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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 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 Chars Time Submitted 600th zbreit 🇺🇸 604 107 18ms 29 Oct 2024 600th StardustGogeta 604 107 17ms 30 Oct 2024 600th ZakkkkAttackkkk 🇵🇭 604 107 19ms 8 Feb 2025 600th InigoK 🇺🇸 604 107 19ms 22 Sep 2025 600th Lv0Sys 🇵🇱 604 107 19ms 22 Feb 2026 606th dokutan 600 116 2ms 19 Nov 2025 607th neihousaigaai 599 108 19ms 4 Oct 2024 607th StefanHabel 🇨🇦 599 108 20ms 23 Jan 2025 607th CaedenHarper 🇨🇦 599 108 18ms 22 Jul 2025 610th MeWhenI 🇻🇦 597 98 8ms 1 Oct 2024 611th tomh1012 597 108 11ms 12 Mar 2026 612th MeWhenI 🇻🇦 596 73 2ms 2 Oct 2024 613th arcpolaris 596 120 433ms 28 Jan 2025 614th SirBogman 🇺🇸 595 64 160ms 11 Jul 2025 615th DialFrost 🇸🇬 589 67 8ms 25 Jan 2025 616th roguh 🇬🇹 589 117 1ms 13 Oct 2024 616th iczelia 🇩🇪 589 117 2ms 25 Sep 2025 618th dokutan 588 98 816ms 14 Mar 2026 619th cros107 🇦🇺 588 110 18ms 1 Jan 2025 619th guilhem-roy 🇫🇷 588 110 19ms 29 May 2025 621st JunkIce 587 98 459ms 3 Dec 2024 621st commandz0 🇺🇸 587 98 508ms 1 Sep 2025 623rd Schmitt-Very-Cool 587 159 521ms 26 Sep 2025 624th dokutan 587 174 5ms 21 Feb 2025 625th gigaprofisi 🇺🇸 586 110 11ms 11 Aug 2025 625th denkyuu1 586 110 11ms 21 days ago 625th RealBen9 🇬🇧 586 110 10ms 9 days ago 628th amazingalek 🇳🇴 586 122 501ms 1 Jan 2026 629th mousetail 🇳🇱 583 111 20ms 6 Oct 2024 630th Matter1024 🇮🇳 583 140 462ms 14 days ago 631st michelebastione 🇮🇹 582 123 483ms 26 Aug 2025 631st matanberstadt 582 123 442ms 13 days ago 633rd CaedenHarper 🇨🇦 581 99 484ms 8 Mar 2026 634th emgordon154 579 49 3ms 9 Dec 2025 635th bac0id 579 119 2ms 10 Jan 2025 636th MeWhenI 🇻🇦 578 111 92ms 2 Oct 2024 637th OllieBoyne 🇬🇧 577 112 19ms 17 Oct 2024 637th WillConker 577 112 11ms 22 Oct 2024 637th maxgodfrey2004 🇨🇦 577 112 10ms 4 Jan 2025 640th 823126 576 112 10ms 13 Nov 2024 640th snoozingnewt 🇨🇦 576 112 11ms 2 Nov 2025 642nd MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 643rd KatieLG 🇬🇧 574 99 1,400ms 1 Oct 2024 644th MeWhenI 🇻🇦 572 164 196ms 6 Oct 2024 645th Mabeloid 🇳🇴 570 121 1ms 21 Oct 2025 646th janAkali 🇷🇺 569 147 395ms 10 Mar 2026 647th denkyuu1 563 100 354ms 6 days ago 648th aliakseikalosha 563 127 488ms 10 Oct 2024 649th jipsong 🇩🇪 562 115 18ms 12 May 2025 650th jgbaldwinbrown 561 123 2ms 14 Jan 2026 651st dokutan 561 155 446ms 10 Feb 2026 652nd ravnskjaer 🇩🇰 559 167 474ms 15 Dec 2025 653rd rowechenzhong 557 116 17ms 17 Oct 2024 654th madex 🇩🇪 556 116 16ms 1 Oct 2024 655th CaedenHarper 🇨🇦 555 104 747ms 24 Nov 2025 656th FortuiteMan 🇫🇷 554 270 44ms 22 Nov 2025 657th MeWhenI 🇻🇦 554 290 8ms 2 Oct 2024 658th dtbao20 🇻🇳 553 117 19ms 1 Oct 2024 658th Pyroan 553 117 18ms 22 Feb 2025 658th vgamula 🇺🇦 553 117 17ms 5 Aug 2025 658th FortuiteMan 🇫🇷 553 117 18ms 1 Dec 2025 658th yujqiao 553 117 25ms 16 Dec 2025 663rd snoozingnewt 🇨🇦 552 148 132ms 20 Nov 2025 664th msbranicky 552 185 4ms 20 Jan 2025 665th edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 666th gpikmddk 550 130 599ms 30 Oct 2025 667th ethanlally 549 170 439ms 19 Nov 2025 667th snoozingnewt 🇨🇦 549 170 488ms 5 Dec 2025 669th KatieLG 🇬🇧 548 105 635ms 11 Feb 2026 670th elgan65536 🇺🇸 548 118 11ms 2 Oct 2024 670th logvp 548 118 18ms 6 Oct 2024 670th ahmetdemirag 🇨🇾 548 118 10ms 6 Feb 2025 670th dirckvdende 548 118 17ms 10 Jul 2025 674th xyangst 548 171 179ms 1 Oct 2024 675th zakariamouhid 546 118 12ms 1 Oct 2024 676th najs91 546 131 401ms 15 Oct 2024 676th bac0id 546 131 444ms 9 Jan 2025 676th CaedenHarper 🇨🇦 546 131 409ms 17 Oct 2025 679th kmathis22 546 171 509ms 19 Nov 2025 680th JDiLenarda 🇫🇷 544 165 1,630ms 1 Oct 2024 681st jtaxen 543 119 18ms 21 Oct 2024 681st psbpsbp 543 119 9ms 19 Dec 2024 681st klixel 🇨🇦 543 119 10ms 9 Apr 2025 681st vhoulbreque 🇫🇷 543 119 16ms 21 Nov 2025 685th eranws 542 119 11ms 23 Dec 2024 686th TaserTheFox 🇺🇸 539 120 18ms 8 Oct 2024 686th yokasuretsu 539 120 11ms 26 Jan 2025 686th Troon 539 120 10ms 17 Feb 2025 689th mousetail 🇳🇱 539 128 2ms 3 Oct 2024 690th Sciman101 539 147 2ms 26 Mar 2025 691st msbranicky 536 175 161ms 13 Dec 2024 692nd BREMAUCY 🇫🇷 534 121 17ms 18 Jul 2025 692nd retrohun 534 121 10ms 21 Mar 2026 694th JRaspass 🇬🇧 533 74 3ms 24 Mar 2026 695th deancureton 533 121 11ms 30 Dec 2024 696th chartung17 530 122 10ms 24 Mar 2025 697th msbranicky 530 126 2,384ms 9 Jan 2025 698th Protothor 529 122 10ms 10 Mar 2026 699th msbranicky 526 123 17ms 3 Oct 2024 699th bobbysq 526 123 12ms 5 Oct 2024 First Prev 601–700 of 939 Next Last