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 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 Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 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 ArkScript 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 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 ArkScript 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 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 Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 641st SirBogman 🇺🇸 593 64 124ms 11 Jul 2025 642nd bac0id 593 119 2ms 10 Jan 2025 643rd tatzyr 🇯🇵 591 81 37ms 23 Dec 2024 644th RaBa21 🇭🇺 591 135 17ms 19 Jul 2025 645th DialFrost 🇸🇬 588 67 9ms 25 Jan 2025 646th Schmitt-Very-Cool 587 159 445ms 26 Sep 2025 647th dokutan 587 174 5ms 21 Feb 2025 648th gigaprofisi 🇺🇸 586 110 10ms 11 Aug 2025 649th sciencedjinn 586 136 10ms 8 Nov 2024 649th jastrzumb 586 136 18ms 4 Jan 2025 649th Florian-Mt 586 136 17ms 5 Dec 2025 652nd amazingalek 🇳🇴 585 122 458ms 1 Jan 2026 653rd olleicua 🇺🇸 584 82 35ms 18 Oct 2024 654th Mabeloid 🇳🇴 584 121 1ms 21 Oct 2025 655th kurkale6ka 582 137 22ms 16 Oct 2024 655th 4ndyJ 🇬🇧 582 137 11ms 14 Nov 2024 655th Mikey-Beep 🇬🇧 582 137 17ms 6 Aug 2025 655th wobblybits 582 137 19ms 17 Aug 2025 655th Andrey2001 582 137 9ms 1 Feb 2026 655th tomh1012 582 137 17ms 9 days ago 655th Aquateraneal 🇺🇸 582 137 17ms 4 days ago 662nd michelebastione 🇮🇹 580 123 418ms 26 Aug 2025 663rd emgordon154 579 49 3ms 9 Dec 2025 664th MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 665th 823126 575 112 9ms 13 Nov 2024 665th dokutan 575 112 9ms 22 Jun 2025 665th snoozingnewt 🇨🇦 575 112 9ms 2 Nov 2025 668th KatieLG 🇬🇧 574 99 1,368ms 1 Oct 2024 669th jgbaldwinbrown 574 123 2ms 14 Jan 2026 670th scpchicken 🇵🇼 574 139 17ms 6 Oct 2024 671st NanduBC 570 140 9ms 1 Oct 2024 671st jmerle 🇳🇱 570 140 10ms 10 Jan 2025 671st RobertHoeh 570 140 11ms 3 Mar 2025 671st smilesformiles3 570 140 17ms 12 Jun 2025 671st artem-aramma 570 140 18ms 18 Jun 2025 676th MeWhenI 🇻🇦 570 164 197ms 6 Oct 2024 677th janAkali 🇷🇺 567 147 373ms 3 days ago 678th FranklinJiaChen 565 141 10ms 2 Oct 2024 679th KatieLG 🇬🇧 563 85 35ms 12 Jan 2025 680th aliakseikalosha 562 127 456ms 10 Oct 2024 681st brimstonetrader 562 142 11ms 17 Oct 2024 681st codewrite 🇬🇧 562 142 10ms 5 May 2025 681st RobGLambert 562 142 17ms 8 Jun 2025 681st GodlyProgrammer1 562 142 18ms 22 Nov 2025 681st jbjd 562 142 11ms 4 Feb 2026 686th dokutan 561 155 467ms 10 Feb 2026 687th ravnskjaer 🇩🇰 559 167 455ms 15 Dec 2025 688th FortuiteMan 🇫🇷 559 272 36ms 22 Nov 2025 689th GeneralFabian 558 143 10ms 9 Dec 2024 689th CutSandstone 558 143 10ms 30 Jan 2025 689th kistlerf 🇨🇭 558 143 17ms 19 May 2025 692nd madex 🇩🇪 556 116 10ms 1 Oct 2024 693rd CaedenHarper 🇨🇦 555 104 1,139ms 24 Nov 2025 694th hiichbindermax 554 144 17ms 2 Oct 2024 694th mathisfun271 554 144 10ms 14 Oct 2024 694th bob-th 554 144 10ms 22 Oct 2024 697th MeWhenI 🇻🇦 554 290 8ms 2 Oct 2024 698th JDiLenarda 🇫🇷 553 165 1,573ms 1 Oct 2024 699th mousetail 🇳🇱 552 128 2ms 3 Oct 2024 700th snoozingnewt 🇨🇦 552 148 122ms 20 Nov 2025 701st msbranicky 552 185 4ms 20 Jan 2025 702nd edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 703rd JunkIce 550 145 10ms 3 Dec 2024 704th gpikmddk 549 130 464ms 30 Oct 2025 705th ethanlally 549 170 377ms 19 Nov 2025 705th snoozingnewt 🇨🇦 549 170 485ms 5 Dec 2025 707th zakariamouhid 546 118 9ms 1 Oct 2024 708th croc54 546 146 10ms 15 Dec 2024 709th xyangst 546 171 178ms 1 Oct 2024 709th kmathis22 546 171 350ms 19 Nov 2025 711th najs91 545 131 420ms 15 Oct 2024 711th bac0id 545 131 446ms 9 Jan 2025 711th CaedenHarper 🇨🇦 545 131 407ms 17 Oct 2025 714th eranws 542 119 10ms 23 Dec 2024 715th PyryL 🇫🇮 542 147 10ms 1 Mar 2025 716th dokutan 539 107 814ms 24 hours ago 717th dokutan 539 131 2ms 10 Feb 2026 718th Sciman101 539 147 2ms 26 Mar 2025 719th mbittner20 539 148 10ms 13 Oct 2024 719th YAJUE114514 539 148 10ms 12 Dec 2025 First Prev 641–720 of 911 Next Last