Collatz in all languages in chars. 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 Chars Time 449th btnlq 893 69 24 Sep 2022 452nd Steffan153 🇫🇮 893 82 1 Apr 2023 452nd sean-niemann 🇺🇸 893 82 12 Jul 2024 454th edsrzf 🇳🇿 893 83 14 Jan 2025 454th kg583 🇺🇸 893 83 14 Feb 2025 456th emplv 🇱🇻 893 110 5 May 2022 456th Shanethegamer 🇺🇸 893 110 21 Nov 2023 456th edsrzf 🇳🇿 893 110 28 Nov 2024 459th SiestaGuru 892 131 9 Jan 2023 459th HumanoidCPU 892 131 7 May 2024 461st SirBogman 🇺🇸 891 50 5 May 2022 461st nwellnhof 🇩🇪 891 50 3 Jun 2022 461st Lydxn 🇨🇦 891 50 15 Aug 2022 461st Steffan153 🇫🇮 891 50 9 Aug 2024 465th MichalMarsalek 🇨🇿 891 87 5 May 2022 465th Kloppermand 🇩🇰 891 87 7 Oct 2022 465th bwat2 891 87 6 Apr 2023 468th pabloferz 889 48 6 Mar 2024 469th edsrzf 🇳🇿 889 78 26 Oct 2024 470th oeb25 889 93 16 May 2022 470th snobee 🇨🇦 889 93 8 Dec 2022 470th logvp 889 93 2 Jan 2024 470th elgan65536 889 93 5 Mar 2024 470th smartiel 889 93 12 Aug 2024 470th trist224 🇫🇷 889 93 12 Aug 2024 470th nullie 889 93 19 Dec 2024 470th lolgeny 889 93 22 Feb 2025 478th JayXon 🇺🇸 889 149 21 May 2024 479th GolfingSuccess 🇬🇷 888 95 5 May 2022 479th Alex-x90 🇺🇸 888 95 4 Dec 2022 479th Mandrzejy 🇵🇱 888 95 22 Mar 2024 482nd KatieLG 🇬🇧 887 60 4 May 2022 482nd ScottHamper 887 60 5 May 2022 482nd Re-Adventures 🇮🇳 887 60 5 May 2022 482nd 0x24a537r9 887 60 29 Jul 2022 482nd stefangabos 🇷🇴 887 60 19 Aug 2022 482nd eranws 887 60 10 Sep 2022 482nd GeorgeStechman 🇬🇧 887 60 26 Sep 2022 482nd BloodStormKnight 887 60 15 Oct 2022 482nd dzshn 887 60 3 Dec 2022 482nd biocommando 🇫🇮 887 60 20 Dec 2022 482nd Betuaredead 887 60 5 Jan 2023 482nd piano-miles 887 60 16 Jan 2023 482nd Yewzir 🇧🇪 887 60 12 Feb 2023 482nd shellbertt 🇨🇦 887 60 26 Feb 2023 482nd zakariamouhid 887 60 20 May 2023 482nd raphaelimahorn 887 60 23 Aug 2023 482nd jbt 887 60 25 Dec 2023 482nd olleicua 🇺🇸 887 60 15 Feb 2024 482nd HumanoidCPU 887 60 3 May 2024 482nd dokutan 887 60 13 Aug 2024 482nd LostSyntax21 🇬🇧 887 60 10 Sep 2024 482nd xyangst 887 60 28 Sep 2024 482nd a6166231 🇨🇳 887 60 15 May 2025 505th Ripick 887 73 8 May 2023 506th GrayJoKing 🇦🇺 887 91 19 Jan 2023 507th P-Quentin 🇫🇷 886 63 3 Aug 2022 507th kaptsanovb 886 63 20 Apr 2023 507th fkantelberg 886 63 14 Jul 2023 507th snoozingnewt 🇺🇸 886 63 10 Sep 2023 507th VictorStenvers 🇳🇱 886 63 13 Nov 2023 507th 1231234md5 🇨🇳 886 63 14 Dec 2023 507th f-tucker 886 63 6 Feb 2024 507th JunkIce 886 63 24 Nov 2024 507th Kowalskiexe 🇵🇱 886 63 19 Apr 2025 507th 123mjb 886 63 23 days ago 517th Steffan153 🇫🇮 886 80 15 Nov 2022 517th error256 886 80 8 Apr 2025 519th c0d3-4-F00d 🇩🇪 886 132 6 May 2022 519th madeforlosers 886 132 26 Oct 2023 519th Blockyheadman 886 132 1 Nov 2023 519th SpiritAxolotl 🇺🇸 886 132 20 Mar 2024 523rd canissimia 🇦🇶 886 204 25 Nov 2023 524th lynn 885 65 5 May 2022 524th GrayJoKing 🇦🇺 885 65 5 May 2022 Prev 451–525 of 3,132 Next