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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 Nim 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 Nim 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 100th error256 888 54 36ms 7 Oct 2024 100th nwellnhof 🇩🇪 888 54 39ms 13 Oct 2024 100th blaztoma 🇱🇹 888 54 37ms 19 days ago 104th lyphyser 886 41 55ms 1 Oct 2024 105th canissimia 🇦🇶 886 66 9ms 1 Oct 2024 106th nwellnhof 🇩🇪 886 90 20ms 1 Oct 2024 106th ovs-code 🇩🇪 886 90 18ms 3 Oct 2024 106th kg583 🇺🇸 886 90 18ms 9 Oct 2024 106th sean-niemann 🇺🇸 886 90 25ms 23 Dec 2024 106th firegene 🇮🇪 886 90 16ms 19 Feb 2026 106th lukegustafson 🇺🇸 886 90 18ms 25 Feb 2026 112th acotis 886 106 151ms 29 May 2025 113th nwellnhof 🇩🇪 885 135 328ms 16 Oct 2024 113th edsrzf 🇳🇿 885 135 303ms 21 Feb 2026 115th dmrichwa 🇺🇸 884 73 12ms 5 Oct 2024 115th DialFrost 🇸🇬 884 73 11ms 12 Oct 2024 117th ovs-code 🇩🇪 883 69 4ms 4 Oct 2024 117th edsrzf 🇳🇿 883 69 4ms 10 Nov 2025 119th JayXon 🇺🇸 883 79 111ms 17 Oct 2024 120th GrayJoKing 🇦🇺 883 90 2ms 3 Oct 2024 120th FlyingPenguin223 883 90 2ms 16 Oct 2024 122nd JayXon 🇺🇸 883 95 418ms 23 Jul 2025 123rd JayXon 🇺🇸 881 93 121ms 14 Oct 2024 124th sean-niemann 🇺🇸 880 76 2,661ms 24 Oct 2024 125th JayXon 🇺🇸 879 84 163ms 24 May 2025 126th edsrzf 🇳🇿 878 110 7ms 21 Mar 2026 127th 5cw 🇺🇸 877 91 17ms 1 Oct 2024 127th stefangimmillaro 877 91 22ms 13 Oct 2024 127th duckyluuk 🇳🇱 877 91 21ms 18 Oct 2024 127th GrayJoKing 🇦🇺 877 91 20ms 2 Jul 2025 131st xsot 🇸🇬 876 66 803ms 22 Feb 2026 132nd JayXon 🇺🇸 876 117 2ms 5 Oct 2024 133rd ovs-code 🇩🇪 876 127 127ms 2 Oct 2024 134th AlephSquirrel 874 76 483ms 1 Oct 2024 135th edsrzf 🇳🇿 874 107 798ms 20 Feb 2026 136th Shanethegamer 🇺🇸 873 91 2ms 4 Oct 2024 137th pardouin 🇫🇷 872 55 39ms 3 Oct 2024 137th ovs-code 🇩🇪 872 55 37ms 5 Oct 2024 137th Steffan153 🇫🇮 872 55 42ms 16 Feb 2026 140th Natanaelel 🇸🇪 872 74 13ms 1 Oct 2024 140th helbling 🇨🇭 872 74 13ms 1 Oct 2024 140th Irratix 🇳🇱 872 74 13ms 14 Oct 2024 140th emgordon154 872 74 12ms 18 Nov 2024 144th error256 872 109 10ms 24 Jul 2025 144th edsrzf 🇳🇿 872 109 7ms 24 Jul 2025 144th zacjl 872 109 9ms 27 Mar 2026 147th ovs-code 🇩🇪 870 78 124ms 2 Oct 2024 148th UnderKoen 🇳🇱 870 86 7ms 4 Oct 2024 149th JayXon 🇺🇸 870 104 84ms 6 Oct 2024 150th kg583 🇺🇸 870 111 7ms 20 Feb 2026 151st GrayJoKing 🇦🇺 869 87 12ms 25 Nov 2025 152nd kumavale 869 108 153ms 21 days ago 153rd emgordon154 868 77 2,598ms 8 Nov 2024 154th edsrzf 🇳🇿 867 82 5ms 26 Mar 2026 155th Shanethegamer 🇺🇸 867 92 18ms 3 Oct 2024 155th error256 867 92 23ms 7 Oct 2024 155th thatbirdguythatuknownot 867 92 20ms 14 Oct 2024 158th JayXon 🇺🇸 865 95 445ms 4 Oct 2024 159th pardouin 🇫🇷 863 66 1,441ms 10 Apr 2025 160th xsot 🇸🇬 863 82 2ms 6 May 2025 161st tomtheisen 🇺🇸 863 83 488ms 10 Feb 2025 162nd ovs-code 🇩🇪 862 29 46ms 4 Oct 2024 163rd edsrzf 🇳🇿 862 90 104ms 18 Dec 2025 163rd snoozingnewt 🇨🇦 862 90 97ms 13 days ago 165th Natanaelel 🇸🇪 861 33 2ms 6 Oct 2024 165th GrayJoKing 🇦🇺 861 33 2ms 6 Jun 2025 165th SirBogman 🇺🇸 861 33 2ms 8 Jul 2025 168th nwellnhof 🇩🇪 860 68 10ms 5 Oct 2024 169th voytxt 🇨🇿 860 75 9ms 1 Oct 2024 169th MeWhenI 🇻🇦 860 75 14ms 2 Oct 2024 169th m-tkach 🇺🇦 860 75 13ms 5 Oct 2024 169th error256 860 75 15ms 7 Oct 2024 173rd m-tkach 🇺🇦 860 87 7ms 6 Oct 2024 174th ovs-code 🇩🇪 859 46 5ms 4 Oct 2024 174th nwellnhof 🇩🇪 859 46 4ms 7 Oct 2024 176th stefangimmillaro 859 139 337ms 3 Oct 2024 177th Bulmenisaurus 858 93 17ms 6 Oct 2024 177th lynn 858 93 17ms 8 Jan 2025 177th CornerMercury 🇬🇧 858 93 17ms 23 Nov 2025 177th KasperKivimaeki 🇫🇮 858 93 19ms 30 Nov 2025 181st marshallward 🇺🇸 858 127 45ms 22 days ago 182nd edsrzf 🇳🇿 858 143 29ms 25 days ago 183rd MostParsingVex 857 100 18ms 1 Oct 2024 184th sean-niemann 🇺🇸 856 56 37ms 8 Aug 2025 185th sean-niemann 🇺🇸 855 51 2ms 2 Oct 2024 186th JayXon 🇺🇸 854 106 1,509ms 10 days ago 187th kg583 🇺🇸 854 143 40ms 20 Feb 2026 187th edsrzf 🇳🇿 854 143 43ms 21 Mar 2026 189th error256 853 106 94ms 8 Oct 2024 190th m-tkach 🇺🇦 852 144 79ms 8 Oct 2024 191st emgordon154 851 67 1,334ms 18 Nov 2024 192nd edsrzf 🇳🇿 851 98 7ms 25 Feb 2026 193rd IanUtley 851 113 19ms 2 Oct 2024 194th sean-niemann 🇺🇸 851 114 41ms 2 Oct 2024 195th primo-ppcg 🇹🇭 851 128 41ms 27 Apr 2025 196th Lv0Sys 🇵🇱 849 76 10ms 22 Feb 2026 197th DialFrost 🇸🇬 849 94 17ms 1 Oct 2024 197th ndren 849 94 17ms 14 Feb 2025 197th anter69 🇭🇺 849 94 18ms 25 Feb 2026 200th lynn 849 131 138ms 8 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