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 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 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers 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 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 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Bytes Time 591st yokasuretsu 901 74 13 Jan 2025 591st Artemis21 🇬🇧 901 74 17 Jan 2025 591st gdpr777 901 74 10 Feb 2025 591st Pyroan 901 74 27 Mar 2025 591st Squimbletin 901 74 19 Apr 2025 591st Kowalskiexe 🇵🇱 901 74 19 Apr 2025 591st Dandandooo 901 74 23 Apr 2025 591st khangtm123 901 74 4 May 2025 591st 40fied4t 901 74 6 May 2025 591st keelimeguy 🇺🇸 901 74 13 May 2025 591st TheZwierzLF 🇵🇱 901 74 21 May 2025 591st kbeat 🇰🇿 901 74 21 May 2025 591st LvLError 901 74 29 May 2025 591st Lv0Sys 🇵🇱 901 74 30 May 2025 591st ffelixm 901 74 3 Jun 2025 591st Flekay 🇩🇪 901 74 19 Jun 2025 591st DoubleUynn 901 74 25 Jun 2025 591st osNiko 🇧🇷 901 74 26 Jul 2025 591st wobblybits 901 74 13 Aug 2025 591st denisfouchard 901 74 23 Aug 2025 591st Emutis 🇱🇹 901 74 23 Aug 2025 591st edsrzf 🇳🇿 901 74 24 days ago 591st 1024An 🇮🇳 901 74 23 days ago 591st pauljoohyunkim 901 74 9 days ago 591st joll05 🇸🇪 901 74 3 days ago 591st retrohun 901 74 28 hours ago 702nd Lydxn 🇨🇦 900 108 6 May 2022 703rd SirBogman 🇺🇸 899 50 5 May 2022 703rd nwellnhof 🇩🇪 899 50 3 Jun 2022 703rd Lydxn 🇨🇦 899 50 15 Aug 2022 703rd Steffan153 🇫🇮 899 50 9 Aug 2024 707th DialFrost 🇸🇬 899 69 15 Jul 2024 708th Lydxn 🇨🇦 898 48 5 May 2022 708th pabloferz 898 48 6 Mar 2024 710th GrayJoKing 🇦🇺 898 70 6 May 2022 710th saito-ta 🇯🇵 898 70 21 Dec 2023 710th ovs-code 🇩🇪 898 70 17 Feb 2024 710th trinityy-7 898 70 7 Aug 2025 710th KasperKivimaeki 🇫🇮 898 70 8 Aug 2025 715th Lydxn 🇨🇦 898 72 16 Jul 2023 716th GrayJoKing 🇦🇺 898 91 19 Jan 2023 717th DialFrost 🇸🇬 897 29 15 Mar 2025 718th Steffan153 🇫🇮 897 59 10 Aug 2024 718th rucin93 🇵🇱 897 59 13 Oct 2024 718th sean-niemann 🇺🇸 897 59 13 Oct 2024 718th lukegustafson 🇺🇸 897 59 24 Oct 2024 722nd edsrzf 🇳🇿 897 78 26 Oct 2024 722nd kg583 🇺🇸 897 78 8 days ago 724th Ripick 896 73 8 May 2023 725th MichalMarsalek 🇨🇿 895 87 5 May 2022 725th Kloppermand 🇩🇰 895 87 7 Oct 2022 725th bwat2 895 87 6 Apr 2023 728th ovs-code 🇩🇪 895 89 24 Jul 2024 728th jipsong 🇩🇪 895 89 7 Apr 2025 730th oeb25 894 93 16 May 2022 730th snobee 🇨🇦 894 93 8 Dec 2022 730th logvp 894 93 2 Jan 2024 730th elgan65536 894 93 5 Mar 2024 730th smartiel 894 93 12 Aug 2024 730th trist224 🇫🇷 894 93 12 Aug 2024 730th nullie 894 93 19 Dec 2024 730th lolgeny 894 93 22 Feb 2025 738th Shanethegamer 🇺🇸 893 61 31 Oct 2022 738th MeWhenI 🇻🇦 893 61 4 Nov 2022 740th Steffan153 🇫🇮 892 52 31 Dec 2022 741st stefangimmillaro 892 71 2 Oct 2022 741st Steffan153 🇫🇮 892 71 23 Feb 2023 741st Shanethegamer 🇺🇸 892 71 16 May 2023 741st sean-niemann 🇺🇸 892 71 12 Jul 2024 745th JayXon 🇺🇸 892 74 14 Nov 2024 746th GolfingSuccess 🇬🇷 892 95 5 May 2022 746th Alex-x90 🇺🇸 892 95 4 Dec 2022 746th Mandrzejy 🇵🇱 892 95 22 Mar 2024 749th sean-niemann 🇺🇸 892 109 25 May 2024 749th CaedenHarper 🇨🇦 892 109 28 Jan 2025 First Prev 676–750 of 3,372 Next Last
