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 Dragon Curve 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 Dragon Curve 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 Europe2048 614 130 11ms 2 Oct 2024 641st nstearns96 🇬🇧 614 130 17ms 2 Oct 2024 641st Stockoh 🇫🇷 614 130 17ms 4 Jul 2025 644th MeWhenI 🇻🇦 612 111 89ms 2 Oct 2024 645th kaascevich 612 134 126ms 9 Jul 2025 646th Seanharrs 🇦🇺 611 117 454ms 15 Nov 2024 647th vang1ong7ang 610 41 45ms 10 hours ago 648th Shanethegamer 🇺🇸 610 154 153ms 3 Oct 2024 649th inverseLorentz 🇦🇺 609 131 12ms 7 Oct 2024 649th sciencejiho 609 131 24ms 11 Feb 2025 649th Jaydosu 609 131 11ms 11 Apr 2025 649th Emutis 🇱🇹 609 131 10ms 11 Nov 2025 653rd emgordon154 609 156 9ms 13 Dec 2024 654th HumanoidCPU 608 106 11ms 7 Mar 2025 654th daveberlin 608 106 11ms 27 Jun 2025 656th albanian-laundromat 🇺🇸 606 72 1ms 25 Feb 2026 657th alemelis 606 93 468ms 1 Oct 2024 658th roguh 🇬🇹 605 117 1ms 13 Oct 2024 658th iczelia 🇩🇪 605 117 2ms 25 Sep 2025 660th sultan 604 132 17ms 10 days ago 661st dokutan 602 116 2ms 19 Nov 2025 662nd Mabeloid 🇳🇴 600 133 10ms 2 Oct 2024 663rd MeWhenI 🇻🇦 597 73 2ms 2 Oct 2024 664th MeWhenI 🇻🇦 597 98 8ms 1 Oct 2024 665th tomh1012 597 108 11ms 12 Mar 2026 666th dokutan 597 159 6ms 19 Oct 2024 667th SirBogman 🇺🇸 596 64 152ms 11 Jul 2025 668th arcpolaris 596 120 433ms 28 Jan 2025 669th bac0id 595 119 2ms 10 Jan 2025 670th tatzyr 🇯🇵 592 81 35ms 23 Dec 2024 671st RaBa21 🇭🇺 591 135 17ms 19 Jul 2025 671st Mikey-Beep 🇬🇧 591 135 17ms 12 days ago 673rd DialFrost 🇸🇬 590 67 8ms 25 Jan 2025 674th dokutan 589 174 5ms 21 Feb 2025 675th Schmitt-Very-Cool 588 159 539ms 26 Sep 2025 676th sciencedjinn 587 136 10ms 8 Nov 2024 676th mchalunderscore 587 136 20ms 4 Jan 2025 676th Florian-Mt 587 136 17ms 5 Dec 2025 679th gigaprofisi 🇺🇸 586 110 11ms 11 Aug 2025 679th denkyuu1 586 110 11ms 19 days ago 679th RealBen9 🇬🇧 586 110 10ms 7 days ago 682nd amazingalek 🇳🇴 586 122 501ms 1 Jan 2026 683rd olleicua 🇺🇸 585 82 37ms 18 Oct 2024 684th Mabeloid 🇳🇴 585 121 1ms 21 Oct 2025 685th michelebastione 🇮🇹 582 123 483ms 26 Aug 2025 685th matanberstadt 582 123 442ms 11 days ago 687th kurkale6ka 582 137 29ms 16 Oct 2024 687th 4ndyJ 🇬🇧 582 137 12ms 14 Nov 2024 687th wobblybits 582 137 18ms 17 Aug 2025 687th Andrey2001 582 137 16ms 1 Feb 2026 687th tomh1012 582 137 18ms 4 Mar 2026 687th Aquateraneal 🇺🇸 582 137 18ms 8 Mar 2026 693rd MeWhenI 🇻🇦 581 331 15ms 2 Oct 2024 694th emgordon154 580 49 3ms 9 Dec 2025 695th KatieLG 🇬🇧 576 99 1,400ms 1 Oct 2024 696th 823126 576 112 10ms 13 Nov 2024 696th dokutan 576 112 10ms 22 Jun 2025 696th snoozingnewt 🇨🇦 576 112 11ms 2 Nov 2025 699th jgbaldwinbrown 576 123 2ms 14 Jan 2026 700th MeWhenI 🇻🇦 572 164 196ms 6 Oct 2024 701st janAkali 🇷🇺 571 147 445ms 10 Mar 2026 702nd NanduBC 570 140 11ms 1 Oct 2024 702nd jmerle 🇳🇱 570 140 10ms 10 Jan 2025 702nd RobertHoeh 570 140 10ms 3 Mar 2025 702nd smilesformiles3 570 140 18ms 12 Jun 2025 702nd artem-aramma 570 140 16ms 18 Jun 2025 707th FranklinJiaChen 566 141 13ms 2 Oct 2024 708th KatieLG 🇬🇧 564 85 40ms 12 Jan 2025 709th aliakseikalosha 563 127 488ms 10 Oct 2024 710th brimstonetrader 562 142 16ms 17 Oct 2024 710th codewrite 🇬🇧 562 142 12ms 5 May 2025 710th RobGLambert 562 142 19ms 8 Jun 2025 710th GodlyProgrammer1 562 142 18ms 22 Nov 2025 710th jbjd 562 142 11ms 4 Feb 2026 715th dokutan 561 155 446ms 10 Feb 2026 716th ravnskjaer 🇩🇰 560 167 506ms 15 Dec 2025 717th FortuiteMan 🇫🇷 559 272 44ms 22 Nov 2025 718th GeneralFabian 558 143 10ms 9 Dec 2024 718th CutSandstone 558 143 11ms 30 Jan 2025 718th kistlerf 🇨🇭 558 143 17ms 19 May 2025 First Prev 641–720 of 1,012 Next Last