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 241st sean-niemann 🇺🇸 820 48 4ms 9 Aug 2025 242nd ovs-code 🇩🇪 820 65 5ms 30 Oct 2024 243rd ovs-code 🇩🇪 820 106 458ms 1 Oct 2024 243rd inventshah 820 106 463ms 1 Oct 2024 245th edsrzf 🇳🇿 820 148 40ms 21 days ago 246th MeWhenI 🇻🇦 819 114 470ms 7 Nov 2025 247th frosster 🇨🇦 818 97 2ms 11 Feb 2026 248th GrayJoKing 🇦🇺 818 101 7ms 14 days ago 249th MeWhenI 🇻🇦 817 85 173ms 4 Oct 2024 250th MeWhenI 🇻🇦 817 104 1,025ms 2 Oct 2024 251st canissimia 🇦🇶 817 130 3ms 4 Oct 2024 252nd MeWhenI 🇻🇦 817 186 14ms 2 Oct 2024 253rd Shanethegamer 🇺🇸 816 69 324ms 2 Oct 2024 254th sisyphus-ppcg 🇦🇺 816 83 10ms 2 Oct 2024 255th MeWhenI 🇻🇦 816 85 2ms 5 Oct 2024 256th CLOStrophobic 🇮🇹 815 119 6ms 24 Feb 2025 257th lifthrasiir 🇰🇷 815 197 9ms 19 Dec 2024 258th GolfingSuccess 🇬🇷 814 98 17ms 5 Oct 2024 258th albanian-laundromat 814 98 17ms 3 Nov 2025 260th albanian-laundromat 813 118 4ms 11 Dec 2025 261st emgordon154 813 205 1,455ms 7 Mar 2025 262nd Shanethegamer 🇺🇸 812 70 1,296ms 9 Apr 2025 263rd sean-niemann 🇺🇸 812 115 361ms 24 Sep 2025 263rd stefangimmillaro 812 115 671ms 6 Oct 2025 265th Natanaelel 🇸🇪 811 59 35ms 7 Feb 2025 266th stefangimmillaro 810 126 2ms 3 Oct 2024 267th sean-niemann 🇺🇸 809 82 393ms 23 Dec 2024 268th stefangimmillaro 808 134 41ms 3 Oct 2024 269th GolfingSuccess 🇬🇷 806 31 72ms 5 Oct 2024 270th trinityy-7 806 80 11ms 23 Jul 2025 271st SirBogman 🇺🇸 805 99 16ms 8 Oct 2024 271st solisolu 805 99 17ms 11 hours ago 273rd error256 805 116 494ms 24 Sep 2025 274th albanian-laundromat 805 148 279ms 3 Dec 2025 275th antimon2 🇯🇵 804 70 531ms 9 Oct 2024 276th MeWhenI 🇻🇦 804 127 2ms 5 Oct 2024 276th albanian-laundromat 804 127 3ms 3 Nov 2025 278th GrayJoKing 🇦🇺 803 58 6ms 24 Oct 2024 279th MeWhenI 🇻🇦 803 88 1ms 2 Oct 2024 280th Shanethegamer 🇺🇸 803 138 142ms 3 Oct 2024 281st stefangimmillaro 802 89 453ms 4 Oct 2024 282nd DialFrost 🇸🇬 802 106 24ms 23 Mar 2025 283rd ovs-code 🇩🇪 802 119 16ms 1 Oct 2024 284th albanian-laundromat 802 120 42ms 3 Nov 2025 285th edsrzf 🇳🇿 801 104 437ms 20 days ago 286th Shanethegamer 🇺🇸 801 208 1,457ms 14 Apr 2025 286th DialFrost 🇸🇬 801 208 1,472ms 18 Apr 2025 288th anter69 🇭🇺 800 71 1,213ms 15 days ago 289th duckyluuk 🇳🇱 799 83 458ms 3 Oct 2024 289th emgordon154 799 83 434ms 18 Nov 2024 291st sean-niemann 🇺🇸 799 92 161ms 1 Oct 2025 292nd stefangimmillaro 798 87 137ms 4 Oct 2024 293rd DialFrost 🇸🇬 797 85 7ms 1 Oct 2024 293rd xsot 🇸🇬 797 85 5ms 7 Oct 2024 295th bzijlema 🇳🇱 797 100 18ms 10 Oct 2024 295th bricknellj 797 100 17ms 4 Mar 2025 297th MeWhenI 🇻🇦 797 109 459ms 2 Oct 2024 298th Shanethegamer 🇺🇸 797 128 2ms 3 Oct 2024 299th 2bular 796 49 31ms 8 Nov 2025 300th tayloia 🇬🇧 796 81 9ms 3 Oct 2024 300th targrik 796 81 10ms 8 Feb 2025 302nd m-tkach 🇺🇦 796 138 29ms 3 Oct 2024 303rd DialFrost 🇸🇬 794 84 2,408ms 26 Oct 2024 304th Shanethegamer 🇺🇸 794 102 451ms 4 Oct 2024 305th MeWhenI 🇻🇦 793 90 438ms 2 Oct 2024 306th Natanaelel 🇸🇪 791 48 130ms 1 Oct 2024 307th jared-hughes 791 203 88ms 20 Dec 2024 308th saito-ta 🇯🇵 790 74 7ms 1 Oct 2024 309th ovs-code 🇩🇪 790 84 458ms 3 Oct 2024 309th Shanethegamer 🇺🇸 790 84 451ms 3 Oct 2024 311th pardouin 🇫🇷 789 81 128ms 29 Jan 2025 311th ovs-code 🇩🇪 789 81 139ms 17 Apr 2025 313th Shanethegamer 🇺🇸 789 88 181ms 4 Oct 2024 314th lifthrasiir 🇰🇷 789 101 16ms 21 Nov 2024 314th btjones0 789 101 17ms 2 Dec 2024 316th MeWhenI 🇻🇦 789 122 39ms 5 Oct 2024 317th emgordon154 789 151 288ms 17 Jan 2025 318th emgordon154 787 164 1,815ms 22 Dec 2025 319th KingSkyrock 🇺🇸 786 82 10ms 14 Oct 2024 320th stefangimmillaro 785 61 35ms 1 Oct 2024 First Prev 241–320 of 911 Next Last