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 albanian-laundromat 603 72 1ms 25 Feb 2026 642nd Mabeloid 🇳🇴 600 133 11ms 2 Oct 2024 643rd dokutan 598 116 2ms 19 Nov 2025 644th MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 645th tomh1012 597 108 11ms 20 days ago 646th MeWhenI 🇻🇦 595 73 2ms 2 Oct 2024 647th arcpolaris 595 120 376ms 28 Jan 2025 648th dokutan 595 159 9ms 19 Oct 2024 649th SirBogman 🇺🇸 593 64 172ms 11 Jul 2025 650th bac0id 593 119 2ms 10 Jan 2025 651st tatzyr 🇯🇵 591 81 36ms 23 Dec 2024 652nd RaBa21 🇭🇺 591 135 17ms 19 Jul 2025 653rd DialFrost 🇸🇬 588 67 9ms 25 Jan 2025 654th Schmitt-Very-Cool 587 159 445ms 26 Sep 2025 655th dokutan 587 174 5ms 21 Feb 2025 656th gigaprofisi 🇺🇸 586 110 10ms 11 Aug 2025 657th sciencedjinn 586 136 10ms 8 Nov 2024 657th jastrzumb 586 136 18ms 4 Jan 2025 657th Florian-Mt 586 136 17ms 5 Dec 2025 660th amazingalek 🇳🇴 585 122 468ms 1 Jan 2026 661st olleicua 🇺🇸 584 82 38ms 18 Oct 2024 662nd Mabeloid 🇳🇴 584 121 1ms 21 Oct 2025 663rd kurkale6ka 582 137 22ms 16 Oct 2024 663rd 4ndyJ 🇬🇧 582 137 11ms 14 Nov 2024 663rd Mikey-Beep 🇬🇧 582 137 17ms 6 Aug 2025 663rd wobblybits 582 137 19ms 17 Aug 2025 663rd Andrey2001 582 137 9ms 1 Feb 2026 663rd tomh1012 582 137 17ms 27 days ago 663rd Aquateraneal 🇺🇸 582 137 17ms 23 days ago 670th michelebastione 🇮🇹 580 123 431ms 26 Aug 2025 671st emgordon154 579 49 3ms 9 Dec 2025 672nd 823126 576 112 10ms 13 Nov 2024 672nd dokutan 576 112 9ms 22 Jun 2025 672nd snoozingnewt 🇨🇦 576 112 10ms 2 Nov 2025 675th MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 676th KatieLG 🇬🇧 574 99 1,368ms 1 Oct 2024 677th jgbaldwinbrown 574 123 2ms 14 Jan 2026 678th scpchicken 🇵🇼 574 139 17ms 6 Oct 2024 679th NanduBC 570 140 9ms 1 Oct 2024 679th jmerle 🇳🇱 570 140 10ms 10 Jan 2025 679th RobertHoeh 570 140 11ms 3 Mar 2025 679th smilesformiles3 570 140 17ms 12 Jun 2025 679th artem-aramma 570 140 18ms 18 Jun 2025 684th MeWhenI 🇻🇦 570 164 205ms 6 Oct 2024 685th janAkali 🇷🇺 567 147 355ms 22 days ago 686th FranklinJiaChen 566 141 10ms 2 Oct 2024 687th KatieLG 🇬🇧 563 85 35ms 12 Jan 2025 688th aliakseikalosha 562 127 434ms 10 Oct 2024 689th brimstonetrader 562 142 11ms 17 Oct 2024 689th codewrite 🇬🇧 562 142 10ms 5 May 2025 689th RobGLambert 562 142 17ms 8 Jun 2025 689th GodlyProgrammer1 562 142 18ms 22 Nov 2025 689th jbjd 562 142 11ms 4 Feb 2026 694th dokutan 561 155 441ms 10 Feb 2026 695th ravnskjaer 🇩🇰 559 167 455ms 15 Dec 2025 696th FortuiteMan 🇫🇷 559 272 40ms 22 Nov 2025 697th GeneralFabian 558 143 10ms 9 Dec 2024 697th CutSandstone 558 143 10ms 30 Jan 2025 697th kistlerf 🇨🇭 558 143 17ms 19 May 2025 700th madex 🇩🇪 556 116 9ms 1 Oct 2024 700th denkyuu1 556 116 11ms 16 days ago 702nd CaedenHarper 🇨🇦 555 104 1,364ms 24 Nov 2025 703rd hiichbindermax 554 144 17ms 2 Oct 2024 703rd mathisfun271 554 144 10ms 14 Oct 2024 703rd bob-th 554 144 10ms 22 Oct 2024 706th MeWhenI 🇻🇦 554 290 8ms 2 Oct 2024 707th mousetail 🇳🇱 552 128 2ms 3 Oct 2024 708th snoozingnewt 🇨🇦 552 148 126ms 20 Nov 2025 709th msbranicky 552 185 4ms 20 Jan 2025 710th edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 711th JunkIce 550 145 10ms 3 Dec 2024 712th gpikmddk 549 130 417ms 30 Oct 2025 713th JDiLenarda 🇫🇷 549 165 1,394ms 1 Oct 2024 714th ethanlally 549 170 377ms 19 Nov 2025 714th snoozingnewt 🇨🇦 549 170 485ms 5 Dec 2025 716th Matter1024 🇮🇳 548 149 445ms 9 days ago 717th zakariamouhid 546 118 9ms 1 Oct 2024 718th croc54 546 146 10ms 15 Dec 2024 719th xyangst 546 171 171ms 1 Oct 2024 719th kmathis22 546 171 350ms 19 Nov 2025 First Prev 641–720 of 921 Next Last