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 525th zbreit 🇺🇸 603 107 20ms 29 Oct 2024 525th StardustGogeta 603 107 16ms 30 Oct 2024 525th ZakkkkAttackkkk 🇵🇭 603 107 18ms 8 Feb 2025 525th InigoK 🇺🇸 603 107 17ms 22 Sep 2025 530th roguh 🇬🇹 600 117 2ms 13 Oct 2024 530th iczelia 🇩🇪 600 117 3ms 25 Sep 2025 532nd neihousaigaai 598 108 17ms 4 Oct 2024 532nd StefanHabel 🇨🇦 598 108 24ms 23 Jan 2025 532nd CaedenHarper 🇨🇦 598 108 17ms 22 Jul 2025 535th dokutan 598 117 2ms 3 Oct 2024 536th MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 537th arcpolaris 593 120 358ms 28 Jan 2025 538th SirBogman 🇺🇸 591 64 133ms 11 Jul 2025 539th bac0id 590 119 2ms 10 Jan 2025 540th cros107 🇦🇺 587 110 17ms 1 Jan 2025 540th guilhem-roy 🇫🇷 587 110 18ms 29 May 2025 540th solisolu 587 110 10ms 116 mins ago 543rd DialFrost 🇸🇬 586 67 9ms 25 Jan 2025 544th JunkIce 585 98 398ms 3 Dec 2024 544th commandblockguy 🇺🇸 585 98 669ms 1 Sep 2025 546th gigaprofisi 🇺🇸 585 110 9ms 11 Aug 2025 547th h3ra993huskp 🇯🇵 584 159 295ms 25 Nov 2024 547th Schmitt-Very-Cool 584 159 339ms 26 Sep 2025 549th dokutan 584 174 5ms 21 Feb 2025 550th mousetail 🇳🇱 582 111 22ms 6 Oct 2024 551st Trip-kun 582 136 2ms 5 Oct 2024 552nd Mabeloid 🇳🇴 580 121 2ms 21 days ago 553rd michelebastione 🇮🇹 579 123 402ms 26 Aug 2025 554th MeWhenI 🇻🇦 578 111 79ms 2 Oct 2024 555th dokutan 576 102 754ms 30 Aug 2025 556th OllieBoyne 🇬🇧 576 112 23ms 17 Oct 2024 556th WillConker 576 112 11ms 22 Oct 2024 556th maxgodfrey2004 🇨🇦 576 112 14ms 4 Jan 2025 559th MeWhenI 🇻🇦 576 331 16ms 2 Oct 2024 560th albanian-laundromat 574 77 2ms 8 days ago 561st KatieLG 🇬🇧 574 99 1,081ms 1 Oct 2024 562nd CaedenHarper 🇨🇦 574 100 574ms 22 Jul 2025 563rd 823126 574 112 9ms 13 Nov 2024 563rd snoozingnewt 🇺🇸 574 112 9ms 8 days ago 565th MeWhenI 🇻🇦 568 164 195ms 6 Oct 2024 566th blaztoma 🇱🇹 566 114 18ms 25 Sep 2025 567th jipsong 🇩🇪 561 115 17ms 12 May 2025 568th aliakseikalosha 561 127 354ms 10 Oct 2024 569th CaedenHarper 🇨🇦 559 105 733ms 27 Sep 2025 570th rowechenzhong 557 116 13ms 17 Oct 2024 571st albanian-laundromat 556 343 56ms 25 days ago 572nd madex 🇩🇪 555 116 9ms 1 Oct 2024 573rd MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 574th JDiLenarda 🇫🇷 553 165 1,282ms 1 Oct 2024 575th dtbao20 🇻🇳 552 117 18ms 1 Oct 2024 575th Pyroan 552 117 17ms 22 Feb 2025 575th vgamula 🇺🇦 552 117 22ms 5 Aug 2025 578th edsrzf 🇳🇿 551 135 4ms 27 Feb 2025 579th msbranicky 550 185 4ms 20 Jan 2025 580th mousetail 🇳🇱 548 128 2ms 3 Oct 2024 581st gpikmddk 548 130 339ms 12 days ago 582nd elgan65536 547 118 11ms 2 Oct 2024 582nd logvp 547 118 19ms 6 Oct 2024 582nd ahmetdemirag 🇨🇾 547 118 10ms 6 Feb 2025 582nd dirckvdende 547 118 21ms 10 Jul 2025 586th emgordon154 546 52 3ms 3 Nov 2024 587th zakariamouhid 545 118 10ms 1 Oct 2024 588th najs91 544 131 382ms 15 Oct 2024 588th bac0id 544 131 375ms 9 Jan 2025 588th CaedenHarper 🇨🇦 544 131 377ms 25 days ago 591st xyangst 544 171 164ms 1 Oct 2024 592nd jtaxen 543 119 18ms 21 Oct 2024 592nd psbpsbp 543 119 14ms 19 Dec 2024 592nd klixel 🇨🇦 543 119 11ms 9 Apr 2025 595th eranws 541 119 9ms 23 Dec 2024 596th TaserTheFox 🇺🇸 538 120 19ms 8 Oct 2024 596th yokasuretsu 538 120 11ms 26 Jan 2025 596th Troon 538 120 9ms 17 Feb 2025 599th Sciman101 538 147 2ms 26 Mar 2025 600th BREMAUCY 🇫🇷 534 121 20ms 18 Jul 2025 First Prev 526–600 of 810 Next Last