Card Number Validation in all languages in bytes. 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 Bytes Time Submitted 600th dokutan 574 112 10ms 22 Jun 2025 600th snoozingnewt 🇺🇸 574 112 10ms 23 hours ago 603rd scpchicken 🇵🇼 573 139 20ms 6 Oct 2024 604th NanduBC 569 140 10ms 1 Oct 2024 604th jmerle 🇳🇱 569 140 11ms 10 Jan 2025 604th RobertHoeh 569 140 10ms 3 Mar 2025 604th smilesformiles3 569 140 23ms 12 Jun 2025 604th artem-aramma 569 140 17ms 18 Jun 2025 609th MeWhenI 🇻🇦 568 164 195ms 6 Oct 2024 610th snoozingnewt 🇺🇸 565 117 496ms 28 hours ago 611th FranklinJiaChen 565 141 10ms 2 Oct 2024 612th KatieLG 🇬🇧 562 85 36ms 12 Jan 2025 613th aliakseikalosha 561 127 354ms 10 Oct 2024 614th brimstonetrader 561 142 11ms 17 Oct 2024 614th codewrite 🇬🇧 561 142 10ms 5 May 2025 614th RobGLambert 561 142 19ms 8 Jun 2025 617th CaedenHarper 🇨🇦 559 105 1,430ms 27 Sep 2025 618th GeneralFabian 557 143 13ms 9 Dec 2024 618th CutSandstone 557 143 11ms 30 Jan 2025 618th kistlerf 🇨🇭 557 143 16ms 19 May 2025 621st albanian-laundromat 556 343 51ms 17 days ago 622nd madex 🇩🇪 555 116 10ms 1 Oct 2024 623rd MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 624th hiichbindermax 553 144 18ms 2 Oct 2024 624th mathisfun271 553 144 10ms 14 Oct 2024 624th bob-th 553 144 12ms 22 Oct 2024 627th JDiLenarda 🇫🇷 553 165 1,282ms 1 Oct 2024 628th KatieLG 🇬🇧 551 120 585ms 1 Oct 2024 629th edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 630th msbranicky 550 185 4ms 20 Jan 2025 631st JunkIce 549 145 11ms 3 Dec 2024 631st Flekay 🇩🇪 549 145 11ms 10 Jul 2025 633rd mousetail 🇳🇱 548 128 2ms 3 Oct 2024 634th gpikmddk 548 130 339ms 4 days ago 635th emgordon154 546 52 3ms 3 Nov 2024 636th zakariamouhid 545 118 10ms 1 Oct 2024 637th croc54 545 146 11ms 15 Dec 2024 638th najs91 544 131 382ms 15 Oct 2024 638th bac0id 544 131 375ms 9 Jan 2025 638th CaedenHarper 🇨🇦 544 131 377ms 17 days ago 641st xyangst 544 171 164ms 1 Oct 2024 642nd dokutan 542 122 459ms 19 Oct 2024 643rd PyryL 🇫🇮 542 147 11ms 1 Mar 2025 644th eranws 541 119 9ms 23 Dec 2024 645th Sciman101 538 147 2ms 26 Mar 2025 646th mbittner20 538 148 10ms 13 Oct 2024 647th psaban 534 149 17ms 31 Jul 2025 648th deancureton 532 121 12ms 30 Dec 2024 649th msbranicky 532 175 152ms 13 Dec 2024 650th FlorianCassayre 🇫🇷 531 150 17ms 1 Oct 2024 650th jameswmccarty 531 150 10ms 5 Oct 2024 650th yousefalizadeh 531 150 13ms 23 Oct 2024 650th feherd 531 150 11ms 31 Oct 2024 650th TheZwierzLF 🇵🇱 531 150 11ms 17 May 2025 655th msbranicky 527 126 3,599ms 9 Jan 2025 656th adamnielson42 🇺🇸 524 152 10ms 6 Oct 2024 656th voidgloom 524 152 10ms 22 Oct 2024 656th omero-san 524 152 10ms 22 Sep 2025 656th brochmann 🇸🇪 524 152 12ms 22 days ago 660th galloj 🇨🇿 522 112 27ms 4 Oct 2024 661st Macweese 522 178 342ms 3 Aug 2025 662nd xyangst 520 153 10ms 1 Oct 2024 662nd denisfouchard 520 153 11ms 21 Aug 2025 664th snoozingnewt 🇺🇸 519 213 119ms 23 hours ago 665th osNiko 🇧🇷 517 154 16ms 21 Aug 2025 666th bac0id 516 180 567ms 9 Jan 2025 667th sidok 515 109 276ms 13 Nov 2024 668th FortuiteMan 🇫🇷 514 155 19ms 16 Oct 2024 668th mossiegoat 514 155 10ms 21 Aug 2025 668th celiendonze 🇨🇭 514 155 19ms 17 days ago 671st dokutan 512 143 152ms 19 Oct 2024 672nd nephila-nacrea 🇬🇧 510 77 4ms 2 Oct 2024 673rd travisdoesmath 510 156 10ms 7 Sep 2025 673rd Shotokhan 510 156 11ms 21 Sep 2025 675th KatieLG 🇬🇧 509 140 380ms 1 Oct 2024 First Prev 601–675 of 808 Next Last