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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 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 Chars Time Submitted 521st travisdoesmath 609 106 17ms 7 Sep 2025 527th Seanharrs 609 117 411ms 15 Nov 2024 528th kaascevich 609 134 114ms 9 Jul 2025 529th bac0id 609 141 373ms 10 Jan 2025 530th daveberlin 607 106 9ms 27 Jun 2025 531st Shanethegamer 🇺🇸 606 154 145ms 3 Oct 2024 532nd MeWhenI 🇻🇦 605 73 2ms 2 Oct 2024 533rd albanian-laundromat 605 315 13ms 3 days ago 534th alemelis 604 93 467ms 1 Oct 2024 535th commandblockguy 🇺🇸 603 107 15ms 7 Oct 2024 535th zbreit 🇺🇸 603 107 18ms 29 Oct 2024 535th StardustGogeta 603 107 16ms 30 Oct 2024 535th ZakkkkAttackkkk 🇵🇭 603 107 17ms 8 Feb 2025 535th InigoK 🇺🇸 603 107 15ms 22 Sep 2025 540th roguh 🇬🇹 601 117 2ms 13 Oct 2024 540th iczelia 🇩🇪 601 117 3ms 25 Sep 2025 542nd neihousaigaai 598 108 16ms 4 Oct 2024 542nd StefanHabel 🇨🇦 598 108 16ms 23 Jan 2025 542nd CaedenHarper 🇨🇦 598 108 17ms 22 Jul 2025 545th MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 546th dokutan 596 116 2ms 9 days ago 547th arcpolaris 593 120 347ms 28 Jan 2025 548th SirBogman 🇺🇸 591 64 122ms 11 Jul 2025 549th bac0id 591 119 2ms 10 Jan 2025 550th JunkIce 587 98 398ms 3 Dec 2024 550th commandblockguy 🇺🇸 587 98 669ms 1 Sep 2025 552nd cros107 🇦🇺 587 110 16ms 1 Jan 2025 552nd guilhem-roy 🇫🇷 587 110 16ms 29 May 2025 554th DialFrost 🇸🇬 586 67 9ms 25 Jan 2025 555th h3ra993huskp 🇯🇵 586 159 295ms 25 Nov 2024 555th Schmitt-Very-Cool 586 159 339ms 26 Sep 2025 557th gigaprofisi 🇺🇸 585 110 9ms 11 Aug 2025 558th dokutan 584 174 5ms 21 Feb 2025 559th Trip-kun 583 136 2ms 5 Oct 2024 560th mousetail 🇳🇱 582 111 16ms 6 Oct 2024 561st Mabeloid 🇳🇴 581 121 2ms 21 Oct 2025 562nd michelebastione 🇮🇹 579 123 375ms 26 Aug 2025 563rd MeWhenI 🇻🇦 578 111 79ms 2 Oct 2024 564th OllieBoyne 🇬🇧 577 112 16ms 17 Oct 2024 564th WillConker 577 112 10ms 22 Oct 2024 564th maxgodfrey2004 🇨🇦 577 112 10ms 4 Jan 2025 567th dokutan 576 102 754ms 30 Aug 2025 568th MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 569th CaedenHarper 🇨🇦 575 100 574ms 22 Jul 2025 570th albanian-laundromat 574 77 2ms 25 days ago 571st KatieLG 🇬🇧 574 99 1,081ms 1 Oct 2024 572nd 823126 574 112 8ms 13 Nov 2024 572nd snoozingnewt 🇺🇸 574 112 8ms 25 days ago 574th MeWhenI 🇻🇦 569 164 209ms 6 Oct 2024 575th blaztoma 🇱🇹 566 114 16ms 25 Sep 2025 576th CaedenHarper 🇨🇦 565 104 731ms 4 days ago 577th jipsong 🇩🇪 561 115 16ms 12 May 2025 578th aliakseikalosha 561 127 401ms 10 Oct 2024 579th rowechenzhong 557 116 10ms 17 Oct 2024 580th madex 🇩🇪 555 116 8ms 1 Oct 2024 581st FortuiteMan 🇫🇷 554 270 37ms 6 days ago 582nd MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 583rd JDiLenarda 🇫🇷 553 165 1,278ms 1 Oct 2024 584th dtbao20 🇻🇳 552 117 17ms 1 Oct 2024 584th Pyroan 552 117 16ms 22 Feb 2025 584th vgamula 🇺🇦 552 117 16ms 5 Aug 2025 587th snoozingnewt 🇺🇸 552 148 114ms 8 days ago 588th edsrzf 🇳🇿 551 135 4ms 27 Feb 2025 589th msbranicky 550 185 4ms 20 Jan 2025 590th mousetail 🇳🇱 549 128 2ms 3 Oct 2024 591st ethanlally 549 170 330ms 9 days ago 592nd gpikmddk 548 130 367ms 30 Oct 2025 593rd elgan65536 547 118 10ms 2 Oct 2024 593rd logvp 547 118 18ms 6 Oct 2024 593rd ahmetdemirag 🇨🇾 547 118 9ms 6 Feb 2025 593rd dirckvdende 547 118 16ms 10 Jul 2025 597th emgordon154 546 52 2ms 3 Nov 2024 598th zakariamouhid 545 118 9ms 1 Oct 2024 599th xyangst 545 171 171ms 1 Oct 2024 599th kmathis22 545 171 344ms 9 days ago First Prev 526–600 of 829 Next Last