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 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 Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions 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 ><> 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 ALGOL 68 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 ><> 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 ALGOL 68 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 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 Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions 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 michelebastione 🇮🇹 580 123 418ms 26 Aug 2025 642nd emgordon154 579 49 3ms 9 Dec 2025 643rd MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 644th 823126 575 112 10ms 13 Nov 2024 644th dokutan 575 112 9ms 22 Jun 2025 644th snoozingnewt 🇨🇦 575 112 10ms 2 Nov 2025 647th KatieLG 🇬🇧 574 99 1,368ms 1 Oct 2024 648th jgbaldwinbrown 574 123 2ms 27 days ago 649th scpchicken 🇵🇼 573 139 17ms 6 Oct 2024 649th tomh1012 573 139 19ms 26 days ago 649th Flekay 🇩🇪 573 139 10ms 72 mins ago 652nd NanduBC 569 140 13ms 1 Oct 2024 652nd jmerle 🇳🇱 569 140 14ms 10 Jan 2025 652nd RobertHoeh 569 140 12ms 3 Mar 2025 652nd smilesformiles3 569 140 17ms 12 Jun 2025 652nd artem-aramma 569 140 18ms 18 Jun 2025 657th MeWhenI 🇻🇦 569 164 194ms 6 Oct 2024 658th CaedenHarper 🇨🇦 567 104 1,139ms 24 Nov 2025 659th FranklinJiaChen 565 141 10ms 2 Oct 2024 660th albanian-laundromat 564 77 2ms 3 Nov 2025 661st KatieLG 🇬🇧 563 85 36ms 12 Jan 2025 662nd aliakseikalosha 562 127 487ms 10 Oct 2024 663rd brimstonetrader 561 142 11ms 17 Oct 2024 663rd codewrite 🇬🇧 561 142 10ms 5 May 2025 663rd RobGLambert 561 142 18ms 8 Jun 2025 663rd GodlyProgrammer1 561 142 19ms 22 Nov 2025 663rd jbjd 561 142 13ms 7 days ago 668th dokutan 561 155 396ms 24 hours ago 669th ravnskjaer 🇩🇰 559 167 455ms 15 Dec 2025 670th FortuiteMan 🇫🇷 559 272 36ms 22 Nov 2025 671st GeneralFabian 557 143 11ms 9 Dec 2024 671st CutSandstone 557 143 10ms 30 Jan 2025 671st kistlerf 🇨🇭 557 143 19ms 19 May 2025 674th madex 🇩🇪 555 116 9ms 1 Oct 2024 675th hiichbindermax 554 144 17ms 2 Oct 2024 675th mathisfun271 554 144 10ms 14 Oct 2024 675th bob-th 554 144 10ms 22 Oct 2024 678th MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 679th JDiLenarda 🇫🇷 553 165 1,573ms 1 Oct 2024 680th mousetail 🇳🇱 552 128 2ms 3 Oct 2024 681st snoozingnewt 🇨🇦 552 148 121ms 20 Nov 2025 682nd edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 683rd JunkIce 550 145 11ms 3 Dec 2024 683rd denkyuu1 550 145 18ms 17 mins ago 685th msbranicky 550 185 4ms 20 Jan 2025 686th gpikmddk 549 130 464ms 30 Oct 2025 687th ethanlally 549 170 377ms 19 Nov 2025 687th snoozingnewt 🇨🇦 549 170 485ms 5 Dec 2025 689th zakariamouhid 546 118 11ms 1 Oct 2024 690th croc54 546 146 10ms 15 Dec 2024 691st kmathis22 546 171 350ms 19 Nov 2025 692nd najs91 545 131 444ms 15 Oct 2024 692nd bac0id 545 131 486ms 9 Jan 2025 692nd CaedenHarper 🇨🇦 545 131 407ms 17 Oct 2025 695th xyangst 545 171 176ms 1 Oct 2024 696th dokutan 543 122 409ms 19 Oct 2024 697th PyryL 🇫🇮 542 147 10ms 1 Mar 2025 698th eranws 541 119 10ms 23 Dec 2024 699th dokutan 539 131 2ms 24 hours ago 700th Sciman101 539 147 2ms 26 Mar 2025 701st mbittner20 539 148 11ms 13 Oct 2024 701st YAJUE114514 539 148 11ms 12 Dec 2025 703rd psaban 535 149 15ms 31 Jul 2025 703rd TheZwierzLF 🇵🇱 535 149 11ms 24 Nov 2025 705th msbranicky 533 175 164ms 13 Dec 2024 706th deancureton 532 121 12ms 30 Dec 2024 707th FlorianCassayre 🇫🇷 531 150 18ms 1 Oct 2024 707th jameswmccarty 531 150 10ms 5 Oct 2024 707th yousefalizadeh 531 150 10ms 23 Oct 2024 707th feherd 531 150 14ms 31 Oct 2024 707th kadamkaustubh 531 150 10ms 8 Nov 2025 712th msbranicky 530 126 2,523ms 9 Jan 2025 713th Macweese 525 178 406ms 3 Aug 2025 714th adamnielson42 🇺🇸 524 152 10ms 6 Oct 2024 714th voidgloom 524 152 11ms 22 Oct 2024 714th omero-san 524 152 12ms 22 Sep 2025 714th brochmann 🇸🇪 524 152 10ms 12 Oct 2025 718th isaiah0311 🇺🇸 523 135 2ms 2 days ago 719th galloj 🇨🇿 522 112 19ms 4 Oct 2024 720th TheZwierzLF 🇵🇱 522 127 507ms 12 Dec 2025 First Prev 641–720 of 888 Next Last