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 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 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 ><> ALGOL 68 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 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 ><> ALGOL 68 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 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 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 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 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 401st commandz0 🇺🇸 745 107 17ms 7 Oct 2024 401st zbreit 🇺🇸 745 107 16ms 29 Oct 2024 401st StardustGogeta 745 107 17ms 30 Oct 2024 401st ZakkkkAttackkkk 🇵🇭 745 107 16ms 8 Feb 2025 401st InigoK 🇺🇸 745 107 17ms 22 Sep 2025 401st Lv0Sys 🇵🇱 745 107 17ms 19 days ago 407th Shanethegamer 🇺🇸 744 121 89ms 3 Oct 2024 408th Natanaelel 🇸🇪 743 53 3ms 10 Jan 2026 409th SirBogman 🇺🇸 741 63 283ms 23 Jul 2025 410th KrausRaus 🇺🇸 741 87 14ms 1 Oct 2024 410th GeorgeStechman 🇬🇧 741 87 11ms 24 Oct 2024 410th coreynash 741 87 9ms 13 Feb 2025 413th Shanethegamer 🇺🇸 741 90 2,349ms 28 Oct 2024 413th ScottHamper 741 90 2,298ms 11 Dec 2025 415th DialFrost 🇸🇬 741 131 7ms 11 Dec 2024 416th DialFrost 🇸🇬 740 76 813ms 9 Oct 2024 417th neihousaigaai 738 108 17ms 4 Oct 2024 417th StefanHabel 🇨🇦 738 108 15ms 23 Jan 2025 417th CaedenHarper 🇨🇦 738 108 17ms 22 Jul 2025 417th BrunoVisnadi 🇧🇷 738 108 16ms 1 Oct 2025 421st lifthrasiir 🇰🇷 737 90 459ms 2 Dec 2024 422nd anter69 🇭🇺 736 65 35ms 15 days ago 423rd stefangimmillaro 736 92 8ms 2 Oct 2024 423rd Shanethegamer 🇺🇸 736 92 5ms 3 Oct 2024 425th MeWhenI 🇻🇦 736 111 128ms 2 Oct 2024 426th MeWhenI 🇻🇦 735 34 55ms 2 Oct 2024 426th emgordon154 735 34 63ms 11 Sep 2025 426th plcc0 735 34 68ms 31 Jan 2026 429th Shanethegamer 🇺🇸 735 100 162ms 24 May 2025 430th Shanethegamer 🇺🇸 735 132 7ms 2 Oct 2024 431st Kacarott 🇦🇺 734 73 1,111ms 1 Oct 2024 431st chunes3 🇺🇸 734 73 1,046ms 2 Oct 2024 433rd Shanethegamer 🇺🇸 733 116 1,027ms 1 Oct 2024 434th kirjavascript 732 88 11ms 15 Mar 2025 435th stefangimmillaro 731 114 376ms 13 Oct 2024 436th edsrzf 🇳🇿 730 52 118ms 16 Jan 2026 437th Shanethegamer 🇺🇸 729 112 106ms 3 Oct 2024 438th error256 728 98 416ms 17 Jan 2026 439th MeWhenI 🇻🇦 726 88 130ms 2 Oct 2024 439th Shanethegamer 🇺🇸 726 88 135ms 8 Jan 2025 441st cros107 🇦🇺 725 110 17ms 1 Jan 2025 441st guilhem-roy 🇫🇷 725 110 17ms 29 May 2025 443rd dtbao20 🇻🇳 724 89 10ms 1 Oct 2024 443rd madeforlosers 724 89 11ms 17 Oct 2024 443rd junkondo-jp 724 89 11ms 14 Dec 2024 443rd alexsave 724 89 10ms 20 Jan 2026 447th Shanethegamer 🇺🇸 724 126 1,391ms 2 Oct 2024 448th Shanethegamer 🇺🇸 723 96 2ms 3 Oct 2024 449th annaproxy 723 132 15ms 1 Oct 2024 450th MeWhenI 🇻🇦 721 78 316ms 2 Oct 2024 451st dokutan 721 92 392ms 28 hours ago 452nd MeWhenI 🇻🇦 721 179 1,697ms 7 Nov 2025 453rd weeble 720 74 6ms 1 Jul 2025 454th voytxt 🇨🇿 718 89 148ms 17 Apr 2025 455th mousetail 🇳🇱 718 111 17ms 6 Oct 2024 456th snyderek 🇺🇸 718 121 71ms 1 Oct 2024 457th Shanethegamer 🇺🇸 715 101 5ms 2 Oct 2024 458th ovs-code 🇩🇪 714 75 1,104ms 1 Oct 2024 459th SirBogman 🇺🇸 713 93 503ms 23 Jul 2025 459th snoozingnewt 🇨🇦 713 93 469ms 6 Dec 2025 461st rzv-me 713 95 5ms 5 Oct 2024 462nd DialFrost 🇸🇬 713 106 12ms 13 Dec 2024 463rd h3ra993huskp 🇯🇵 713 131 422ms 30 Nov 2025 464th OllieBoyne 🇬🇧 712 112 17ms 17 Oct 2024 464th WillConker 712 112 12ms 22 Oct 2024 464th maxgodfrey2004 🇨🇦 712 112 10ms 4 Jan 2025 464th Babafaba 712 112 16ms 11 Nov 2025 468th Natanaelel 🇸🇪 709 55 34ms 1 Mar 2025 469th snoozingnewt 🇨🇦 709 95 79ms 23 Oct 2025 470th DialFrost 🇸🇬 708 132 238ms 8 Apr 2025 471st Alex-x90 🇺🇸 706 100 2ms 1 Oct 2024 472nd SB-945 706 113 17ms 1 Oct 2024 472nd Artemis21 🇬🇧 706 113 17ms 23 Jan 2025 472nd fkantelberg 706 113 10ms 11 Jul 2025 475th Shanethegamer 🇺🇸 706 118 376ms 2 Oct 2024 476th BlankSpruce 706 123 467ms 1 Oct 2024 477th cbrt-x 706 157 139ms 1 Oct 2024 478th Shanethegamer 🇺🇸 706 172 39ms 2 Oct 2024 479th edsrzf 🇳🇿 705 76 1,005ms 1 Oct 2024 480th janlelis 704 68 39ms 1 Oct 2024 First Prev 401–480 of 911 Next Last