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 793rd larcherMTT 874 72 2ms 5 Oct 2024 793rd snyderek 🇺🇸 874 72 2ms 19 Feb 2025 793rd 5quiwyrm 874 72 2ms 29 Jun 2025 793rd TeodorDyakov 🇧🇬 874 72 3ms 8 Jul 2025 793rd xiaoyiming123 874 72 2ms 12 Jul 2025 806th Shanethegamer 🇺🇸 874 85 38ms 15 May 2023 806th albanian-laundromat 🇺🇸 874 85 40ms 25 Aug 2025 808th DialFrost 🇸🇬 873 64 5ms 10 Jul 2024 809th dieggsy 873 97 31ms 8 Oct 2024 810th ovs-code 🇩🇪 873 133 42ms 8 Jul 2024 811th Andriamanitra 🇫🇮 872 54 42ms 21 Jul 2022 811th jared-hughes 872 54 39ms 12 Sep 2022 811th OhmNomNom 872 54 41ms 7 Oct 2022 811th olleicua 🇺🇸 872 54 44ms 21 Jan 2024 811th LostSyntax21 🇬🇧 872 54 41ms 12 Mar 2025 811th AbrahamJLR 🇻🇪 872 54 40ms 4 Jun 2025 811th vishal-mohanty 872 54 39ms 25 Aug 2025 811th madex 🇩🇪 872 54 39ms 4 days ago 819th emgordon154 872 160 1,606ms 24 Dec 2025 819th DialFrost 🇸🇬 872 160 1,763ms 17 Jan 2026 821st ulucs 871 35 9ms 8 May 2022 821st bstrat 871 35 9ms 6 Jun 2024 821st wh3n3v3r 🇨🇿 871 35 8ms 18 Nov 2024 824th scpchicken 🇵🇼 871 45 406ms 4 May 2022 824th SirBogman 🇺🇸 871 45 274ms 5 May 2022 826th TFeld00 🇩🇰 871 71 25ms 17 May 2022 826th DialFrost 🇸🇬 871 71 26ms 15 Nov 2022 826th StefanHabel 🇨🇦 871 71 20ms 29 Nov 2022 826th nstearns96 🇬🇧 871 71 25ms 11 Jan 2023 826th hallvabo 🇳🇴 871 71 20ms 7 Feb 2023 826th anter69 🇭🇺 871 71 18ms 21 May 2024 826th rucin93 🇵🇱 871 71 19ms 10 Jul 2024 826th lelbal 871 71 20ms 26 Aug 2025 826th HETHAT 🇩🇿 871 71 23ms 23 Sep 2025 826th 09cf 871 71 17ms 18 Nov 2025 826th CommandLeo 🇮🇹 871 71 26ms 8 Jan 2026 826th Flekay 🇩🇪 871 71 20ms 12 Feb 2026 826th snoozingnewt 🇨🇦 871 71 20ms 13 Feb 2026 826th JOrE20 871 71 16ms 25 Feb 2026 840th Steffan153 🇫🇮 870 82 1,323ms 23 Feb 2023 841st Frowny 869 38 40ms 5 May 2022 841st stackofbears 869 38 42ms 14 Mar 2025 843rd 123mjb 869 96 366ms 20 Nov 2025 843rd noescareno 869 96 366ms 21 Nov 2025 845th nwellnhof 🇩🇪 869 111 308ms 4 May 2022 845th emplv 🇱🇻 869 111 348ms 5 May 2022 845th Shanethegamer 🇺🇸 869 111 309ms 21 Nov 2023 848th pardouin 🇫🇷 868 61 162ms 7 Aug 2024 849th steffan-polygolf 868 73 92ms 23 Feb 2023 849th MWI-polygolf 868 73 92ms 6 Dec 2023 849th HumanoidCPU 868 73 82ms 7 May 2024 852nd MeWhenI 🇻🇦 868 92 467ms 10 Oct 2022 852nd Betuaredead 868 92 480ms 5 Jan 2023 852nd Yax42 🇫🇷 868 92 459ms 4 Oct 2025 855th TylerBloom 867 96 123ms 22 Mar 2024 856th shellbertt 🇨🇦 867 98 63ms 9 May 2022 856th iakolzin 867 98 57ms 26 May 2022 856th Betuaredead 867 98 60ms 5 Jan 2023 856th oceko 867 98 74ms 19 Feb 2024 856th cuzdav 867 98 63ms 4 May 2025 856th timhaj 🇸🇮 867 98 65ms 12 Sep 2025 856th Yax42 🇫🇷 867 98 54ms 4 Oct 2025 856th liamjermy6 867 98 61ms 7 days ago 864th 5quiwyrm 866 52 304ms 4 Sep 2022 864th MeWhenI 🇻🇦 866 52 265ms 28 Jan 2023 864th Feniske 🇫🇷 866 52 295ms 7 Nov 2023 864th dcgjb 866 52 279ms 29 Jan 2024 864th JPRuskin 🇬🇧 866 52 263ms 7 Apr 2025 864th IISResetMe 866 52 278ms 7 Apr 2025 864th Ripick 866 52 295ms 1 Jun 2025 864th madex 🇩🇪 866 52 277ms 23 days ago 872nd bac0id 866 90 354ms 26 Sep 2023 872nd deadp4nda 🇩🇪 866 90 374ms 26 Apr 2024 872nd 123mjb 866 90 367ms 23 Jun 2025 872nd michelebastione 🇮🇹 866 90 378ms 24 Aug 2025 872nd razvandmtr 🇷🇴 866 90 387ms 6 Nov 2025 877th ovs-code 🇩🇪 866 161 1,719ms 14 Sep 2025 877th Yewzir 🇧🇪 866 161 1,812ms 14 Nov 2025 879th Andriamanitra 🇫🇮 865 67 144ms 26 Apr 2023 880th typeswitch-dev 🇵🇹 865 75 4ms 22 Jul 2023 First Prev 801–880 of 3,729 Next Last