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 HumanoidCPU 608 106 12ms 7 Mar 2025 641st daveberlin 608 106 10ms 27 Jun 2025 643rd MeWhenI 🇻🇦 607 111 89ms 2 Oct 2024 644th emgordon154 606 156 8ms 13 Dec 2024 645th alemelis 605 93 467ms 1 Oct 2024 646th roguh 🇬🇹 605 117 1ms 13 Oct 2024 646th iczelia 🇩🇪 605 117 2ms 25 Sep 2025 648th scpchicken 🇵🇼 604 132 17ms 17 hours ago 649th albanian-laundromat 603 72 1ms 25 Feb 2026 650th Mabeloid 🇳🇴 600 133 11ms 2 Oct 2024 651st dokutan 598 116 2ms 19 Nov 2025 652nd MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 653rd tomh1012 597 108 11ms 24 days ago 654th SirBogman 🇺🇸 595 64 172ms 11 Jul 2025 655th MeWhenI 🇻🇦 595 73 2ms 2 Oct 2024 656th bac0id 595 119 2ms 10 Jan 2025 657th arcpolaris 595 120 376ms 28 Jan 2025 658th dokutan 595 159 9ms 19 Oct 2024 659th tatzyr 🇯🇵 591 81 36ms 23 Dec 2024 659th denkyuu1 591 81 39ms 3 days ago 661st RaBa21 🇭🇺 591 135 17ms 19 Jul 2025 662nd DialFrost 🇸🇬 589 67 9ms 25 Jan 2025 663rd Schmitt-Very-Cool 588 159 445ms 26 Sep 2025 664th dokutan 587 174 5ms 21 Feb 2025 665th gigaprofisi 🇺🇸 586 110 10ms 11 Aug 2025 665th denkyuu1 586 110 10ms 5 hours ago 667th sciencedjinn 586 136 10ms 8 Nov 2024 667th mchalunderscore 586 136 18ms 4 Jan 2025 667th Florian-Mt 586 136 17ms 5 Dec 2025 670th Mabeloid 🇳🇴 585 121 1ms 21 Oct 2025 671st amazingalek 🇳🇴 585 122 468ms 1 Jan 2026 672nd olleicua 🇺🇸 584 82 38ms 18 Oct 2024 673rd kurkale6ka 582 137 22ms 16 Oct 2024 673rd 4ndyJ 🇬🇧 582 137 11ms 14 Nov 2024 673rd Mikey-Beep 🇬🇧 582 137 17ms 6 Aug 2025 673rd wobblybits 582 137 19ms 17 Aug 2025 673rd Andrey2001 582 137 9ms 1 Feb 2026 673rd tomh1012 582 137 17ms 4 Mar 2026 673rd Aquateraneal 🇺🇸 582 137 17ms 8 Mar 2026 680th michelebastione 🇮🇹 580 123 431ms 26 Aug 2025 681st emgordon154 579 49 3ms 9 Dec 2025 682nd 823126 576 112 10ms 13 Nov 2024 682nd dokutan 576 112 9ms 22 Jun 2025 682nd snoozingnewt 🇨🇦 576 112 10ms 2 Nov 2025 685th MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 686th jgbaldwinbrown 575 123 2ms 14 Jan 2026 687th KatieLG 🇬🇧 574 99 1,368ms 1 Oct 2024 688th MeWhenI 🇻🇦 572 164 205ms 6 Oct 2024 689th NanduBC 570 140 9ms 1 Oct 2024 689th jmerle 🇳🇱 570 140 10ms 10 Jan 2025 689th RobertHoeh 570 140 11ms 3 Mar 2025 689th smilesformiles3 570 140 17ms 12 Jun 2025 689th artem-aramma 570 140 18ms 18 Jun 2025 694th janAkali 🇷🇺 567 147 355ms 26 days ago 695th FranklinJiaChen 566 141 10ms 2 Oct 2024 696th KatieLG 🇬🇧 563 85 35ms 12 Jan 2025 697th aliakseikalosha 562 127 434ms 10 Oct 2024 698th brimstonetrader 562 142 11ms 17 Oct 2024 698th codewrite 🇬🇧 562 142 10ms 5 May 2025 698th RobGLambert 562 142 17ms 8 Jun 2025 698th GodlyProgrammer1 562 142 18ms 22 Nov 2025 698th jbjd 562 142 11ms 4 Feb 2026 703rd dokutan 561 155 441ms 10 Feb 2026 704th ravnskjaer 🇩🇰 560 167 455ms 15 Dec 2025 705th FortuiteMan 🇫🇷 559 272 40ms 22 Nov 2025 706th GeneralFabian 558 143 10ms 9 Dec 2024 706th CutSandstone 558 143 10ms 30 Jan 2025 706th kistlerf 🇨🇭 558 143 17ms 19 May 2025 709th madex 🇩🇪 556 116 9ms 1 Oct 2024 710th CaedenHarper 🇨🇦 555 104 1,364ms 24 Nov 2025 711th hiichbindermax 554 144 17ms 2 Oct 2024 711th mathisfun271 554 144 10ms 14 Oct 2024 711th bob-th 554 144 10ms 22 Oct 2024 714th MeWhenI 🇻🇦 554 290 8ms 2 Oct 2024 715th mousetail 🇳🇱 553 128 2ms 3 Oct 2024 716th snoozingnewt 🇨🇦 552 148 126ms 20 Nov 2025 717th msbranicky 552 185 4ms 20 Jan 2025 718th edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 719th JunkIce 550 145 10ms 3 Dec 2024 720th ethanlally 550 170 377ms 19 Nov 2025 First Prev 641–720 of 933 Next Last