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 796th MeWhenI 🇻🇦 874 72 2ms 7 May 2023 796th ListeriaM 874 72 2ms 22 Aug 2023 796th JohandeRuiter 🇳🇱 874 72 3ms 14 Sep 2024 796th larcherMTT 874 72 2ms 5 Oct 2024 796th snyderek 🇺🇸 874 72 2ms 19 Feb 2025 796th 5quiwyrm 874 72 2ms 29 Jun 2025 796th TeodorDyakov 🇧🇬 874 72 3ms 8 Jul 2025 796th xiaoyiming123 874 72 2ms 12 Jul 2025 809th Shanethegamer 🇺🇸 874 85 38ms 15 May 2023 809th albanian-laundromat 🇺🇸 874 85 40ms 25 Aug 2025 811th JayXon 🇺🇸 874 158 1,799ms 14 Sep 2025 812th DialFrost 🇸🇬 873 64 5ms 10 Jul 2024 813th dieggsy 873 97 31ms 8 Oct 2024 814th ovs-code 🇩🇪 873 133 42ms 8 Jul 2024 815th Andriamanitra 🇫🇮 872 54 46ms 21 Jul 2022 815th jared-hughes 872 54 45ms 12 Sep 2022 815th OhmNomNom 872 54 41ms 7 Oct 2022 815th olleicua 🇺🇸 872 54 41ms 21 Jan 2024 815th LostSyntax21 🇬🇧 872 54 40ms 12 Mar 2025 815th AbrahamJLR 🇻🇪 872 54 44ms 4 Jun 2025 815th vishal-mohanty 872 54 43ms 25 Aug 2025 815th madex 🇩🇪 872 54 200ms 16 days ago 823rd ulucs 871 35 9ms 8 May 2022 823rd bstrat 871 35 9ms 6 Jun 2024 823rd wh3n3v3r 🇨🇿 871 35 8ms 18 Nov 2024 826th scpchicken 🇵🇼 871 45 406ms 4 May 2022 826th SirBogman 🇺🇸 871 45 274ms 5 May 2022 828th TFeld00 🇩🇰 871 71 25ms 17 May 2022 828th DialFrost 🇸🇬 871 71 26ms 15 Nov 2022 828th StefanHabel 🇨🇦 871 71 20ms 29 Nov 2022 828th nstearns96 🇬🇧 871 71 25ms 11 Jan 2023 828th hallvabo 🇳🇴 871 71 20ms 7 Feb 2023 828th anter69 🇭🇺 871 71 18ms 21 May 2024 828th rucin93 🇵🇱 871 71 19ms 10 Jul 2024 828th lelbal 871 71 20ms 26 Aug 2025 828th HETHAT 🇩🇿 871 71 23ms 23 Sep 2025 828th 09cf 871 71 17ms 18 Nov 2025 828th CommandLeo 🇮🇹 871 71 26ms 8 Jan 2026 828th Flekay 🇩🇪 871 71 20ms 12 Feb 2026 828th snoozingnewt 🇨🇦 871 71 20ms 13 Feb 2026 828th JOrE20 871 71 16ms 25 Feb 2026 828th scpchicken 🇵🇼 871 71 17ms 7 days ago 843rd Frowny 869 38 40ms 5 May 2022 843rd stackofbears 869 38 42ms 14 Mar 2025 845th 123mjb 869 96 366ms 20 Nov 2025 845th noescareno 869 96 366ms 21 Nov 2025 847th nwellnhof 🇩🇪 869 111 308ms 4 May 2022 847th emplv 🇱🇻 869 111 348ms 5 May 2022 847th Shanethegamer 🇺🇸 869 111 309ms 21 Nov 2023 850th pardouin 🇫🇷 868 61 145ms 7 Aug 2024 851st steffan-polygolf 868 73 97ms 23 Feb 2023 851st MWI-polygolf 868 73 93ms 6 Dec 2023 851st HumanoidCPU 868 73 91ms 7 May 2024 854th MeWhenI 🇻🇦 868 92 467ms 10 Oct 2022 854th Betuaredead 868 92 480ms 5 Jan 2023 854th Yax42 🇫🇷 868 92 459ms 4 Oct 2025 857th Yewzir 🇧🇪 868 159 1,610ms 3 days ago 858th TylerBloom 867 96 133ms 22 Mar 2024 859th shellbertt 🇨🇦 867 98 63ms 9 May 2022 859th iakolzin 867 98 57ms 26 May 2022 859th Betuaredead 867 98 60ms 5 Jan 2023 859th oceko 867 98 74ms 19 Feb 2024 859th cuzdav 867 98 63ms 4 May 2025 859th timhaj 🇸🇮 867 98 65ms 12 Sep 2025 859th Yax42 🇫🇷 867 98 54ms 4 Oct 2025 859th liamjermy6 867 98 61ms 19 days ago 867th 5quiwyrm 866 52 262ms 4 Sep 2022 867th MeWhenI 🇻🇦 866 52 278ms 28 Jan 2023 867th Feniske 🇫🇷 866 52 301ms 7 Nov 2023 867th dcgjb 866 52 278ms 29 Jan 2024 867th JPRuskin 🇬🇧 866 52 314ms 7 Apr 2025 867th IISResetMe 866 52 327ms 7 Apr 2025 867th Ripick 866 52 281ms 1 Jun 2025 867th madex 🇩🇪 866 52 300ms 16 Mar 2026 875th typeswitch-dev 🇵🇹 866 75 4ms 22 Jul 2023 876th bac0id 866 90 399ms 26 Sep 2023 876th deadp4nda 🇩🇪 866 90 415ms 26 Apr 2024 876th 123mjb 866 90 409ms 23 Jun 2025 876th michelebastione 🇮🇹 866 90 435ms 24 Aug 2025 876th razvandmtr 🇷🇴 866 90 425ms 6 Nov 2025 First Prev 801–880 of 3,760 Next Last