Card Number Validation 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 Minesweeper 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 Binary Lambda Calculus 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 NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi 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 Minesweeper 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 Binary Lambda Calculus 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 NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Chars Time Submitted 526th commandblockguy 🇺🇸 603 107 20ms 7 Oct 2024 526th zbreit 🇺🇸 603 107 20ms 29 Oct 2024 526th StardustGogeta 603 107 16ms 30 Oct 2024 526th ZakkkkAttackkkk 🇵🇭 603 107 18ms 8 Feb 2025 526th InigoK 🇺🇸 603 107 17ms 22 Sep 2025 531st roguh 🇬🇹 600 117 2ms 13 Oct 2024 531st iczelia 🇩🇪 600 117 3ms 25 Sep 2025 533rd neihousaigaai 598 108 17ms 4 Oct 2024 533rd StefanHabel 🇨🇦 598 108 24ms 23 Jan 2025 533rd CaedenHarper 🇨🇦 598 108 17ms 22 Jul 2025 536th dokutan 598 117 2ms 3 Oct 2024 537th MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 538th arcpolaris 593 120 358ms 28 Jan 2025 539th SirBogman 🇺🇸 591 64 133ms 11 Jul 2025 540th bac0id 590 119 2ms 10 Jan 2025 541st cros107 🇦🇺 587 110 17ms 1 Jan 2025 541st guilhem-roy 🇫🇷 587 110 18ms 29 May 2025 541st solisolu 587 110 10ms 14 hours ago 544th DialFrost 🇸🇬 586 67 9ms 25 Jan 2025 545th JunkIce 585 98 398ms 3 Dec 2024 545th commandblockguy 🇺🇸 585 98 669ms 1 Sep 2025 547th gigaprofisi 🇺🇸 585 110 9ms 11 Aug 2025 548th h3ra993huskp 🇯🇵 584 159 295ms 25 Nov 2024 548th Schmitt-Very-Cool 584 159 339ms 26 Sep 2025 550th dokutan 584 174 5ms 21 Feb 2025 551st Trip-kun 583 136 2ms 5 Oct 2024 552nd mousetail 🇳🇱 582 111 22ms 6 Oct 2024 553rd Mabeloid 🇳🇴 580 121 2ms 21 days ago 554th michelebastione 🇮🇹 579 123 402ms 26 Aug 2025 555th MeWhenI 🇻🇦 578 111 79ms 2 Oct 2024 556th dokutan 576 102 754ms 30 Aug 2025 557th OllieBoyne 🇬🇧 576 112 23ms 17 Oct 2024 557th WillConker 576 112 11ms 22 Oct 2024 557th maxgodfrey2004 🇨🇦 576 112 14ms 4 Jan 2025 560th MeWhenI 🇻🇦 576 331 16ms 2 Oct 2024 561st albanian-laundromat 574 77 2ms 9 days ago 562nd KatieLG 🇬🇧 574 99 1,081ms 1 Oct 2024 563rd CaedenHarper 🇨🇦 574 100 574ms 22 Jul 2025 564th 823126 574 112 9ms 13 Nov 2024 564th snoozingnewt 🇺🇸 574 112 9ms 9 days ago 566th MeWhenI 🇻🇦 568 164 209ms 6 Oct 2024 567th blaztoma 🇱🇹 566 114 16ms 25 Sep 2025 568th jipsong 🇩🇪 561 115 17ms 12 May 2025 569th aliakseikalosha 561 127 354ms 10 Oct 2024 570th CaedenHarper 🇨🇦 559 105 733ms 27 Sep 2025 571st rowechenzhong 557 116 13ms 17 Oct 2024 572nd albanian-laundromat 556 343 56ms 26 days ago 573rd madex 🇩🇪 555 116 9ms 1 Oct 2024 574th MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 575th JDiLenarda 🇫🇷 553 165 1,282ms 1 Oct 2024 576th dtbao20 🇻🇳 552 117 18ms 1 Oct 2024 576th Pyroan 552 117 17ms 22 Feb 2025 576th vgamula 🇺🇦 552 117 22ms 5 Aug 2025 579th edsrzf 🇳🇿 551 135 4ms 27 Feb 2025 580th msbranicky 550 185 4ms 20 Jan 2025 581st mousetail 🇳🇱 548 128 2ms 3 Oct 2024 582nd gpikmddk 548 130 339ms 12 days ago 583rd elgan65536 547 118 11ms 2 Oct 2024 583rd logvp 547 118 19ms 6 Oct 2024 583rd ahmetdemirag 🇨🇾 547 118 10ms 6 Feb 2025 583rd dirckvdende 547 118 21ms 10 Jul 2025 587th emgordon154 546 52 3ms 3 Nov 2024 588th zakariamouhid 545 118 10ms 1 Oct 2024 589th najs91 544 131 382ms 15 Oct 2024 589th bac0id 544 131 375ms 9 Jan 2025 589th CaedenHarper 🇨🇦 544 131 377ms 26 days ago 592nd xyangst 544 171 173ms 1 Oct 2024 593rd jtaxen 543 119 18ms 21 Oct 2024 593rd psbpsbp 543 119 14ms 19 Dec 2024 593rd klixel 🇨🇦 543 119 11ms 9 Apr 2025 596th eranws 541 119 9ms 23 Dec 2024 597th Sciman101 539 147 2ms 26 Mar 2025 598th TaserTheFox 🇺🇸 538 120 19ms 8 Oct 2024 598th yokasuretsu 538 120 11ms 26 Jan 2025 598th Troon 538 120 9ms 17 Feb 2025 First Prev 526–600 of 812 Next Last