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 641st Shanethegamer 🇺🇸 610 154 148ms 3 Oct 2024 642nd inverseLorentz 🇦🇺 609 131 12ms 7 Oct 2024 642nd sciencejiho 609 131 24ms 11 Feb 2025 642nd Jaydosu 609 131 11ms 11 Apr 2025 642nd Emutis 🇱🇹 609 131 10ms 11 Nov 2025 646th emgordon154 609 156 8ms 13 Dec 2024 647th HumanoidCPU 608 106 11ms 7 Mar 2025 647th daveberlin 608 106 9ms 27 Jun 2025 649th alemelis 606 93 479ms 1 Oct 2024 650th roguh 🇬🇹 605 117 1ms 13 Oct 2024 650th iczelia 🇩🇪 605 117 2ms 25 Sep 2025 652nd albanian-laundromat 🇺🇸 604 72 1ms 25 Feb 2026 653rd sultan 604 132 18ms 36 hours ago 654th dokutan 602 116 2ms 19 Nov 2025 655th Mabeloid 🇳🇴 600 133 10ms 2 Oct 2024 656th MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 657th tomh1012 597 108 11ms 12 Mar 2026 658th dokutan 597 159 8ms 19 Oct 2024 659th SirBogman 🇺🇸 596 64 152ms 11 Jul 2025 660th MeWhenI 🇻🇦 596 73 2ms 2 Oct 2024 661st arcpolaris 596 120 445ms 28 Jan 2025 662nd bac0id 595 119 2ms 10 Jan 2025 663rd tatzyr 🇯🇵 592 81 36ms 23 Dec 2024 663rd denkyuu1 592 81 35ms 14 days ago 665th RaBa21 🇭🇺 591 135 17ms 19 Jul 2025 665th Mikey-Beep 🇬🇧 591 135 17ms 4 days ago 667th DialFrost 🇸🇬 590 67 8ms 25 Jan 2025 668th dokutan 589 174 5ms 21 Feb 2025 669th Schmitt-Very-Cool 588 159 445ms 26 Sep 2025 670th sciencedjinn 587 136 10ms 8 Nov 2024 670th mchalunderscore 587 136 20ms 4 Jan 2025 670th Florian-Mt 587 136 17ms 5 Dec 2025 673rd gigaprofisi 🇺🇸 586 110 11ms 11 Aug 2025 673rd denkyuu1 586 110 11ms 11 days ago 675th amazingalek 🇳🇴 586 122 464ms 1 Jan 2026 676th olleicua 🇺🇸 585 82 38ms 18 Oct 2024 677th Mabeloid 🇳🇴 585 121 1ms 21 Oct 2025 678th michelebastione 🇮🇹 582 123 597ms 26 Aug 2025 678th matanberstadt 582 123 462ms 3 days ago 680th kurkale6ka 582 137 29ms 16 Oct 2024 680th 4ndyJ 🇬🇧 582 137 12ms 14 Nov 2024 680th wobblybits 582 137 18ms 17 Aug 2025 680th Andrey2001 582 137 16ms 1 Feb 2026 680th tomh1012 582 137 18ms 4 Mar 2026 680th Aquateraneal 🇺🇸 582 137 18ms 8 Mar 2026 686th MeWhenI 🇻🇦 581 331 15ms 2 Oct 2024 687th emgordon154 580 49 3ms 9 Dec 2025 688th KatieLG 🇬🇧 576 99 1,368ms 1 Oct 2024 689th 823126 576 112 11ms 13 Nov 2024 689th dokutan 576 112 9ms 22 Jun 2025 689th snoozingnewt 🇨🇦 576 112 12ms 2 Nov 2025 689th RealBen9 🇬🇧 576 112 10ms 6 days ago 693rd jgbaldwinbrown 575 123 2ms 14 Jan 2026 694th MeWhenI 🇻🇦 572 164 205ms 6 Oct 2024 695th NanduBC 570 140 11ms 1 Oct 2024 695th jmerle 🇳🇱 570 140 10ms 10 Jan 2025 695th RobertHoeh 570 140 10ms 3 Mar 2025 695th smilesformiles3 570 140 18ms 12 Jun 2025 695th artem-aramma 570 140 16ms 18 Jun 2025 700th janAkali 🇷🇺 569 147 355ms 10 Mar 2026 701st FranklinJiaChen 566 141 13ms 2 Oct 2024 702nd KatieLG 🇬🇧 564 85 35ms 12 Jan 2025 703rd aliakseikalosha 563 127 459ms 10 Oct 2024 704th brimstonetrader 562 142 16ms 17 Oct 2024 704th codewrite 🇬🇧 562 142 12ms 5 May 2025 704th RobGLambert 562 142 19ms 8 Jun 2025 704th GodlyProgrammer1 562 142 18ms 22 Nov 2025 704th jbjd 562 142 11ms 4 Feb 2026 709th dokutan 561 155 435ms 10 Feb 2026 710th ravnskjaer 🇩🇰 560 167 455ms 15 Dec 2025 711th FortuiteMan 🇫🇷 559 272 43ms 22 Nov 2025 712th GeneralFabian 558 143 10ms 9 Dec 2024 712th CutSandstone 558 143 11ms 30 Jan 2025 712th kistlerf 🇨🇭 558 143 17ms 19 May 2025 715th CaedenHarper 🇨🇦 556 104 1,098ms 24 Nov 2025 716th madex 🇩🇪 556 116 11ms 1 Oct 2024 717th edsrzf 🇳🇿 554 135 6ms 27 Feb 2025 718th hiichbindermax 554 144 19ms 2 Oct 2024 718th mathisfun271 554 144 12ms 14 Oct 2024 718th bob-th 554 144 11ms 22 Oct 2024 First Prev 641–720 of 1,003 Next Last