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 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 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 522nd InigoK 🇺🇸 603 107 17ms 22 Sep 2025 527th roguh 🇬🇹 600 117 2ms 13 Oct 2024 527th iczelia 🇩🇪 600 117 3ms 25 Sep 2025 529th neihousaigaai 598 108 17ms 4 Oct 2024 529th StefanHabel 🇨🇦 598 108 24ms 23 Jan 2025 529th CaedenHarper 🇨🇦 598 108 17ms 22 Jul 2025 532nd dokutan 598 117 2ms 3 Oct 2024 533rd MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 534th arcpolaris 593 120 358ms 28 Jan 2025 535th SirBogman 🇺🇸 591 64 133ms 11 Jul 2025 536th bac0id 590 119 2ms 10 Jan 2025 537th cros107 🇦🇺 587 110 17ms 1 Jan 2025 537th guilhem-roy 🇫🇷 587 110 18ms 29 May 2025 539th DialFrost 🇸🇬 586 67 9ms 25 Jan 2025 540th JunkIce 585 98 398ms 3 Dec 2024 540th commandblockguy 🇺🇸 585 98 669ms 1 Sep 2025 542nd gigaprofisi 🇺🇸 585 110 10ms 11 Aug 2025 543rd h3ra993huskp 🇯🇵 584 159 336ms 25 Nov 2024 543rd Schmitt-Very-Cool 584 159 370ms 26 Sep 2025 545th dokutan 584 174 5ms 21 Feb 2025 546th mousetail 🇳🇱 582 111 22ms 6 Oct 2024 547th Trip-kun 582 136 2ms 5 Oct 2024 548th Mabeloid 🇳🇴 580 121 2ms 13 days ago 549th michelebastione 🇮🇹 579 123 402ms 26 Aug 2025 550th MeWhenI 🇻🇦 578 111 79ms 2 Oct 2024 551st dokutan 576 102 924ms 30 Aug 2025 552nd OllieBoyne 🇬🇧 576 112 23ms 17 Oct 2024 552nd WillConker 576 112 11ms 22 Oct 2024 552nd maxgodfrey2004 🇨🇦 576 112 14ms 4 Jan 2025 555th MeWhenI 🇻🇦 576 331 18ms 2 Oct 2024 556th albanian-laundromat 574 77 2ms 30 hours ago 557th KatieLG 🇬🇧 574 99 1,081ms 1 Oct 2024 558th CaedenHarper 🇨🇦 574 100 574ms 22 Jul 2025 559th 823126 574 112 10ms 13 Nov 2024 559th snoozingnewt 🇺🇸 574 112 10ms 32 hours ago 561st MeWhenI 🇻🇦 568 164 195ms 6 Oct 2024 562nd blaztoma 🇱🇹 566 114 18ms 25 Sep 2025 562nd solisolu 566 114 18ms 18 days ago 564th jipsong 🇩🇪 561 115 17ms 12 May 2025 565th aliakseikalosha 561 127 354ms 10 Oct 2024 566th CaedenHarper 🇨🇦 559 105 1,024ms 27 Sep 2025 567th rowechenzhong 557 116 13ms 17 Oct 2024 568th albanian-laundromat 556 343 51ms 18 days ago 569th madex 🇩🇪 555 116 10ms 1 Oct 2024 570th MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 571st JDiLenarda 🇫🇷 553 165 1,282ms 1 Oct 2024 572nd dtbao20 🇻🇳 552 117 18ms 1 Oct 2024 572nd Pyroan 552 117 17ms 22 Feb 2025 572nd vgamula 🇺🇦 552 117 22ms 5 Aug 2025 575th edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 576th msbranicky 550 185 4ms 20 Jan 2025 577th mousetail 🇳🇱 548 128 2ms 3 Oct 2024 578th gpikmddk 548 130 339ms 4 days ago 579th elgan65536 547 118 11ms 2 Oct 2024 579th logvp 547 118 19ms 6 Oct 2024 579th ahmetdemirag 🇨🇾 547 118 10ms 6 Feb 2025 579th dirckvdende 547 118 21ms 10 Jul 2025 583rd emgordon154 546 52 3ms 3 Nov 2024 584th zakariamouhid 545 118 10ms 1 Oct 2024 585th najs91 544 131 382ms 15 Oct 2024 585th bac0id 544 131 375ms 9 Jan 2025 585th CaedenHarper 🇨🇦 544 131 377ms 18 days ago 588th xyangst 544 171 164ms 1 Oct 2024 589th jtaxen 542 119 18ms 21 Oct 2024 589th psbpsbp 542 119 14ms 19 Dec 2024 589th klixel 🇨🇦 542 119 11ms 9 Apr 2025 592nd eranws 541 119 9ms 23 Dec 2024 593rd TaserTheFox 🇺🇸 538 120 19ms 8 Oct 2024 593rd yokasuretsu 538 120 11ms 26 Jan 2025 593rd Troon 538 120 9ms 17 Feb 2025 596th Sciman101 538 147 2ms 26 Mar 2025 597th BREMAUCY 🇫🇷 534 121 20ms 18 Jul 2025 598th deancureton 532 121 12ms 30 Dec 2024 599th msbranicky 532 175 152ms 13 Dec 2024 600th chartung17 529 122 10ms 24 Mar 2025 First Prev 526–600 of 806 Next Last