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Card Number Validation in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous 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 Continued Fractions Crossword 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 Taxicab 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 Erlang 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 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 Erlang 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 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 Continued Fractions Crossword 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 Taxicab Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 601st gigaprofisi 🇺🇸 585 110 9ms 11 Aug 2025 602nd dokutan 584 174 5ms 21 Feb 2025 603rd Trip-kun 583 136 2ms 5 Oct 2024 604th olleicua 🇺🇸 582 82 33ms 18 Oct 2024 605th Mabeloid 🇳🇴 581 121 2ms 21 Oct 2025 606th kurkale6ka 581 137 21ms 16 Oct 2024 606th 4ndyJ 🇬🇧 581 137 10ms 14 Nov 2024 606th Mikey-Beep 🇬🇧 581 137 16ms 6 Aug 2025 606th wobblybits 581 137 17ms 17 Aug 2025 610th michelebastione 🇮🇹 579 123 375ms 26 Aug 2025 611th MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 612th albanian-laundromat 574 77 2ms 25 days ago 613th KatieLG 🇬🇧 574 99 1,081ms 1 Oct 2024 614th 823126 574 112 8ms 13 Nov 2024 614th dokutan 574 112 8ms 22 Jun 2025 614th snoozingnewt 🇺🇸 574 112 8ms 25 days ago 617th scpchicken 🇵🇼 573 139 16ms 6 Oct 2024 618th NanduBC 569 140 10ms 1 Oct 2024 618th jmerle 🇳🇱 569 140 10ms 10 Jan 2025 618th RobertHoeh 569 140 9ms 3 Mar 2025 618th smilesformiles3 569 140 15ms 12 Jun 2025 618th artem-aramma 569 140 16ms 18 Jun 2025 618th Andrey2001 569 140 17ms 19 hours ago 624th MeWhenI 🇻🇦 569 164 209ms 6 Oct 2024 625th CaedenHarper 🇨🇦 565 104 731ms 4 days ago 626th FranklinJiaChen 565 141 10ms 2 Oct 2024 627th KatieLG 🇬🇧 562 85 36ms 12 Jan 2025 628th aliakseikalosha 561 127 401ms 10 Oct 2024 629th brimstonetrader 561 142 10ms 17 Oct 2024 629th codewrite 🇬🇧 561 142 13ms 5 May 2025 629th RobGLambert 561 142 16ms 8 Jun 2025 629th GodlyProgrammer1 561 142 17ms 5 days ago 633rd FortuiteMan 🇫🇷 559 272 37ms 5 days ago 634th GeneralFabian 557 143 9ms 9 Dec 2024 634th CutSandstone 557 143 9ms 30 Jan 2025 634th kistlerf 🇨🇭 557 143 16ms 19 May 2025 637th madex 🇩🇪 555 116 8ms 1 Oct 2024 638th MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 639th hiichbindermax 553 144 15ms 2 Oct 2024 639th mathisfun271 553 144 9ms 14 Oct 2024 639th bob-th 553 144 10ms 22 Oct 2024 642nd JDiLenarda 🇫🇷 553 165 1,278ms 1 Oct 2024 643rd KatieLG 🇬🇧 552 120 585ms 1 Oct 2024 644th snoozingnewt 🇺🇸 552 148 114ms 7 days ago 645th edsrzf 🇳🇿 551 135 4ms 27 Feb 2025 646th msbranicky 550 185 4ms 20 Jan 2025 647th mousetail 🇳🇱 549 128 2ms 3 Oct 2024 648th JunkIce 549 145 10ms 3 Dec 2024 648th Flekay 🇩🇪 549 145 10ms 10 Jul 2025 650th ethanlally 549 170 330ms 9 days ago 651st gpikmddk 548 130 367ms 30 Oct 2025 652nd emgordon154 546 52 2ms 3 Nov 2024 653rd croc54 546 146 11ms 15 Dec 2024 654th zakariamouhid 545 118 9ms 1 Oct 2024 655th xyangst 545 171 171ms 1 Oct 2024 655th kmathis22 545 171 344ms 8 days ago 657th najs91 544 131 343ms 15 Oct 2024 657th bac0id 544 131 370ms 9 Jan 2025 657th CaedenHarper 🇨🇦 544 131 340ms 17 Oct 2025 660th dokutan 543 122 459ms 19 Oct 2024 661st PyryL 🇫🇮 542 147 10ms 1 Mar 2025 662nd eranws 541 119 9ms 23 Dec 2024 663rd Sciman101 539 147 2ms 26 Mar 2025 664th mbittner20 538 148 9ms 13 Oct 2024 665th psaban 535 149 16ms 31 Jul 2025 665th TheZwierzLF 🇵🇱 535 149 9ms 3 days ago 667th msbranicky 533 175 162ms 13 Dec 2024 668th deancureton 532 121 9ms 30 Dec 2024 669th FlorianCassayre 🇫🇷 531 150 17ms 1 Oct 2024 669th jameswmccarty 531 150 9ms 5 Oct 2024 669th yousefalizadeh 531 150 10ms 23 Oct 2024 669th feherd 531 150 12ms 31 Oct 2024 669th kadamkaustubh 531 150 9ms 20 days ago 674th msbranicky 527 126 2,869ms 9 Jan 2025 675th adamnielson42 🇺🇸 524 152 9ms 6 Oct 2024 First Prev 601–675 of 831 Next Last