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 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 Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions 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 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 Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions 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 159th m-tkach 🇺🇦 859 75 9ms 5 Oct 2024 159th error256 859 75 9ms 7 Oct 2024 163rd edsrzf 🇳🇿 859 113 6ms 23 days ago 164th Bulmenisaurus 857 93 17ms 6 Oct 2024 164th lynn 857 93 16ms 8 Jan 2025 164th CornerMercury 🇬🇧 857 93 16ms 23 Nov 2025 164th KasperKivimaeki 🇫🇮 857 93 17ms 30 Nov 2025 164th blaztoma 🇱🇹 857 93 18ms 18 Dec 2025 169th stefangimmillaro 857 139 282ms 3 Oct 2024 170th ovs-code 🇩🇪 856 46 4ms 4 Oct 2024 170th nwellnhof 🇩🇪 856 46 4ms 7 Oct 2024 172nd edsrzf 🇳🇿 856 90 118ms 18 Dec 2025 173rd m-tkach 🇺🇦 855 87 7ms 6 Oct 2024 174th sean-niemann 🇺🇸 854 56 36ms 8 Aug 2025 175th JayXon 🇺🇸 853 95 445ms 4 Oct 2024 176th sean-niemann 🇺🇸 852 51 2ms 2 Oct 2024 177th MostParsingVex 850 100 1,024ms 1 Oct 2024 178th error256 849 106 85ms 8 Oct 2024 179th kg583 🇺🇸 849 143 40ms 2 days ago 180th emgordon154 848 67 1,283ms 18 Nov 2024 181st DialFrost 🇸🇬 848 94 18ms 1 Oct 2024 181st ndren 848 94 16ms 14 Feb 2025 183rd primo-ppcg 🇹🇭 846 128 41ms 27 Apr 2025 184th lynn 846 131 138ms 8 Jan 2025 185th KasperKivimaeki 🇫🇮 845 141 294ms 9 Oct 2025 186th error256 844 94 2ms 7 Oct 2024 187th KasperKivimaeki 🇫🇮 844 103 396ms 8 Dec 2025 188th IanUtley 844 113 20ms 2 Oct 2024 189th sean-niemann 🇺🇸 844 114 41ms 2 Oct 2024 190th sean-niemann 🇺🇸 844 121 2ms 30 Nov 2024 190th edsrzf 🇳🇿 844 121 3ms 35 hours ago 192nd edsrzf 🇳🇿 842 99 7ms 6 hours ago 193rd m-tkach 🇺🇦 842 144 79ms 8 Oct 2024 194th nwellnhof 🇩🇪 841 84 2ms 2 Oct 2024 194th ovs-code 🇩🇪 841 84 1ms 2 Nov 2024 194th inventshah 841 84 2ms 31 Mar 2025 197th kg583 🇺🇸 840 86 4ms 2 days ago 198th xsot 🇸🇬 839 57 35ms 6 May 2025 199th moustave 839 95 20ms 4 Nov 2024 199th emgordon154 839 95 17ms 18 Nov 2024 201st emplv 🇱🇻 839 142 295ms 2 Oct 2024 201st sean-niemann 🇺🇸 839 142 302ms 2 Oct 2024 203rd GrayJoKing 🇦🇺 838 47 4ms 1 Oct 2024 203rd Steffan153 🇫🇮 838 47 5ms 5 days ago 205th edsrzf 🇳🇿 838 131 28ms 12 days ago 206th edsrzf 🇳🇿 837 83 102ms 26 hours ago 207th snoozingnewt 🇨🇦 837 92 106ms 18 Dec 2025 208th JayXon 🇺🇸 837 109 1,368ms 5 Oct 2024 209th kg583 🇺🇸 837 113 8ms 2 days ago 210th stefangimmillaro 836 68 1,290ms 2 Oct 2024 211th Shanethegamer 🇺🇸 836 77 11ms 1 Oct 2024 211th biocommando 🇫🇮 836 77 11ms 13 Jun 2025 213th sean-niemann 🇺🇸 836 81 10ms 20 Dec 2024 213th Steffan153 🇫🇮 836 81 12ms 11 days ago 215th emplv 🇱🇻 836 145 25ms 24 Oct 2024 216th edsrzf 🇳🇿 835 115 3ms 19 Dec 2025 217th stefangimmillaro 834 80 2,338ms 12 Nov 2024 218th edsrzf 🇳🇿 833 108 82ms 26 Jul 2025 219th stefangimmillaro 833 112 140ms 4 Oct 2024 220th MeWhenI 🇻🇦 833 130 40ms 3 Oct 2024 221st edsrzf 🇳🇿 833 133 154ms 19 Dec 2025 222nd MeWhenI 🇻🇦 833 143 304ms 2 Oct 2024 223rd ovs-code 🇩🇪 833 200 1,401ms 19 Apr 2025 224th JayXon 🇺🇸 832 155 1,904ms 3 Oct 2024 225th saito-ta 🇯🇵 831 85 1ms 1 Oct 2024 226th emplv 🇱🇻 830 77 134ms 28 Mar 2025 227th MeWhenI 🇻🇦 830 96 17ms 30 Jul 2025 228th kg583 🇺🇸 829 80 384ms 2 days ago 229th nwellnhof 🇩🇪 828 105 390ms 22 Jan 2026 230th dcgjb 826 78 11ms 6 May 2025 231st m-tkach 🇺🇦 825 58 39ms 8 Oct 2024 232nd stefangimmillaro 825 99 109ms 3 Oct 2024 233rd retrohun 824 71 9ms 10 Jan 2025 234th DialFrost 🇸🇬 822 82 103ms 23 Jun 2025 235th plcc0 822 97 17ms 12 Jan 2026 236th primo-ppcg 🇹🇭 822 232 525ms 13 Aug 2025 237th sean-niemann 🇺🇸 820 48 4ms 9 Aug 2025 238th ovs-code 🇩🇪 820 65 5ms 30 Oct 2024 239th ovs-code 🇩🇪 820 106 394ms 1 Oct 2024 239th inventshah 820 106 391ms 1 Oct 2024 First Prev 161–240 of 900 Next Last