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Card Number Validation in all languages in chars. 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 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 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 Apéry’s Constant Binary Lambda Calculus 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 Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers 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 ArkScript 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 ArkScript 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 Calendar 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 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 Apéry’s Constant Binary Lambda Calculus 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 Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 559th CaedenHarper 🇨🇦 598 108 16ms 22 Jul 2025 562nd MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 563rd dokutan 596 116 2ms 19 Nov 2025 564th MeWhenI 🇻🇦 595 73 2ms 2 Oct 2024 565th arcpolaris 595 120 396ms 28 Jan 2025 566th SirBogman 🇺🇸 593 64 118ms 11 Jul 2025 567th DialFrost 🇸🇬 587 67 8ms 25 Jan 2025 568th JunkIce 587 98 373ms 3 Dec 2024 568th commandz0 🇺🇸 587 98 483ms 1 Sep 2025 570th cros107 🇦🇺 587 110 16ms 1 Jan 2025 570th guilhem-roy 🇫🇷 587 110 17ms 29 May 2025 570th Lv0Sys 🇵🇱 587 110 17ms 10 Dec 2025 573rd roguh 🇬🇹 587 117 1ms 13 Oct 2024 573rd iczelia 🇩🇪 587 117 2ms 25 Sep 2025 575th Schmitt-Very-Cool 587 159 445ms 26 Sep 2025 576th gigaprofisi 🇺🇸 585 110 9ms 11 Aug 2025 577th amazingalek 🇳🇴 585 122 458ms 1 Jan 2026 578th dokutan 584 174 5ms 21 Feb 2025 579th mousetail 🇳🇱 582 111 16ms 6 Oct 2024 580th michelebastione 🇮🇹 580 123 418ms 26 Aug 2025 581st emgordon154 579 49 3ms 9 Dec 2025 582nd dokutan 578 102 1,094ms 30 Aug 2025 583rd MeWhenI 🇻🇦 578 111 88ms 2 Oct 2024 584th OllieBoyne 🇬🇧 577 112 16ms 17 Oct 2024 584th WillConker 577 112 10ms 22 Oct 2024 584th maxgodfrey2004 🇨🇦 577 112 10ms 4 Jan 2025 587th bac0id 577 119 2ms 10 Jan 2025 588th MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 589th CaedenHarper 🇨🇦 575 100 412ms 22 Jul 2025 590th 823126 575 112 9ms 13 Nov 2024 590th snoozingnewt 🇨🇦 575 112 9ms 2 Nov 2025 592nd KatieLG 🇬🇧 574 99 1,368ms 1 Oct 2024 593rd MeWhenI 🇻🇦 569 164 194ms 6 Oct 2024 594th Mabeloid 🇳🇴 568 121 1ms 21 Oct 2025 595th CaedenHarper 🇨🇦 567 104 1,209ms 24 Nov 2025 596th albanian-laundromat 564 77 2ms 3 Nov 2025 597th jipsong 🇩🇪 562 115 17ms 12 May 2025 598th aliakseikalosha 562 127 487ms 10 Oct 2024 599th jgbaldwinbrown 559 123 2ms 16 days ago 600th ravnskjaer 🇩🇰 559 167 455ms 15 Dec 2025 601st rowechenzhong 557 116 9ms 17 Oct 2024 602nd madex 🇩🇪 555 116 10ms 1 Oct 2024 603rd FortuiteMan 🇫🇷 554 270 36ms 22 Nov 2025 604th MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 605th JDiLenarda 🇫🇷 553 165 1,573ms 1 Oct 2024 606th dtbao20 🇻🇳 552 117 16ms 1 Oct 2024 606th Pyroan 552 117 16ms 22 Feb 2025 606th vgamula 🇺🇦 552 117 19ms 5 Aug 2025 606th FortuiteMan 🇫🇷 552 117 20ms 1 Dec 2025 606th yujqiao 552 117 16ms 16 Dec 2025 611th snoozingnewt 🇨🇦 552 148 121ms 20 Nov 2025 612th edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 613th msbranicky 550 185 4ms 20 Jan 2025 614th gpikmddk 549 130 464ms 30 Oct 2025 615th ethanlally 549 170 377ms 19 Nov 2025 615th snoozingnewt 🇨🇦 549 170 485ms 5 Dec 2025 617th elgan65536 547 118 10ms 2 Oct 2024 617th logvp 547 118 15ms 6 Oct 2024 617th ahmetdemirag 🇨🇾 547 118 9ms 6 Feb 2025 617th dirckvdende 547 118 19ms 10 Jul 2025 621st kmathis22 546 171 350ms 19 Nov 2025 622nd zakariamouhid 545 118 9ms 1 Oct 2024 622nd JOrE20 🇺🇸 545 118 9ms 1 Dec 2025 624th najs91 545 131 444ms 15 Oct 2024 624th bac0id 545 131 486ms 9 Jan 2025 624th CaedenHarper 🇨🇦 545 131 407ms 17 Oct 2025 627th xyangst 545 171 176ms 1 Oct 2024 628th jtaxen 543 119 15ms 21 Oct 2024 628th psbpsbp 543 119 9ms 19 Dec 2024 628th klixel 🇨🇦 543 119 9ms 9 Apr 2025 628th vhoulbreque 🇫🇷 543 119 9ms 21 Nov 2025 632nd eranws 541 119 10ms 23 Dec 2024 633rd TaserTheFox 🇺🇸 538 120 16ms 8 Oct 2024 633rd yokasuretsu 538 120 10ms 26 Jan 2025 633rd Troon 538 120 10ms 17 Feb 2025 636th Sciman101 538 147 2ms 26 Mar 2025 637th mousetail 🇳🇱 537 128 2ms 3 Oct 2024 638th BREMAUCY 🇫🇷 534 121 16ms 18 Jul 2025 639th msbranicky 533 175 164ms 13 Dec 2024 640th deancureton 532 121 9ms 30 Dec 2024 First Prev 561–640 of 866 Next Last