Aug 2025 810th Andriamanitra 🇫🇮 872 54 42ms 21 Jul 2022 810th jared-hughes 872 54 39ms 12 Sep 2022 810th OhmNomNom 872 54 41ms 7 Oct 2022 810th olleicua 🇺🇸 872 54 44ms 21 Jan 2024 810th LostSyntax21 🇬🇧 872 54 41ms 12 Mar 2025 810th AbrahamJLR 🇻🇪 872 54 40ms 4 Jun 2025 810th vishal-mohanty 872 54 39ms 25 Aug 2025 810th madex 🇩🇪 872 54 39ms 17 hours ago 818th dieggsy 872 97 28ms 8 Oct 2024 819th ulucs 871 35 9ms 8 May 2022 819th bstrat 871 35 9ms 6 Jun 2024 819th wh3n3v3r 🇨🇿 871 35 8ms 18 Nov 2024 822nd scpchicken 🇵🇼 871 45 406ms 4 May 2022 822nd SirBogman 🇺🇸 871 45 274ms 5 May 2022 824th TFeld00 🇩🇰 871 71 25ms 17 May 2022 824th DialFrost 🇸🇬 871 71 25ms 15 Nov 2022 824th StefanHabel 🇨🇦 871 71 18ms 29 Nov 2022 824th nstearns96 🇬🇧 871 71 21ms 11 Jan 2023 824th hallvabo 🇳🇴 871 71 19ms 7 Feb 2023 824th anter69 🇭🇺 871 71 18ms 21 May 2024 824th rucin93 🇵🇱 871 71 17ms 10 Jul 2024 824th lelbal 871 71 20ms 26 Aug 2025 824th HETHAT 🇩🇿 871 71 23ms 23 Sep 2025 824th 09cf 871 71 18ms 18 Nov 2025 824th CommandLeo 🇮🇹 871 71 23ms 8 Jan 2026 824th Flekay 🇩🇪 871 71 17ms 12 Feb 2026 824th snoozingnewt 🇨🇦 871 71 18ms 13 Feb 2026 824th JOrE20 871 71 16ms 25 Feb 2026 838th ovs-code 🇩🇪 871 133 42ms 8 Jul 2024 839th emgordon154 870 160 1,606ms 24 Dec 2025 839th DialFrost 🇸🇬 870 160 1,779ms 17 Jan 2026 841st Steffan153 🇫🇮 869 82 1,323ms 23 Feb 2023 842nd 123mjb 869 96 366ms 20 Nov 2025 842nd noescareno 869 96 366ms 21 Nov 2025 844th Frowny 868 38 40ms 5 May 2022 844th stackofbears 868 38 42ms 14 Mar 2025 846th steffan-polygolf 868 73 92ms 23 Feb 2023 846th MWI-polygolf 868 73 92ms 6 Dec 2023 846th HumanoidCPU 868 73 82ms 7 May 2024 849th nwellnhof 🇩🇪 868 111 301ms 4 May 2022 849th emplv 🇱🇻 868 111 294ms 5 May 2022 849th Shanethegamer 🇺🇸 868 111 293ms 21 Nov 2023 852nd pardouin 🇫🇷 867 61 156ms 7 Aug 2024 853rd MeWhenI 🇻🇦 867 92 467ms 10 Oct 2022 853rd Betuaredead 867 92 480ms 5 Jan 2023 853rd Yax42 🇫🇷 867 92 470ms 4 Oct 2025 856th TylerBloom 867 96 123ms 22 Mar 2024 857th shellbertt 🇨🇦 867 98 61ms 9 May 2022 857th iakolzin 867 98 58ms 26 May 2022 857th Betuaredead 867 98 62ms 5 Jan 2023 857th oceko 867 98 60ms 19 Feb 2024 857th cuzdav 867 98 60ms 4 May 2025 857th timhaj 🇸🇮 867 98 58ms 12 Sep 2025 857th Yax42 🇫🇷 867 98 61ms 4 Oct 2025 857th liamjermy6 867 98 66ms 4 days ago 865th 5quiwyrm 866 52 304ms 4 Sep 2022 865th MeWhenI 🇻🇦 866 52 318ms 28 Jan 2023 865th Feniske 🇫🇷 866 52 317ms 7 Nov 2023 865th dcgjb 866 52 279ms 29 Jan 2024 865th JPRuskin 🇬🇧 866 52 314ms 7 Apr 2025 865th IISResetMe 866 52 325ms 7 Apr 2025 865th Ripick 866 52 315ms 1 Jun 2025 865th madex 🇩🇪 866 52 363ms 20 days ago 873rd bac0id 866 90 354ms 26 Sep 2023 873rd deadp4nda 🇩🇪 866 90 374ms 26 Apr 2024 873rd 123mjb 866 90 367ms 23 Jun 2025 873rd michelebastione 🇮🇹 866 90 400ms 24 Aug 2025 873rd razvandmtr 🇷🇴 866 90 395ms 6 Nov 2025 878th Andriamanitra 🇫🇮 865 67 144ms 26 Apr 2023 879th MeWhenI 🇻🇦 865 81 8ms 23 May 2023 880th DialFrost 🇸🇬 865 84 17ms 1 Jan 2026 First Prev 801–880 of 3,666 Next Last