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 Submitted 451st albanian-laundromat 896 55 973ms 22 Sep 2025 452nd sean-niemann 🇺🇸 896 108 323ms 25 May 2024 452nd GolfingSuccess 🇬🇷 896 108 291ms 6 Sep 2025 454th Lydxn 🇨🇦 895 69 7ms 12 Sep 2022 454th GrayJoKing 🇦🇺 895 69 7ms 12 Sep 2022 454th btnlq 895 69 7ms 24 Sep 2022 457th trinityy-7 894 69 2ms 7 Aug 2025 458th SirBogman 🇺🇸 892 50 414ms 5 May 2022 458th nwellnhof 🇩🇪 892 50 429ms 3 Jun 2022 458th Lydxn 🇨🇦 892 50 415ms 15 Aug 2022 458th Steffan153 🇫🇮 892 50 448ms 9 Aug 2024 462nd MichalMarsalek 🇨🇿 892 87 334ms 5 May 2022 462nd Kloppermand 🇩🇰 892 87 343ms 7 Oct 2022 462nd bwat2 892 87 321ms 6 Apr 2023 465th GrayJoKing 🇦🇺 892 91 31ms 19 Jan 2023 466th Lydxn 🇨🇦 891 72 302ms 16 Jul 2023 467th edsrzf 🇳🇿 891 78 12ms 26 Oct 2024 467th kg583 🇺🇸 891 78 14ms 26 days ago 469th p-zubieta 890 48 6 Mar 2024 470th oeb25 890 93 158ms 16 May 2022 470th snobee 🇨🇦 890 93 139ms 8 Dec 2022 470th logvp 890 93 135ms 2 Jan 2024 470th elgan65536 890 93 154ms 5 Mar 2024 470th smartiel 890 93 131ms 12 Aug 2024 470th trist224 🇫🇷 890 93 148ms 12 Aug 2024 470th nullie 890 93 153ms 19 Dec 2024 470th lolgeny 890 93 140ms 22 Feb 2025 478th Ripick 889 73 143ms 8 May 2023 479th Steffan153 🇫🇮 889 80 40ms 15 Nov 2022 479th Steffan153 🇫🇮 889 80 26ms 11 Dec 2023 479th error256 889 80 130ms 8 Apr 2025 482nd GolfingSuccess 🇬🇷 889 95 65ms 5 May 2022 482nd Alex-x90 🇺🇸 889 95 69ms 4 Dec 2022 482nd Mandrzejy 🇵🇱 889 95 62ms 22 Mar 2024 485th KatieLG 🇬🇧 888 60 11ms 4 May 2022 485th ScottHamper 888 60 10ms 5 May 2022 485th Re-Adventures 🇮🇳 888 60 12ms 5 May 2022 485th 0x24a537r9 888 60 11ms 29 Jul 2022 485th stefangabos 🇷🇴 888 60 10ms 19 Aug 2022 485th eranws 888 60 10ms 10 Sep 2022 485th GeorgeStechman 🇬🇧 888 60 10ms 26 Sep 2022 485th BloodStormKnight 888 60 11ms 15 Oct 2022 485th dzshn 888 60 12ms 3 Dec 2022 485th biocommando 🇫🇮 888 60 9ms 20 Dec 2022 485th Betuaredead 888 60 10ms 5 Jan 2023 485th piano-miles 888 60 11ms 16 Jan 2023 485th Yewzir 🇧🇪 888 60 10ms 12 Feb 2023 485th shellbertt 🇨🇦 888 60 10ms 26 Feb 2023 485th zakariamouhid 888 60 10ms 20 May 2023 485th raphaelimahorn 888 60 10ms 23 Aug 2023 485th jbt 888 60 11ms 25 Dec 2023 485th olleicua 🇺🇸 888 60 11ms 15 Feb 2024 485th HumanoidCPU 888 60 11ms 3 May 2024 485th dokutan 888 60 13ms 13 Aug 2024 485th LostSyntax21 🇬🇧 888 60 10ms 10 Sep 2024 485th xyangst 888 60 10ms 28 Sep 2024 485th a6166231 🇨🇳 888 60 10ms 15 May 2025 485th Protothor 888 60 10ms 8 Jul 2025 485th SebassNoob 888 60 11ms 5 Aug 2025 485th Yax42 🇫🇷 888 60 11ms 5 Sep 2025 485th levinwinter 888 60 11ms 3 hours ago 512th MeWhenI 🇻🇦 888 109 298ms 9 Feb 2023 513th m-tkach 🇺🇦 888 117 27ms 7 May 2022 513th Lydxn 🇨🇦 888 117 28ms 7 May 2022 515th P-Quentin 🇫🇷 887 63 19ms 3 Aug 2022 515th kaptsanovb 887 63 25ms 20 Apr 2023 515th fkantelberg 887 63 21ms 14 Jul 2023 515th snoozingnewt 🇺🇸 887 63 28ms 10 Sep 2023 515th VictorStenvers 🇳🇱 887 63 24ms 13 Nov 2023 515th 1231234md5 🇨🇳 887 63 21ms 14 Dec 2023 515th f-tucker 887 63 35ms 6 Feb 2024 515th JunkIce 887 63 23ms 24 Nov 2024 515th Kowalskiexe 🇵🇱 887 63 20ms 19 Apr 2025 515th 123mjb 887 63 23ms 2 Jun 2025 515th luuumine 🇫🇷 887 63 24ms 11 days ago First Prev 451–525 of 3,385 Next Last