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 640th iczelia 🇩🇪 604 117 2ms 25 Sep 2025 642nd albanian-laundromat 603 72 1ms 25 Feb 2026 643rd Mabeloid 🇳🇴 600 133 11ms 2 Oct 2024 644th dokutan 598 116 2ms 19 Nov 2025 645th MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 646th tomh1012 597 108 11ms 21 days ago 647th MeWhenI 🇻🇦 595 73 2ms 2 Oct 2024 648th arcpolaris 595 120 376ms 28 Jan 2025 649th dokutan 595 159 9ms 19 Oct 2024 650th bac0id 594 119 2ms 10 Jan 2025 651st SirBogman 🇺🇸 593 64 172ms 11 Jul 2025 652nd tatzyr 🇯🇵 591 81 36ms 23 Dec 2024 652nd denkyuu1 591 81 39ms 2 hours ago 654th RaBa21 🇭🇺 591 135 17ms 19 Jul 2025 655th DialFrost 🇸🇬 588 67 9ms 25 Jan 2025 656th Schmitt-Very-Cool 588 159 445ms 26 Sep 2025 657th dokutan 587 174 5ms 21 Feb 2025 658th gigaprofisi 🇺🇸 586 110 10ms 11 Aug 2025 659th sciencedjinn 586 136 10ms 8 Nov 2024 659th jastrzumb 586 136 18ms 4 Jan 2025 659th Florian-Mt 586 136 17ms 5 Dec 2025 662nd amazingalek 🇳🇴 585 122 468ms 1 Jan 2026 663rd olleicua 🇺🇸 584 82 38ms 18 Oct 2024 664th Mabeloid 🇳🇴 584 121 1ms 21 Oct 2025 665th kurkale6ka 582 137 22ms 16 Oct 2024 665th 4ndyJ 🇬🇧 582 137 11ms 14 Nov 2024 665th Mikey-Beep 🇬🇧 582 137 17ms 6 Aug 2025 665th wobblybits 582 137 19ms 17 Aug 2025 665th Andrey2001 582 137 9ms 1 Feb 2026 665th tomh1012 582 137 17ms 4 Mar 2026 665th Aquateraneal 🇺🇸 582 137 17ms 25 days ago 672nd michelebastione 🇮🇹 580 123 431ms 26 Aug 2025 673rd emgordon154 579 49 3ms 9 Dec 2025 674th 823126 576 112 10ms 13 Nov 2024 674th dokutan 576 112 9ms 22 Jun 2025 674th snoozingnewt 🇨🇦 576 112 10ms 2 Nov 2025 677th MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 678th jgbaldwinbrown 575 123 2ms 14 Jan 2026 679th KatieLG 🇬🇧 574 99 1,368ms 1 Oct 2024 680th scpchicken 🇵🇼 574 139 17ms 6 Oct 2024 681st MeWhenI 🇻🇦 572 164 205ms 6 Oct 2024 682nd NanduBC 570 140 9ms 1 Oct 2024 682nd jmerle 🇳🇱 570 140 10ms 10 Jan 2025 682nd RobertHoeh 570 140 11ms 3 Mar 2025 682nd smilesformiles3 570 140 17ms 12 Jun 2025 682nd artem-aramma 570 140 18ms 18 Jun 2025 687th janAkali 🇷🇺 567 147 355ms 23 days ago 688th FranklinJiaChen 566 141 10ms 2 Oct 2024 689th KatieLG 🇬🇧 563 85 35ms 12 Jan 2025 690th aliakseikalosha 562 127 434ms 10 Oct 2024 691st brimstonetrader 562 142 11ms 17 Oct 2024 691st codewrite 🇬🇧 562 142 10ms 5 May 2025 691st RobGLambert 562 142 17ms 8 Jun 2025 691st GodlyProgrammer1 562 142 18ms 22 Nov 2025 691st jbjd 562 142 11ms 4 Feb 2026 696th dokutan 561 155 441ms 10 Feb 2026 697th ravnskjaer 🇩🇰 560 167 455ms 15 Dec 2025 698th FortuiteMan 🇫🇷 559 272 40ms 22 Nov 2025 699th GeneralFabian 558 143 10ms 9 Dec 2024 699th CutSandstone 558 143 10ms 30 Jan 2025 699th kistlerf 🇨🇭 558 143 17ms 19 May 2025 702nd madex 🇩🇪 556 116 9ms 1 Oct 2024 702nd denkyuu1 556 116 11ms 18 days ago 704th CaedenHarper 🇨🇦 555 104 1,364ms 24 Nov 2025 705th hiichbindermax 554 144 17ms 2 Oct 2024 705th mathisfun271 554 144 10ms 14 Oct 2024 705th bob-th 554 144 10ms 22 Oct 2024 708th MeWhenI 🇻🇦 554 290 8ms 2 Oct 2024 709th mousetail 🇳🇱 552 128 2ms 3 Oct 2024 710th snoozingnewt 🇨🇦 552 148 126ms 20 Nov 2025 711th msbranicky 552 185 4ms 20 Jan 2025 712th edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 713th JunkIce 550 145 10ms 3 Dec 2024 714th ethanlally 550 170 377ms 19 Nov 2025 714th snoozingnewt 🇨🇦 550 170 485ms 5 Dec 2025 714th jusaka 550 170 355ms 10 hours ago 717th gpikmddk 549 130 417ms 30 Oct 2025 718th JDiLenarda 🇫🇷 549 165 1,394ms 1 Oct 2024 719th Matter1024 🇮🇳 548 149 445ms 11 days ago 720th xyangst 548 171 171ms 1 Oct 2024 First Prev 641–720 of 928 Next Last