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 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 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 Transpose Sentence 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 Hilbert Curve Mandelbrot Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle 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 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 Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 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 Transpose Sentence 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 Hilbert Curve Mandelbrot Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Bytes Time 579th keelimeguy 🇺🇸 900 74 13 May 2025 579th TheZwierzLF 🇵🇱 900 74 21 May 2025 579th kbeat 🇰🇿 900 74 21 May 2025 579th LvLError 900 74 22 days ago 579th Lv0Sys 🇵🇱 900 74 21 days ago 579th ffelixm 900 74 16 days ago 579th Flekay 900 74 40 hours ago 683rd edsrzf 🇳🇿 900 83 14 Jan 2025 683rd kg583 🇺🇸 900 83 14 Feb 2025 685th SirBogman 🇺🇸 899 50 5 May 2022 685th nwellnhof 🇩🇪 899 50 3 Jun 2022 685th Lydxn 🇨🇦 899 50 15 Aug 2022 685th Steffan153 🇫🇮 899 50 9 Aug 2024 689th Steffan153 🇫🇮 899 82 1 Apr 2023 689th sean-niemann 🇺🇸 899 82 12 Jul 2024 691st DialFrost 🇸🇬 897 29 15 Mar 2025 692nd Lydxn 🇨🇦 897 48 5 May 2022 692nd pabloferz 897 48 6 Mar 2024 694th GrayJoKing 🇦🇺 897 70 6 May 2022 694th saito-ta 🇯🇵 897 70 21 Dec 2023 694th ovs-code 🇩🇪 897 70 17 Feb 2024 697th nwellnhof 🇩🇪 897 111 4 May 2022 697th emplv 🇱🇻 897 111 5 May 2022 697th Shanethegamer 🇺🇸 897 111 21 Nov 2023 700th Steffan153 🇫🇮 896 59 10 Aug 2024 700th rucin93 🇵🇱 896 59 13 Oct 2024 700th sean-niemann 🇺🇸 896 59 13 Oct 2024 700th lukegustafson 🇺🇸 896 59 24 Oct 2024 704th DialFrost 🇸🇬 896 69 15 Jul 2024 705th edsrzf 🇳🇿 895 78 26 Oct 2024 706th SiestaGuru 895 131 9 Jan 2023 706th HumanoidCPU 895 131 7 May 2024 708th Ripick 894 73 8 May 2023 709th MichalMarsalek 🇨🇿 894 87 5 May 2022 709th Kloppermand 🇩🇰 894 87 7 Oct 2022 709th bwat2 894 87 6 Apr 2023 712th ovs-code 🇩🇪 894 89 24 Jul 2024 712th jipsong 🇩🇪 894 89 7 Apr 2025 714th Lydxn 🇨🇦 893 72 16 Jul 2023 715th GrayJoKing 🇦🇺 893 91 19 Jan 2023 716th JayXon 🇺🇸 893 150 8 Sep 2023 717th oeb25 892 93 16 May 2022 717th snobee 🇨🇦 892 93 8 Dec 2022 717th logvp 892 93 2 Jan 2024 717th elgan65536 892 93 5 Mar 2024 717th smartiel 892 93 12 Aug 2024 717th trist224 🇫🇷 892 93 12 Aug 2024 717th nullie 892 93 19 Dec 2024 717th lolgeny 892 93 22 Feb 2025 725th Steffan153 🇫🇮 891 52 31 Dec 2022 726th KatieLG 🇬🇧 891 60 4 May 2022 726th ScottHamper 891 60 5 May 2022 726th Re-Adventures 🇮🇳 891 60 5 May 2022 726th 0x24a537r9 891 60 29 Jul 2022 726th stefangabos 🇷🇴 891 60 19 Aug 2022 726th eranws 891 60 10 Sep 2022 726th GeorgeStechman 🇬🇧 891 60 26 Sep 2022 726th BloodStormKnight 891 60 15 Oct 2022 726th dzshn 891 60 3 Dec 2022 726th biocommando 🇫🇮 891 60 20 Dec 2022 726th Betuaredead 891 60 5 Jan 2023 726th piano-miles 891 60 16 Jan 2023 726th Yewzir 🇧🇪 891 60 12 Feb 2023 726th shellbertt 🇨🇦 891 60 26 Feb 2023 726th zakariamouhid 891 60 20 May 2023 726th raphaelimahorn 891 60 23 Aug 2023 726th jbt 891 60 25 Dec 2023 726th olleicua 🇺🇸 891 60 15 Feb 2024 726th HumanoidCPU 891 60 3 May 2024 726th dokutan 891 60 13 Aug 2024 726th LostSyntax21 🇬🇧 891 60 10 Sep 2024 726th xyangst 891 60 28 Sep 2024 726th a6166231 🇨🇳 891 60 15 May 2025 749th Shanethegamer 🇺🇸 891 61 31 Oct 2022 749th MeWhenI 🇻🇦 891 61 4 Nov 2022 Prev 676–750 of 3,149 Next