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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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Multitap Input 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 Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Nim Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Multitap Input 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 Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Nim Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 698th smilesformiles3 570 140 18ms 12 Jun 2025 698th artem-aramma 570 140 16ms 18 Jun 2025 703rd janAkali 🇷🇺 569 147 395ms 10 Mar 2026 704th FranklinJiaChen 566 141 13ms 2 Oct 2024 705th KatieLG 🇬🇧 564 85 40ms 12 Jan 2025 706th aliakseikalosha 563 127 488ms 10 Oct 2024 707th brimstonetrader 562 142 16ms 17 Oct 2024 707th codewrite 🇬🇧 562 142 12ms 5 May 2025 707th RobGLambert 562 142 19ms 8 Jun 2025 707th GodlyProgrammer1 562 142 18ms 22 Nov 2025 707th jbjd 562 142 11ms 4 Feb 2026 712th dokutan 561 155 446ms 10 Feb 2026 713th ravnskjaer 🇩🇰 559 167 474ms 15 Dec 2025 714th FortuiteMan 🇫🇷 559 272 44ms 22 Nov 2025 715th GeneralFabian 558 143 10ms 9 Dec 2024 715th CutSandstone 558 143 11ms 30 Jan 2025 715th kistlerf 🇨🇭 558 143 17ms 19 May 2025 718th madex 🇩🇪 556 116 16ms 1 Oct 2024 719th CaedenHarper 🇨🇦 555 104 747ms 24 Nov 2025 720th hiichbindermax 554 144 19ms 2 Oct 2024 720th mathisfun271 554 144 12ms 14 Oct 2024 720th bob-th 554 144 11ms 22 Oct 2024 720th cuvam 🇺🇸 554 144 17ms 5 days ago 724th MeWhenI 🇻🇦 554 290 8ms 2 Oct 2024 725th mousetail 🇳🇱 553 128 2ms 3 Oct 2024 726th denkyuu1 552 102 350ms 16 days ago 727th snoozingnewt 🇨🇦 552 148 132ms 20 Nov 2025 728th msbranicky 552 185 4ms 20 Jan 2025 729th edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 730th gpikmddk 550 130 599ms 30 Oct 2025 731st JunkIce 550 145 10ms 3 Dec 2024 732nd ethanlally 549 170 439ms 19 Nov 2025 732nd snoozingnewt 🇨🇦 549 170 488ms 5 Dec 2025 734th Matter1024 🇮🇳 548 149 437ms 22 Mar 2026 735th xyangst 548 171 179ms 1 Oct 2024 736th zakariamouhid 546 118 12ms 1 Oct 2024 737th najs91 546 131 401ms 15 Oct 2024 737th bac0id 546 131 444ms 9 Jan 2025 737th CaedenHarper 🇨🇦 546 131 409ms 17 Oct 2025 740th croc54 546 146 11ms 15 Dec 2024 741st kmathis22 546 171 509ms 19 Nov 2025 742nd JDiLenarda 🇫🇷 544 165 1,630ms 1 Oct 2024 743rd PyryL 🇫🇮 543 147 11ms 1 Mar 2025 744th eranws 542 119 11ms 23 Dec 2024 745th dokutan 540 131 2ms 10 Feb 2026 746th dokutan 539 107 810ms 12 Mar 2026 747th Sciman101 539 147 2ms 26 Mar 2025 748th mbittner20 539 148 10ms 13 Oct 2024 748th YAJUE114514 539 148 10ms 12 Dec 2025 750th msbranicky 536 175 161ms 13 Dec 2024 751st psaban 535 149 18ms 31 Jul 2025 751st TheZwierzLF 🇵🇱 535 149 11ms 24 Nov 2025 751st RodAlc24 🇪🇸 535 149 18ms 22 Feb 2026 754th JRaspass 🇬🇧 533 74 3ms 24 Mar 2026 755th deancureton 533 121 11ms 30 Dec 2024 756th FlorianCassayre 🇫🇷 532 150 18ms 1 Oct 2024 756th jameswmccarty 532 150 11ms 5 Oct 2024 756th yousefalizadeh 532 150 11ms 23 Oct 2024 756th feherd 532 150 10ms 31 Oct 2024 756th kadamkaustubh 532 150 11ms 8 Nov 2025 761st msbranicky 530 126 2,384ms 9 Jan 2025 762nd Protothor 529 122 10ms 10 Mar 2026 763rd adamnielson42 🇺🇸 525 152 10ms 6 Oct 2024 763rd voidgloom 525 152 11ms 22 Oct 2024 763rd omero-san 525 152 10ms 22 Sep 2025 763rd brochmann 🇸🇪 525 152 10ms 12 Oct 2025 767th Macweese 525 178 436ms 3 Aug 2025 768th isaiah0311 🇺🇸 524 135 2ms 9 Feb 2026 769th galloj 🇨🇿 522 112 22ms 4 Oct 2024 770th TheZwierzLF 🇵🇱 522 127 505ms 12 Dec 2025 771st xyangst 521 153 10ms 1 Oct 2024 771st denisfouchard 521 153 10ms 21 Aug 2025 773rd snoozingnewt 🇨🇦 520 213 138ms 2 Nov 2025 774th bac0id 519 180 392ms 9 Jan 2025 775th osNiko 🇧🇷 518 154 11ms 21 Aug 2025 776th sidok 516 109 235ms 13 Nov 2024 777th robin-scragg 515 155 11ms 21 Aug 2025 777th celiendonze 🇨🇭 515 155 11ms 17 Oct 2025 779th Andrey2001 514 129 549ms 1 Feb 2026 780th dokutan 514 143 210ms 19 Oct 2024 781st nephila-nacrea 🇬🇧 513 77 4ms 2 Oct 2024 782nd KatieLG 🇬🇧 511 140 431ms 1 Oct 2024 783rd travisdoesmath 511 156 11ms 7 Sep 2025 783rd Shotokhan 511 156 10ms 21 Sep 2025 785th yoshykai 510 183 406ms 12 Apr 2025 786th Chinay-Domitrix 🇺🇸 509 131 2,441ms 30 Mar 2025 787th KatieLG 🇬🇧 509 146 9ms 2 Oct 2024 788th dokutan 508 126 141ms 22 Jun 2025 789th lhulinsky 508 157 11ms 21 Oct 2024 790th ellis-rix 505 158 11ms 9 Dec 2024 791st msbranicky 504 138 3ms 3 Oct 2024 792nd snoozingnewt 🇨🇦 504 142 471ms 2 Nov 2025 793rd osNiko 🇧🇷 503 72 57ms 11 Jan 2026 794th jlangvand 502 141 1ms 15 Oct 2024 794th HumanoidCPU 502 141 1ms 7 Mar 2025 796th webmiche 502 159 11ms 3 Nov 2025 797th blaztoma 🇱🇹 500 154 119ms 28 Nov 2025 798th Mabeloid 🇳🇴 499 133 572ms 2 Oct 2024 799th MeWhenI 🇻🇦 499 149 54ms 4 Oct 2024 800th CheeseCake628 🇳🇴 499 160 108ms 5 Nov 2024 First Prev 701–800 of 943 Next Last