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 Crossword 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 Crossword 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 64th tayloia 🇬🇧 955 56 10ms 10 Jul 2023 64th Argeento 🇵🇱 955 56 10ms 25 Aug 2023 64th weliveinhell 🇭🇹 955 56 11ms 2 Oct 2023 64th coreynash 955 56 9ms 6 Oct 2023 64th dylanarmstrong 955 56 15ms 10 Dec 2023 64th two-bad 🇬🇧 955 56 11ms 23 Feb 2024 64th mehbark 955 56 14ms 27 Jul 2024 64th madeforlosers 955 56 11ms 4 Nov 2024 64th XenThe 🇬🇧 955 56 11ms 6 Jun 2025 64th Tristanchaang 955 56 10ms 2 days ago 86th Lydxn 🇨🇦 953 89 55ms 6 May 2022 86th JayXon 🇺🇸 953 89 55ms 7 May 2022 86th nwellnhof 🇩🇪 953 89 61ms 5 Jun 2022 86th snyderek 🇺🇸 953 89 56ms 19 Feb 2025 90th 2bular 952 32 27ms 17 Oct 2024 91st ovs-code 🇩🇪 950 61 265ms 5 Aug 2024 92nd Lydxn 🇨🇦 950 82 366ms 6 May 2022 92nd JayXon 🇺🇸 950 82 406ms 9 May 2022 94th Lydxn 🇨🇦 949 59 9ms 6 May 2022 95th Lydxn 🇨🇦 948 55 801ms 16 Jan 2024 95th ovs-code 🇩🇪 948 55 712ms 16 Jan 2024 95th Steffan153 🇫🇮 948 55 425ms 16 Jan 2024 95th kg583 🇺🇸 948 55 489ms 16 Feb 2024 95th Shanethegamer 🇺🇸 948 55 467ms 24 Mar 2024 95th pardouin 🇫🇷 948 55 538ms 30 Jun 2024 95th JayXon 🇺🇸 948 55 421ms 17 Aug 2024 95th sean-niemann 🇺🇸 948 55 474ms 24 Jan 2025 103rd primo-ppcg 🇹🇭 947 49 7ms 5 May 2022 103rd Lydxn 🇨🇦 947 49 7ms 8 May 2022 105th JayXon 🇺🇸 947 88 331ms 24 Sep 2025 106th lyphyser 946 46 52ms 13 Jan 2024 106th AdrienHache 🇫🇷 946 46 51ms 9 Apr 2024 108th saito-ta 🇯🇵 945 49 61ms 13 May 2022 108th Lydxn 🇨🇦 945 49 65ms 28 May 2022 110th JayXon 🇺🇸 945 88 154ms 17 Oct 2022 110th acotis 945 88 122ms 9 Jun 2025 110th kumavale 945 88 125ms 7 Oct 2025 113th JayXon 🇺🇸 943 69 5ms 17 Oct 2022 113th Lydxn 🇨🇦 943 69 5ms 4 Feb 2023 115th canissimia 🇦🇶 941 50 41ms 5 May 2022 115th ovs-code 🇩🇪 941 50 279ms 7 May 2022 115th sisyphus-ppcg 🇦🇺 941 50 37ms 20 Feb 2023 115th Steffan153 🇫🇮 941 50 42ms 20 Jul 2024 115th sean-niemann 🇺🇸 941 50 41ms 9 Jun 2025 115th pardouin 🇫🇷 941 50 50ms 22 Aug 2025 121st canissimia 🇦🇶 940 51 927ms 6 May 2022 121st Lydxn 🇨🇦 940 51 1,001ms 6 May 2022 121st primo-ppcg 🇹🇭 940 51 930ms 6 May 2022 121st pardouin 🇫🇷 940 51 953ms 12 Apr 2025 125th inventshah 939 57 10ms 4 May 2022 125th itsh01 939 57 11ms 17 May 2022 125th Natanaelel 🇸🇪 939 57 11ms 16 Jun 2022 125th Attero 🇸🇪 939 57 10ms 3 Aug 2022 125th SirFireball3521 939 57 10ms 26 Jan 2023 125th Kacarott 🇦🇺 939 57 13ms 24 Mar 2023 125th nathanadams 🇳🇿 939 57 10ms 24 Apr 2023 125th hacker112 🇸🇪 939 57 13ms 20 Jun 2024 125th thisishowmymindworks 🇳🇴 939 57 11ms 28 Jun 2024 125th Salutations45 939 57 13ms 18 Nov 2024 125th daniel-cardone 939 57 10ms 3 Jul 2025 125th CaedenHarper 🇨🇦 939 57 11ms 28 Sep 2025 125th BrunoVisnadi 🇧🇷 939 57 11ms 25 days ago 125th Laellekoenig 939 57 10ms 24 days ago 125th JOrE20 939 57 11ms 10 days ago 140th primo-ppcg 🇹🇭 939 58 5ms 13 Nov 2022 140th clockworknazo 939 58 8ms 15 Nov 2022 140th Lydxn 🇨🇦 939 58 5ms 7 Feb 2023 140th xsot 🇸🇬 939 58 6ms 28 Jun 2024 140th Salutations45 939 58 8ms 18 Dec 2024 145th Irratix 🇳🇱 938 83 409ms 4 May 2022 145th nwellnhof 🇩🇪 938 83 323ms 4 May 2022 145th ScottHamper 938 83 376ms 5 May 2022 145th Romain-1 🇫🇷 938 83 339ms 1 Jun 2022 145th Gaddy 🇫🇷 938 83 426ms 1 Jun 2022 145th 5quiwyrm 938 83 381ms 4 Sep 2022 First Prev 76–150 of 3,467 Next Last