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 450th Alex-x90 🇺🇸 888 95 4 Dec 2022 450th Mandrzejy 🇵🇱 888 95 22 Mar 2024 453rd KatieLG 🇬🇧 887 60 4 May 2022 453rd ScottHamper 887 60 5 May 2022 453rd Re-Adventures 🇮🇳 887 60 5 May 2022 453rd 0x24a537r9 887 60 29 Jul 2022 453rd stefangabos 🇷🇴 887 60 19 Aug 2022 453rd eranws 887 60 10 Sep 2022 453rd GeorgeStechman 🇬🇧 887 60 26 Sep 2022 453rd BloodStormKnight 887 60 15 Oct 2022 453rd dzshn 887 60 3 Dec 2022 453rd biocommando 🇫🇮 887 60 20 Dec 2022 453rd Betuaredead 887 60 5 Jan 2023 453rd piano-miles 887 60 16 Jan 2023 453rd Yewzir 🇧🇪 887 60 12 Feb 2023 453rd shellbertt 🇨🇦 887 60 26 Feb 2023 453rd zakariamouhid 887 60 20 May 2023 453rd raphaelimahorn 887 60 23 Aug 2023 453rd jbt 887 60 25 Dec 2023 453rd olleicua 🇺🇸 887 60 15 Feb 2024 453rd HumanoidCPU 887 60 3 May 2024 453rd dokutan 887 60 13 Aug 2024 453rd LostSyntax21 🇬🇧 887 60 10 Sep 2024 453rd xyangst 887 60 28 Sep 2024 453rd a6166231 🇨🇳 887 60 15 May 2025 476th Ripick 887 73 8 May 2023 477th GrayJoKing 🇦🇺 887 91 19 Jan 2023 478th P-Quentin 🇫🇷 886 63 3 Aug 2022 478th kaptsanovb 886 63 20 Apr 2023 478th fkantelberg 886 63 14 Jul 2023 478th snoozingnewt 🇺🇸 886 63 10 Sep 2023 478th VictorStenvers 🇳🇱 886 63 13 Nov 2023 478th 1231234md5 🇨🇳 886 63 14 Dec 2023 478th f-tucker 886 63 6 Feb 2024 478th JunkIce 886 63 24 Nov 2024 478th Kowalskiexe 🇵🇱 886 63 19 Apr 2025 478th 123mjb 886 63 16 days ago 488th Steffan153 🇫🇮 886 80 15 Nov 2022 488th error256 886 80 8 Apr 2025 490th c0d3-4-F00d 🇩🇪 886 132 6 May 2022 490th madeforlosers 886 132 26 Oct 2023 490th Blockyheadman 886 132 1 Nov 2023 490th SpiritAxolotl 🇺🇸 886 132 20 Mar 2024 494th canissimia 🇦🇶 886 204 25 Nov 2023 495th lynn 885 65 5 May 2022 495th GrayJoKing 🇦🇺 885 65 5 May 2022 495th Sakisan 🇧🇪 885 65 6 May 2022 495th JayXon 🇺🇸 885 65 17 Oct 2022 495th Steffan153 🇫🇮 885 65 12 Nov 2022 495th tobeannouncd 885 65 25 Apr 2025 495th sean-niemann 🇺🇸 885 65 10 days ago 502nd Lydxn 🇨🇦 885 72 16 Jul 2023 503rd sean-niemann 🇺🇸 885 73 12 Jul 2024 504th nwellnhof 🇩🇪 885 111 4 May 2022 504th stefangimmillaro 885 111 26 Sep 2023 504th kkoenig 885 111 4 Jan 2024 507th Shanethegamer 🇺🇸 884 61 31 Oct 2022 507th MeWhenI 🇻🇦 884 61 4 Nov 2022 509th dokutan 884 82 1 Jul 2024 510th DialFrost 🇸🇬 884 95 10 Dec 2024 511th canissimia 🇦🇶 884 110 20 Feb 2023 512th Yewzir 🇧🇪 883 150 21 May 2024 513th Steffan153 🇫🇮 882 52 31 Dec 2022 514th stefangimmillaro 882 71 2 Oct 2022 514th Steffan153 🇫🇮 882 71 23 Feb 2023 514th Shanethegamer 🇺🇸 882 71 16 May 2023 514th sean-niemann 🇺🇸 882 71 12 Jul 2024 518th Shanethegamer 🇺🇸 882 72 8 May 2025 519th GrayJoKing 🇦🇺 882 77 13 Sep 2024 520th JayXon 🇺🇸 881 74 14 Nov 2024 521st DialFrost 🇸🇬 881 76 17 Mar 2025 522nd primo-ppcg 🇹🇭 880 52 5 May 2022 522nd dvargas46 🇺🇸 880 52 22 Dec 2022 524th stefangimmillaro 880 53 2 Oct 2022 524th Haksell 🇦🇶 880 53 22 Feb 2023 Prev 451–525 of 3,075 Next