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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 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 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 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 ><> ALGOL 68 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 ArkScript 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 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 ArkScript 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 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 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 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 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 561st olleicua 🇺🇸 614 78 34ms 18 Oct 2024 562nd evnu 612 147 82ms 12 Oct 2025 563rd davecame 610 106 17ms 1 Oct 2024 563rd starfihs 610 106 10ms 2 Oct 2024 563rd rschwa6308 🇺🇸 610 106 16ms 28 Oct 2024 563rd snydej 610 106 17ms 21 Nov 2024 563rd andrewjc2000 610 106 17ms 17 Jul 2025 563rd travisdoesmath 610 106 17ms 7 Sep 2025 569th Seanharrs 🇦🇺 610 117 471ms 15 Nov 2024 570th not-a-pokemon 609 113 1ms 23 Jul 2025 571st kaascevich 609 134 127ms 9 Jul 2025 572nd daveberlin 608 106 9ms 27 Jun 2025 573rd Shanethegamer 🇺🇸 606 154 147ms 3 Oct 2024 574th alemelis 604 93 467ms 1 Oct 2024 575th commandz0 🇺🇸 604 107 17ms 7 Oct 2024 575th zbreit 🇺🇸 604 107 16ms 29 Oct 2024 575th StardustGogeta 604 107 17ms 30 Oct 2024 575th ZakkkkAttackkkk 🇵🇭 604 107 16ms 8 Feb 2025 575th InigoK 🇺🇸 604 107 17ms 22 Sep 2025 575th Lv0Sys 🇵🇱 604 107 17ms 6 days ago 581st jupj 🇫🇮 604 114 2ms 20 Jul 2025 582nd albanian-laundromat 603 72 2ms 3 days ago 583rd neihousaigaai 598 108 17ms 4 Oct 2024 583rd StefanHabel 🇨🇦 598 108 15ms 23 Jan 2025 583rd CaedenHarper 🇨🇦 598 108 17ms 22 Jul 2025 586th dokutan 598 116 2ms 19 Nov 2025 587th MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 588th MeWhenI 🇻🇦 595 73 2ms 2 Oct 2024 589th arcpolaris 595 120 396ms 28 Jan 2025 590th SirBogman 🇺🇸 593 64 118ms 11 Jul 2025 591st DialFrost 🇸🇬 588 67 8ms 25 Jan 2025 592nd cros107 🇦🇺 588 110 17ms 1 Jan 2025 592nd guilhem-roy 🇫🇷 588 110 17ms 29 May 2025 594th roguh 🇬🇹 588 117 1ms 13 Oct 2024 594th iczelia 🇩🇪 588 117 2ms 25 Sep 2025 596th JunkIce 587 98 416ms 3 Dec 2024 596th commandz0 🇺🇸 587 98 505ms 1 Sep 2025 598th Schmitt-Very-Cool 587 159 445ms 26 Sep 2025 599th dokutan 587 174 5ms 21 Feb 2025 600th gigaprofisi 🇺🇸 585 110 9ms 11 Aug 2025 601st amazingalek 🇳🇴 585 122 458ms 1 Jan 2026 602nd mousetail 🇳🇱 582 111 17ms 6 Oct 2024 603rd michelebastione 🇮🇹 580 123 418ms 26 Aug 2025 604th emgordon154 579 49 3ms 9 Dec 2025 605th MeWhenI 🇻🇦 578 111 88ms 2 Oct 2024 606th bac0id 578 119 2ms 10 Jan 2025 607th OllieBoyne 🇬🇧 577 112 17ms 17 Oct 2024 607th WillConker 577 112 12ms 22 Oct 2024 607th maxgodfrey2004 🇨🇦 577 112 10ms 4 Jan 2025 610th MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 611th CaedenHarper 🇨🇦 575 100 459ms 22 Jul 2025 612th 823126 575 112 9ms 13 Nov 2024 612th snoozingnewt 🇨🇦 575 112 10ms 2 Nov 2025 614th KatieLG 🇬🇧 574 99 1,368ms 1 Oct 2024 615th dokutan 571 101 859ms 7 days ago 616th Mabeloid 🇳🇴 569 121 1ms 21 Oct 2025 617th MeWhenI 🇻🇦 569 164 195ms 6 Oct 2024 618th jipsong 🇩🇪 562 115 16ms 12 May 2025 619th aliakseikalosha 562 127 456ms 10 Oct 2024 620th dokutan 561 155 428ms 18 days ago 621st jgbaldwinbrown 560 123 2ms 14 Jan 2026 622nd ravnskjaer 🇩🇰 559 167 455ms 15 Dec 2025 623rd rowechenzhong 557 116 10ms 17 Oct 2024 624th CaedenHarper 🇨🇦 555 104 1,139ms 24 Nov 2025 625th madex 🇩🇪 555 116 10ms 1 Oct 2024 626th FortuiteMan 🇫🇷 554 270 36ms 22 Nov 2025 627th MeWhenI 🇻🇦 554 290 8ms 2 Oct 2024 628th JDiLenarda 🇫🇷 553 165 1,573ms 1 Oct 2024 629th dtbao20 🇻🇳 552 117 18ms 1 Oct 2024 629th Pyroan 552 117 17ms 22 Feb 2025 629th vgamula 🇺🇦 552 117 16ms 5 Aug 2025 629th FortuiteMan 🇫🇷 552 117 17ms 1 Dec 2025 629th yujqiao 552 117 17ms 16 Dec 2025 634th snoozingnewt 🇨🇦 552 148 129ms 20 Nov 2025 635th msbranicky 552 185 4ms 20 Jan 2025 636th edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 637th gpikmddk 549 130 464ms 30 Oct 2025 638th ethanlally 549 170 377ms 19 Nov 2025 638th snoozingnewt 🇨🇦 549 170 485ms 5 Dec 2025 640th KatieLG 🇬🇧 548 105 439ms 17 days ago First Prev 561–640 of 899 Next Last