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 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 Chars Time 451st trinityy-7 894 69 7 Aug 2025 452nd SirBogman 🇺🇸 892 50 5 May 2022 452nd nwellnhof 🇩🇪 892 50 3 Jun 2022 452nd Lydxn 🇨🇦 892 50 15 Aug 2022 452nd Steffan153 🇫🇮 892 50 9 Aug 2024 456th GrayJoKing 🇦🇺 892 91 19 Jan 2023 457th Lydxn 🇨🇦 891 72 16 Jul 2023 458th edsrzf 🇳🇿 891 78 26 Oct 2024 458th kg583 🇺🇸 891 78 9 days ago 460th MichalMarsalek 🇨🇿 891 87 5 May 2022 460th Kloppermand 🇩🇰 891 87 7 Oct 2022 460th bwat2 891 87 6 Apr 2023 463rd oeb25 890 93 16 May 2022 463rd snobee 🇨🇦 890 93 8 Dec 2022 463rd logvp 890 93 2 Jan 2024 463rd elgan65536 890 93 5 Mar 2024 463rd smartiel 890 93 12 Aug 2024 463rd trist224 🇫🇷 890 93 12 Aug 2024 463rd nullie 890 93 19 Dec 2024 463rd lolgeny 890 93 22 Feb 2025 471st pabloferz 889 48 6 Mar 2024 472nd Ripick 889 73 8 May 2023 473rd Steffan153 🇫🇮 889 80 15 Nov 2022 473rd error256 889 80 8 Apr 2025 475th GolfingSuccess 🇬🇷 889 95 5 May 2022 475th Alex-x90 🇺🇸 889 95 4 Dec 2022 475th Mandrzejy 🇵🇱 889 95 22 Mar 2024 478th KatieLG 🇬🇧 888 60 4 May 2022 478th ScottHamper 888 60 5 May 2022 478th Re-Adventures 🇮🇳 888 60 5 May 2022 478th 0x24a537r9 888 60 29 Jul 2022 478th stefangabos 🇷🇴 888 60 19 Aug 2022 478th eranws 888 60 10 Sep 2022 478th GeorgeStechman 🇬🇧 888 60 26 Sep 2022 478th BloodStormKnight 888 60 15 Oct 2022 478th dzshn 888 60 3 Dec 2022 478th biocommando 🇫🇮 888 60 20 Dec 2022 478th Betuaredead 888 60 5 Jan 2023 478th piano-miles 888 60 16 Jan 2023 478th Yewzir 🇧🇪 888 60 12 Feb 2023 478th shellbertt 🇨🇦 888 60 26 Feb 2023 478th zakariamouhid 888 60 20 May 2023 478th raphaelimahorn 888 60 23 Aug 2023 478th jbt 888 60 25 Dec 2023 478th olleicua 🇺🇸 888 60 15 Feb 2024 478th HumanoidCPU 888 60 3 May 2024 478th dokutan 888 60 13 Aug 2024 478th LostSyntax21 🇬🇧 888 60 10 Sep 2024 478th xyangst 888 60 28 Sep 2024 478th a6166231 🇨🇳 888 60 15 May 2025 478th Protothor 888 60 8 Jul 2025 478th SebassNoob 888 60 5 Aug 2025 478th Yax42 🇫🇷 888 60 5 Sep 2025 504th Steffan153 🇫🇮 888 80 11 Dec 2023 505th MeWhenI 🇻🇦 888 109 9 Feb 2023 505th CaedenHarper 🇨🇦 888 109 28 Jan 2025 507th P-Quentin 🇫🇷 887 63 3 Aug 2022 507th kaptsanovb 887 63 20 Apr 2023 507th fkantelberg 887 63 14 Jul 2023 507th snoozingnewt 🇺🇸 887 63 10 Sep 2023 507th VictorStenvers 🇳🇱 887 63 13 Nov 2023 507th 1231234md5 🇨🇳 887 63 14 Dec 2023 507th f-tucker 887 63 6 Feb 2024 507th JunkIce 887 63 24 Nov 2024 507th Kowalskiexe 🇵🇱 887 63 19 Apr 2025 507th 123mjb 887 63 2 Jun 2025 517th lynn 886 65 5 May 2022 517th GrayJoKing 🇦🇺 886 65 5 May 2022 517th Sakisan 🇧🇪 886 65 6 May 2022 517th JayXon 🇺🇸 886 65 17 Oct 2022 517th Steffan153 🇫🇮 886 65 12 Nov 2022 517th tobeannouncd 886 65 25 Apr 2025 517th sean-niemann 🇺🇸 886 65 9 Jun 2025 524th stefangimmillaro 886 71 2 Oct 2022 524th Steffan153 🇫🇮 886 71 23 Feb 2023 First Prev 451–525 of 3,353 Next Last
