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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 450th snoozingnewt 🇺🇸 693 115 10ms 7 days ago 452nd Salutations45 692 93 9ms 17 Nov 2024 452nd strattonwhisler 692 93 8ms 26 Mar 2025 454th Alex-x90 🇺🇸 692 124 366ms 1 Oct 2024 454th Herbert00709 🇵🇱 692 124 50ms 14 Jun 2025 456th NickTheEASDude 🇺🇸 690 115 3ms 17 Dec 2024 457th pardouin 🇫🇷 688 57 5ms 3 Oct 2024 458th Bmrl7 687 116 10ms 3 Oct 2024 458th rowechenzhong 687 116 10ms 17 Oct 2024 460th MeWhenI 🇻🇦 686 68 223ms 2 Oct 2024 461st error256 685 104 367ms 14 Oct 2024 462nd Lv0Sys 🇵🇱 684 94 9ms 15 Jun 2025 463rd madex 🇩🇪 683 103 2ms 2 Oct 2024 464th aDwarfNamedUrist 682 162 183ms 1 Sep 2025 465th dtbao20 🇻🇳 681 117 17ms 1 Oct 2024 465th Pyroan 681 117 16ms 22 Feb 2025 465th vgamula 🇺🇦 681 117 16ms 5 Aug 2025 468th CatsAreFluffy 680 53 50ms 27 Dec 2024 469th Shanethegamer 🇺🇸 679 65 2ms 1 Oct 2024 470th MeWhenI 🇻🇦 678 108 179ms 2 Oct 2024 471st the-zammers 678 163 140ms 1 Dec 2024 472nd plcc0 676 37 70ms 6 Apr 2025 473rd commandblockguy 🇺🇸 676 98 669ms 1 Sep 2025 474th BlankSpruce 676 104 2ms 1 Oct 2024 475th elgan65536 675 118 10ms 2 Oct 2024 475th logvp 675 118 18ms 6 Oct 2024 475th ahmetdemirag 🇨🇾 675 118 9ms 6 Feb 2025 475th plcc0 675 118 16ms 6 Apr 2025 475th KatieLG 🇬🇧 675 118 17ms 20 Apr 2025 475th dirckvdende 675 118 16ms 10 Jul 2025 481st jerrandolph 672 177 252ms 25 Sep 2025 481st CaedenHarper 🇨🇦 672 177 241ms 10 days ago 483rd edsrzf 🇳🇿 671 99 2,289ms 5 Jul 2025 484th tailorspy 671 128 362ms 4 Oct 2024 485th Herbert00709 🇵🇱 670 105 2ms 14 Jun 2025 485th luuumine 🇫🇷 670 105 2ms 40 hours ago 487th error256 669 101 4ms 24 Oct 2024 488th jtaxen 669 119 16ms 21 Oct 2024 488th psbpsbp 669 119 10ms 19 Dec 2024 488th klixel 🇨🇦 669 119 10ms 9 Apr 2025 488th vhoulbreque 🇫🇷 669 119 10ms 6 days ago 492nd CaedenHarper 🇨🇦 666 140 336ms 3 Oct 2025 493rd emgordon154 665 111 4ms 12 Jan 2025 494th dbut2 🇦🇺 665 179 261ms 31 Oct 2024 495th rniii 664 106 2ms 2 Oct 2024 495th gastropner 664 106 2ms 11 Feb 2025 497th TaserTheFox 🇺🇸 664 120 20ms 8 Oct 2024 497th yokasuretsu 664 120 11ms 26 Jan 2025 497th Troon 664 120 10ms 17 Feb 2025 497th keelimeguy 🇺🇸 664 120 16ms 14 Jun 2025 501st AlephSquirrel 664 146 4ms 14 May 2025 502nd two-bad 🇬🇧 663 97 10ms 2 Oct 2024 502nd LordSir101 663 97 8ms 10 Aug 2025 504th CaedenHarper 🇨🇦 663 100 574ms 22 Jul 2025 505th 4hg 🇺🇸 661 59 34ms 5 Oct 2024 506th snoozingnewt 🇺🇸 661 180 256ms 25 days ago 507th DialFrost 🇸🇬 659 67 2ms 22 Dec 2024 508th BREMAUCY 🇫🇷 658 121 16ms 18 Jul 2025 509th error256 657 142 159ms 31 May 2025 510th xyangst 656 98 10ms 15 Oct 2024 510th BambooleanLogic 🇸🇪 656 98 10ms 21 Oct 2024 512th jwhear 🇺🇸 655 197 1,691ms 1 Oct 2024 513th chartung17 653 122 10ms 24 Mar 2025 514th Babafaba 650 102 406ms 17 days ago 515th w911 650 183 269ms 7 Oct 2024 516th msbranicky 648 123 15ms 3 Oct 2024 516th bobbysq 648 123 9ms 5 Oct 2024 516th wuzekai518 648 123 9ms 8 Oct 2024 519th rucin93 🇵🇱 648 144 151ms 28 Oct 2024 520th MeWhenI 🇻🇦 645 91 756ms 29 Aug 2025 521st koipondx86 645 123 2ms 8 Nov 2024 522nd CaedenHarper 🇨🇦 643 100 9ms 22 Aug 2025 522nd iczelia 🇩🇪 643 100 9ms 11 Oct 2025 522nd Yax42 🇫🇷 643 100 18ms 24 hours ago 525th Apataras 643 145 302ms 25 Jun 2025 First Prev 451–525 of 831 Next Last