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 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 Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator 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 Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator 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 Bytes Time Submitted 638th Emutis 🇱🇹 609 131 10ms 11 Nov 2025 642nd emgordon154 609 156 8ms 13 Dec 2024 643rd HumanoidCPU 608 106 11ms 7 Mar 2025 643rd daveberlin 608 106 9ms 27 Jun 2025 645th alemelis 606 93 479ms 1 Oct 2024 646th roguh 🇬🇹 605 117 1ms 13 Oct 2024 646th iczelia 🇩🇪 605 117 2ms 25 Sep 2025 648th sultan 604 132 18ms 10 hours ago 649th albanian-laundromat 🇺🇸 603 72 1ms 25 Feb 2026 650th dokutan 600 116 2ms 19 Nov 2025 651st Mabeloid 🇳🇴 600 133 10ms 2 Oct 2024 652nd MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 653rd tomh1012 597 108 10ms 12 Mar 2026 654th dokutan 597 159 8ms 19 Oct 2024 655th arcpolaris 596 120 376ms 28 Jan 2025 656th SirBogman 🇺🇸 595 64 152ms 11 Jul 2025 657th MeWhenI 🇻🇦 595 73 2ms 2 Oct 2024 658th bac0id 595 119 2ms 10 Jan 2025 659th tatzyr 🇯🇵 592 81 36ms 23 Dec 2024 659th denkyuu1 592 81 35ms 13 days ago 661st RaBa21 🇭🇺 591 135 17ms 19 Jul 2025 661st Mikey-Beep 🇬🇧 591 135 17ms 3 days ago 663rd DialFrost 🇸🇬 590 67 8ms 25 Jan 2025 664th dokutan 589 174 5ms 21 Feb 2025 665th Schmitt-Very-Cool 588 159 445ms 26 Sep 2025 666th sciencedjinn 587 136 10ms 8 Nov 2024 666th mchalunderscore 587 136 20ms 4 Jan 2025 666th Florian-Mt 587 136 17ms 5 Dec 2025 669th gigaprofisi 🇺🇸 586 110 13ms 11 Aug 2025 669th denkyuu1 586 110 11ms 10 days ago 671st amazingalek 🇳🇴 586 122 468ms 1 Jan 2026 672nd olleicua 🇺🇸 585 82 38ms 18 Oct 2024 673rd Mabeloid 🇳🇴 585 121 1ms 21 Oct 2025 674th michelebastione 🇮🇹 582 123 427ms 26 Aug 2025 674th matanberstadt 582 123 429ms 2 days ago 676th kurkale6ka 582 137 29ms 16 Oct 2024 676th 4ndyJ 🇬🇧 582 137 12ms 14 Nov 2024 676th wobblybits 582 137 18ms 17 Aug 2025 676th Andrey2001 582 137 16ms 1 Feb 2026 676th tomh1012 582 137 18ms 4 Mar 2026 676th Aquateraneal 🇺🇸 582 137 18ms 8 Mar 2026 682nd emgordon154 580 49 3ms 9 Dec 2025 683rd KatieLG 🇬🇧 576 99 1,368ms 1 Oct 2024 684th 823126 576 112 10ms 13 Nov 2024 684th dokutan 576 112 11ms 22 Jun 2025 684th snoozingnewt 🇨🇦 576 112 10ms 2 Nov 2025 684th RealBen9 🇬🇧 576 112 9ms 4 days ago 688th MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 689th jgbaldwinbrown 575 123 2ms 14 Jan 2026 690th MeWhenI 🇻🇦 572 164 205ms 6 Oct 2024 691st NanduBC 570 140 11ms 1 Oct 2024 691st jmerle 🇳🇱 570 140 10ms 10 Jan 2025 691st RobertHoeh 570 140 10ms 3 Mar 2025 691st smilesformiles3 570 140 18ms 12 Jun 2025 691st artem-aramma 570 140 16ms 18 Jun 2025 696th janAkali 🇷🇺 569 147 355ms 10 Mar 2026 697th FranklinJiaChen 566 141 13ms 2 Oct 2024 698th KatieLG 🇬🇧 564 85 35ms 12 Jan 2025 699th aliakseikalosha 563 127 420ms 10 Oct 2024 700th brimstonetrader 562 142 16ms 17 Oct 2024 700th codewrite 🇬🇧 562 142 12ms 5 May 2025 700th RobGLambert 562 142 19ms 8 Jun 2025 700th GodlyProgrammer1 562 142 18ms 22 Nov 2025 700th jbjd 562 142 11ms 4 Feb 2026 705th dokutan 561 155 435ms 10 Feb 2026 706th ravnskjaer 🇩🇰 560 167 455ms 15 Dec 2025 707th FortuiteMan 🇫🇷 559 272 40ms 22 Nov 2025 708th GeneralFabian 558 143 10ms 9 Dec 2024 708th CutSandstone 558 143 11ms 30 Jan 2025 708th kistlerf 🇨🇭 558 143 17ms 19 May 2025 711th CaedenHarper 🇨🇦 556 104 1,098ms 24 Nov 2025 712th madex 🇩🇪 556 116 14ms 1 Oct 2024 713th hiichbindermax 554 144 19ms 2 Oct 2024 713th mathisfun271 554 144 12ms 14 Oct 2024 713th bob-th 554 144 11ms 22 Oct 2024 716th snoozingnewt 🇨🇦 554 148 126ms 20 Nov 2025 717th msbranicky 554 185 4ms 20 Jan 2025 718th MeWhenI 🇻🇦 554 290 8ms 2 Oct 2024 719th denkyuu1 553 102 350ms 4 days ago 720th mousetail 🇳🇱 553 128 2ms 3 Oct 2024 First Prev 641–720 of 961 Next Last