Collatz in all languages in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 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 Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 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 Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 812th b10011 🇫🇮 889 75 27ms 3 Jan 2023 812th 4ndyJ 🇬🇧 889 75 23ms 3 Jan 2023 812th randolchance 889 75 19ms 8 Jan 2023 812th LeeCamp 889 75 19ms 12 Jan 2023 812th hellwue 889 75 20ms 15 Feb 2023 812th nandanjp 889 75 20ms 29 Mar 2023 812th kaptsanovb 889 75 35ms 20 Apr 2023 812th galloj 🇨🇿 889 75 20ms 20 May 2023 812th jhu04 889 75 21ms 23 Jun 2023 812th HelloYuiYui 889 75 20ms 1 Nov 2023 812th tobyLovick 889 75 29ms 10 Nov 2023 812th VictorStenvers 🇳🇱 889 75 23ms 13 Nov 2023 812th RZ781 889 75 29ms 19 Nov 2023 812th mikehanus 889 75 27ms 21 Nov 2023 812th 1231234md5 🇨🇳 889 75 22ms 14 Dec 2023 812th Hebelub 889 75 23ms 6 Jan 2024 812th minhtrancccp 889 75 27ms 11 Jan 2024 812th 123mjb 889 75 34ms 25 Jan 2024 812th jbjd 889 75 23ms 25 Feb 2024 812th gabe-gallegos 889 75 23ms 2 May 2024 812th kejcao 🇨🇦 889 75 26ms 11 May 2024 812th f-tucker 889 75 23ms 24 May 2024 812th Florian-Mt 889 75 19ms 22 Jul 2024 812th codingisgreatbutiamnot 889 75 24ms 9 Aug 2024 812th Terobero 889 75 32ms 23 Aug 2024 812th abhishekg999 889 75 53ms 17 Sep 2024 812th RedzGoose 🇦🇺 889 75 22ms 7 Oct 2024 812th Clay-Goodling 889 75 24ms 8 Oct 2024 812th JunkIce 889 75 24ms 5 Mar 2025 812th jiji7879 889 75 23ms 20 Jun 2025 812th faragocsaba 889 75 26ms 22 Jun 2025 812th bknower 889 75 23ms 30 Jun 2025 812th clayboll99 889 75 28ms 14 Jul 2025 812th Nikinator2704 889 75 18ms 10 days ago 860th mousetail 🇳🇱 888 41 73ms 29 Aug 2025 861st MeWhenI 🇻🇦 888 53 41ms 1 Jun 2022 861st stefangimmillaro 888 53 38ms 2 Oct 2022 861st Haksell 🇦🇶 888 53 40ms 22 Feb 2023 864th primo-ppcg 🇹🇭 888 85 43ms 14 Jan 2025 864th MeWhenI 🇻🇦 888 85 44ms 21 Apr 2025 866th jared-hughes 888 130 23ms 15 Dec 2024 867th canissimia 🇦🇶 888 204 16ms 25 Nov 2023 868th albanian-laundromat 887 94 339ms 24 Sep 2025 868th kmathis22 887 94 340ms 14 Oct 2025 868th jkelly467 887 94 339ms 19 days ago 868th HumanoidCPU 887 94 337ms 3 days ago 872nd Shanethegamer 🇺🇸 886 70 93ms 12 Dec 2022 872nd Alessandro-Balconi 🇮🇹 886 70 88ms 26 Dec 2022 874th ovs-code 🇩🇪 886 73 300ms 22 Jul 2023 875th m-tkach 🇺🇦 886 112 69ms 22 Jun 2025 876th GolfingSuccess 🇬🇷 885 71 2ms 5 May 2022 876th emplv 🇱🇻 885 71 3ms 5 May 2022 876th JayXon 🇺🇸 885 71 2ms 7 May 2022 876th nwellnhof 🇩🇪 885 71 2ms 5 Jun 2022 876th stefangimmillaro 885 71 2ms 2 Jun 2023 876th 09cf 885 71 2ms 4 Oct 2023 876th kkoenig 885 71 3ms 21 Dec 2023 876th sean-niemann 🇺🇸 885 71 3ms 10 Jul 2024 876th masinag 🇮🇹 885 71 2ms 6 Oct 2024 885th SiestaGuru 885 88 325ms 9 Jan 2023 885th rifatx 885 88 312ms 5 Jul 2024 885th kmathis22 885 88 349ms 25 Sep 2025 885th arcpolaris 885 88 297ms 4 days ago 889th janbehrens 🇩🇪 885 90 442ms 21 Apr 2023 889th Yewzir 🇧🇪 885 90 463ms 22 Apr 2023 889th DialFrost 🇸🇬 885 90 440ms 6 Nov 2023 889th Ripick 885 90 439ms 27 Nov 2024 893rd m-tkach 🇺🇦 884 59 511ms 21 Jan 2024 893rd GolfingSuccess 🇬🇷 884 59 561ms 20 Jan 2025 895th nipzu 884 94 136ms 17 May 2022 895th Natanaelel 🇸🇪 884 94 136ms 17 Jun 2022 895th nkoppel 884 94 149ms 19 Oct 2022 895th ovs-code 🇩🇪 884 94 151ms 21 Jun 2023 895th mousetail 🇳🇱 884 94 142ms 12 Jan 2024 900th MeWhenI 🇻🇦 884 110 255ms 9 Feb 2023 First Prev 826–900 of 3,446 Next Last
