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 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 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 Calendar 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 Multitap Input NFA Simulator 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 Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 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 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 Calendar 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 Multitap Input NFA Simulator 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 601st RaBa21 🇭🇺 590 135 15ms 19 Jul 2025 602nd DialFrost 🇸🇬 586 67 9ms 25 Jan 2025 603rd sciencedjinn 586 136 9ms 8 Nov 2024 603rd ihatethefrench 586 136 17ms 4 Jan 2025 603rd Florian-Mt 586 136 15ms 30 hours ago 606th Schmitt-Very-Cool 586 159 339ms 26 Sep 2025 607th gigaprofisi 🇺🇸 585 110 10ms 11 Aug 2025 608th dokutan 584 174 5ms 21 Feb 2025 609th Trip-kun 583 136 2ms 5 Oct 2024 610th olleicua 🇺🇸 582 82 33ms 18 Oct 2024 611th Mabeloid 🇳🇴 582 121 2ms 21 Oct 2025 612th kurkale6ka 581 137 21ms 16 Oct 2024 612th 4ndyJ 🇬🇧 581 137 10ms 14 Nov 2024 612th Mikey-Beep 🇬🇧 581 137 16ms 6 Aug 2025 612th wobblybits 581 137 15ms 17 Aug 2025 616th michelebastione 🇮🇹 579 123 375ms 26 Aug 2025 617th MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 618th 823126 575 112 8ms 13 Nov 2024 618th dokutan 575 112 9ms 22 Jun 2025 618th snoozingnewt 🇨🇦 575 112 9ms 2 Nov 2025 621st albanian-laundromat 574 77 2ms 3 Nov 2025 622nd KatieLG 🇬🇧 574 99 1,081ms 1 Oct 2024 623rd scpchicken 🇵🇼 573 139 16ms 6 Oct 2024 624th NanduBC 569 140 10ms 1 Oct 2024 624th jmerle 🇳🇱 569 140 10ms 10 Jan 2025 624th RobertHoeh 569 140 12ms 3 Mar 2025 624th smilesformiles3 569 140 20ms 12 Jun 2025 624th artem-aramma 569 140 23ms 18 Jun 2025 624th Andrey2001 569 140 13ms 9 days ago 630th MeWhenI 🇻🇦 569 164 209ms 6 Oct 2024 631st CaedenHarper 🇨🇦 565 104 738ms 12 days ago 632nd FranklinJiaChen 565 141 9ms 2 Oct 2024 633rd KatieLG 🇬🇧 562 85 36ms 12 Jan 2025 634th aliakseikalosha 561 127 401ms 10 Oct 2024 635th brimstonetrader 561 142 9ms 17 Oct 2024 635th codewrite 🇬🇧 561 142 10ms 5 May 2025 635th RobGLambert 561 142 16ms 8 Jun 2025 635th GodlyProgrammer1 561 142 27ms 14 days ago 639th FortuiteMan 🇫🇷 559 272 37ms 14 days ago 640th GeneralFabian 557 143 10ms 9 Dec 2024 640th CutSandstone 557 143 10ms 30 Jan 2025 640th kistlerf 🇨🇭 557 143 17ms 19 May 2025 643rd madex 🇩🇪 555 116 9ms 1 Oct 2024 644th MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 645th hiichbindermax 553 144 16ms 2 Oct 2024 645th mathisfun271 553 144 14ms 14 Oct 2024 645th bob-th 553 144 9ms 22 Oct 2024 648th JDiLenarda 🇫🇷 553 165 1,278ms 1 Oct 2024 649th KatieLG 🇬🇧 552 120 479ms 1 Oct 2024 650th snoozingnewt 🇨🇦 552 148 114ms 16 days ago 651st edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 652nd mousetail 🇳🇱 550 128 2ms 3 Oct 2024 653rd msbranicky 550 185 4ms 20 Jan 2025 654th JunkIce 549 145 13ms 3 Dec 2024 654th Flekay 🇩🇪 549 145 10ms 10 Jul 2025 656th ethanlally 549 170 330ms 17 days ago 656th snoozingnewt 🇨🇦 549 170 339ms 25 hours ago 658th gpikmddk 548 130 367ms 30 Oct 2025 659th emgordon154 546 52 2ms 3 Nov 2024 660th croc54 546 146 11ms 15 Dec 2024 661st zakariamouhid 545 118 9ms 1 Oct 2024 661st JOrE20 🇺🇸 545 118 9ms 5 days ago 663rd xyangst 545 171 171ms 1 Oct 2024 663rd kmathis22 545 171 344ms 17 days ago 665th najs91 544 131 343ms 15 Oct 2024 665th bac0id 544 131 370ms 9 Jan 2025 665th CaedenHarper 🇨🇦 544 131 340ms 17 Oct 2025 668th dokutan 543 122 479ms 19 Oct 2024 669th PyryL 🇫🇮 542 147 10ms 1 Mar 2025 670th eranws 541 119 10ms 23 Dec 2024 671st Sciman101 539 147 2ms 26 Mar 2025 672nd mbittner20 538 148 9ms 13 Oct 2024 673rd psaban 535 149 16ms 31 Jul 2025 673rd TheZwierzLF 🇵🇱 535 149 11ms 12 days ago 675th msbranicky 533 175 162ms 13 Dec 2024 First Prev 601–675 of 839 Next Last