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 Dragon Curve 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 Dragon Curve 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 nstearns96 🇬🇧 614 130 17ms 2 Oct 2024 640th Stockoh 🇫🇷 614 130 17ms 4 Jul 2025 643rd MeWhenI 🇻🇦 612 111 89ms 2 Oct 2024 644th kaascevich 612 134 126ms 9 Jul 2025 645th Seanharrs 🇦🇺 611 117 454ms 15 Nov 2024 646th Shanethegamer 🇺🇸 610 154 153ms 3 Oct 2024 647th inverseLorentz 🇦🇺 609 131 12ms 7 Oct 2024 647th sciencejiho 609 131 24ms 11 Feb 2025 647th Jaydosu 609 131 11ms 11 Apr 2025 647th Emutis 🇱🇹 609 131 10ms 11 Nov 2025 651st emgordon154 609 156 9ms 13 Dec 2024 652nd HumanoidCPU 608 106 11ms 7 Mar 2025 652nd daveberlin 608 106 11ms 27 Jun 2025 654th albanian-laundromat 🇺🇸 606 72 1ms 25 Feb 2026 655th alemelis 606 93 468ms 1 Oct 2024 656th roguh 🇬🇹 605 117 1ms 13 Oct 2024 656th iczelia 🇩🇪 605 117 2ms 25 Sep 2025 658th sultan 604 132 17ms 8 days ago 659th dokutan 602 116 2ms 19 Nov 2025 660th Mabeloid 🇳🇴 600 133 10ms 2 Oct 2024 661st MeWhenI 🇻🇦 597 73 2ms 2 Oct 2024 662nd MeWhenI 🇻🇦 597 98 8ms 1 Oct 2024 663rd tomh1012 597 108 11ms 12 Mar 2026 664th dokutan 597 159 6ms 19 Oct 2024 665th SirBogman 🇺🇸 596 64 152ms 11 Jul 2025 666th arcpolaris 596 120 433ms 28 Jan 2025 667th bac0id 595 119 2ms 10 Jan 2025 668th tatzyr 🇯🇵 592 81 35ms 23 Dec 2024 669th RaBa21 🇭🇺 591 135 17ms 19 Jul 2025 669th Mikey-Beep 🇬🇧 591 135 17ms 11 days ago 671st DialFrost 🇸🇬 590 67 8ms 25 Jan 2025 672nd dokutan 589 174 5ms 21 Feb 2025 673rd Schmitt-Very-Cool 588 159 445ms 26 Sep 2025 674th sciencedjinn 587 136 10ms 8 Nov 2024 674th mchalunderscore 587 136 20ms 4 Jan 2025 674th Florian-Mt 587 136 17ms 5 Dec 2025 677th gigaprofisi 🇺🇸 586 110 11ms 11 Aug 2025 677th denkyuu1 586 110 11ms 18 days ago 677th RealBen9 🇬🇧 586 110 10ms 5 days ago 680th amazingalek 🇳🇴 586 122 501ms 1 Jan 2026 681st olleicua 🇺🇸 585 82 37ms 18 Oct 2024 682nd Mabeloid 🇳🇴 585 121 1ms 21 Oct 2025 683rd michelebastione 🇮🇹 582 123 483ms 26 Aug 2025 683rd matanberstadt 582 123 442ms 10 days ago 685th kurkale6ka 582 137 29ms 16 Oct 2024 685th 4ndyJ 🇬🇧 582 137 12ms 14 Nov 2024 685th wobblybits 582 137 18ms 17 Aug 2025 685th Andrey2001 582 137 16ms 1 Feb 2026 685th tomh1012 582 137 18ms 4 Mar 2026 685th Aquateraneal 🇺🇸 582 137 18ms 8 Mar 2026 691st MeWhenI 🇻🇦 581 331 15ms 2 Oct 2024 692nd emgordon154 580 49 3ms 9 Dec 2025 693rd KatieLG 🇬🇧 576 99 1,400ms 1 Oct 2024 694th 823126 576 112 10ms 13 Nov 2024 694th dokutan 576 112 10ms 22 Jun 2025 694th snoozingnewt 🇨🇦 576 112 11ms 2 Nov 2025 697th jgbaldwinbrown 576 123 2ms 14 Jan 2026 698th MeWhenI 🇻🇦 572 164 196ms 6 Oct 2024 699th janAkali 🇷🇺 571 147 355ms 10 Mar 2026 700th NanduBC 570 140 11ms 1 Oct 2024 700th jmerle 🇳🇱 570 140 10ms 10 Jan 2025 700th RobertHoeh 570 140 10ms 3 Mar 2025 700th smilesformiles3 570 140 18ms 12 Jun 2025 700th artem-aramma 570 140 16ms 18 Jun 2025 705th FranklinJiaChen 566 141 13ms 2 Oct 2024 706th KatieLG 🇬🇧 564 85 40ms 12 Jan 2025 707th aliakseikalosha 563 127 488ms 10 Oct 2024 708th brimstonetrader 562 142 16ms 17 Oct 2024 708th codewrite 🇬🇧 562 142 12ms 5 May 2025 708th RobGLambert 562 142 19ms 8 Jun 2025 708th GodlyProgrammer1 562 142 18ms 22 Nov 2025 708th jbjd 562 142 11ms 4 Feb 2026 713th dokutan 561 155 446ms 10 Feb 2026 714th ravnskjaer 🇩🇰 560 167 455ms 15 Dec 2025 715th FortuiteMan 🇫🇷 559 272 44ms 22 Nov 2025 716th GeneralFabian 558 143 10ms 9 Dec 2024 716th CutSandstone 558 143 11ms 30 Jan 2025 716th kistlerf 🇨🇭 558 143 17ms 19 May 2025 719th CaedenHarper 🇨🇦 556 104 1,098ms 24 Nov 2025 720th madex 🇩🇪 556 116 16ms 1 Oct 2024 First Prev 641–720 of 1,009 Next Last