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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 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 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 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 Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 601st NanduBC 569 140 10ms 1 Oct 2024 601st jmerle 🇳🇱 569 140 11ms 10 Jan 2025 601st RobertHoeh 569 140 10ms 3 Mar 2025 601st smilesformiles3 569 140 23ms 12 Jun 2025 601st artem-aramma 569 140 17ms 18 Jun 2025 606th MeWhenI 🇻🇦 567 164 212ms 6 Oct 2024 607th FranklinJiaChen 565 141 10ms 2 Oct 2024 608th KatieLG 🇬🇧 561 85 36ms 12 Jan 2025 609th brimstonetrader 561 142 11ms 17 Oct 2024 609th codewrite 🇬🇧 561 142 10ms 5 May 2025 609th RobGLambert 561 142 19ms 8 Jun 2025 612th aliakseikalosha 560 127 354ms 10 Oct 2024 613th CaedenHarper 🇨🇦 559 105 1,430ms 27 Sep 2025 614th GeneralFabian 557 143 13ms 9 Dec 2024 614th CutSandstone 557 143 11ms 30 Jan 2025 614th kistlerf 🇨🇭 557 143 16ms 19 May 2025 617th albanian-laundromat 556 343 51ms 13 days ago 618th madex 🇩🇪 554 116 10ms 1 Oct 2024 619th MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 620th hiichbindermax 553 144 18ms 2 Oct 2024 620th mathisfun271 553 144 10ms 14 Oct 2024 620th bob-th 553 144 12ms 22 Oct 2024 623rd JDiLenarda 🇫🇷 553 165 1,282ms 1 Oct 2024 624th KatieLG 🇬🇧 551 120 585ms 1 Oct 2024 625th edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 626th msbranicky 550 185 4ms 20 Jan 2025 627th JunkIce 549 145 11ms 3 Dec 2024 627th Flekay 🇩🇪 549 145 11ms 10 Jul 2025 629th mousetail 🇳🇱 548 128 2ms 3 Oct 2024 630th gpikmddk 547 130 339ms 9 hours ago 631st emgordon154 546 52 3ms 3 Nov 2024 632nd zakariamouhid 545 118 10ms 1 Oct 2024 633rd croc54 545 146 11ms 15 Dec 2024 634th najs91 543 131 382ms 15 Oct 2024 634th bac0id 543 131 375ms 9 Jan 2025 634th CaedenHarper 🇨🇦 543 131 377ms 13 days ago 637th xyangst 543 171 193ms 1 Oct 2024 638th dokutan 542 122 459ms 19 Oct 2024 639th PyryL 🇫🇮 542 147 11ms 1 Mar 2025 640th eranws 540 119 9ms 23 Dec 2024 641st snoozingnewt 🇺🇸 538 123 801ms 23 days ago 642nd mbittner20 538 148 10ms 13 Oct 2024 643rd Sciman101 537 147 2ms 26 Mar 2025 644th psaban 534 149 17ms 31 Jul 2025 645th deancureton 532 121 12ms 30 Dec 2024 646th FlorianCassayre 🇫🇷 531 150 17ms 1 Oct 2024 646th jameswmccarty 531 150 10ms 5 Oct 2024 646th yousefalizadeh 531 150 13ms 23 Oct 2024 646th feherd 531 150 11ms 31 Oct 2024 646th TheZwierzLF 🇵🇱 531 150 11ms 17 May 2025 651st msbranicky 531 175 189ms 13 Dec 2024 652nd msbranicky 527 126 3,599ms 9 Jan 2025 653rd albanian-laundromat 524 84 3ms 47 hours ago 654th adamnielson42 🇺🇸 524 152 10ms 6 Oct 2024 654th voidgloom 524 152 10ms 22 Oct 2024 654th omero-san 524 152 10ms 22 Sep 2025 654th brochmann 🇸🇪 524 152 12ms 18 days ago 658th galloj 🇨🇿 522 112 27ms 4 Oct 2024 659th Macweese 521 178 342ms 3 Aug 2025 660th xyangst 520 153 10ms 1 Oct 2024 660th denisfouchard 520 153 11ms 21 Aug 2025 662nd osNiko 🇧🇷 517 154 16ms 21 Aug 2025 663rd bac0id 515 180 567ms 9 Jan 2025 664th sidok 514 109 276ms 13 Nov 2024 665th FortuiteMan 🇫🇷 514 155 19ms 16 Oct 2024 665th mossiegoat 514 155 10ms 21 Aug 2025 665th celiendonze 🇨🇭 514 155 19ms 13 days ago 668th nephila-nacrea 🇬🇧 510 77 4ms 2 Oct 2024 669th travisdoesmath 510 156 10ms 7 Sep 2025 669th Shotokhan 510 156 11ms 21 Sep 2025 671st dokutan 509 143 152ms 19 Oct 2024 672nd KatieLG 🇬🇧 509 146 8ms 2 Oct 2024 673rd KatieLG 🇬🇧 508 140 380ms 1 Oct 2024 674th dokutan 507 126 159ms 22 Jun 2025 675th Chinay-Domitrix 🇺🇸 507 131 4,630ms 30 Mar 2025 First Prev 601–675 of 785 Next Last