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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 887 54 36ms 7 Oct 2024 100th nwellnhof 🇩🇪 887 54 39ms 13 Oct 2024 100th blaztoma 🇱🇹 887 54 37ms 19 days ago 104th canissimia 🇦🇶 886 66 9ms 1 Oct 2024 105th nwellnhof 🇩🇪 886 90 20ms 1 Oct 2024 105th ovs-code 🇩🇪 886 90 18ms 3 Oct 2024 105th kg583 🇺🇸 886 90 18ms 9 Oct 2024 105th sean-niemann 🇺🇸 886 90 25ms 23 Dec 2024 105th firegene 🇮🇪 886 90 16ms 19 Feb 2026 105th lukegustafson 🇺🇸 886 90 18ms 25 Feb 2026 111th acotis 884 106 151ms 29 May 2025 112th lyphyser 883 41 55ms 1 Oct 2024 113th dmrichwa 🇺🇸 883 73 12ms 5 Oct 2024 113th DialFrost 🇸🇬 883 73 11ms 12 Oct 2024 115th nwellnhof 🇩🇪 883 135 328ms 16 Oct 2024 115th edsrzf 🇳🇿 883 135 303ms 21 Feb 2026 117th GrayJoKing 🇦🇺 881 90 2ms 3 Oct 2024 117th FlyingPenguin223 881 90 2ms 16 Oct 2024 119th JayXon 🇺🇸 880 95 418ms 23 Jul 2025 120th JayXon 🇺🇸 879 79 111ms 17 Oct 2024 121st ovs-code 🇩🇪 878 69 4ms 4 Oct 2024 121st edsrzf 🇳🇿 878 69 4ms 10 Nov 2025 123rd sean-niemann 🇺🇸 878 76 2,661ms 24 Oct 2024 124th JayXon 🇺🇸 878 93 121ms 14 Oct 2024 125th 5cw 🇺🇸 877 91 17ms 1 Oct 2024 125th stefangimmillaro 877 91 22ms 13 Oct 2024 125th duckyluuk 🇳🇱 877 91 21ms 18 Oct 2024 125th GrayJoKing 🇦🇺 877 91 20ms 2 Jul 2025 129th JayXon 🇺🇸 876 84 163ms 24 May 2025 130th edsrzf 🇳🇿 875 110 7ms 21 Mar 2026 131st xsot 🇸🇬 874 66 803ms 22 Feb 2026 132nd AlephSquirrel 873 76 483ms 1 Oct 2024 133rd edsrzf 🇳🇿 873 107 798ms 20 Feb 2026 134th ovs-code 🇩🇪 873 127 127ms 2 Oct 2024 135th JayXon 🇺🇸 872 117 2ms 5 Oct 2024 136th pardouin 🇫🇷 871 55 39ms 3 Oct 2024 136th ovs-code 🇩🇪 871 55 37ms 5 Oct 2024 136th Steffan153 🇫🇮 871 55 42ms 16 Feb 2026 139th Natanaelel 🇸🇪 871 74 13ms 1 Oct 2024 139th helbling 🇨🇭 871 74 13ms 1 Oct 2024 139th Irratix 🇳🇱 871 74 13ms 14 Oct 2024 139th emgordon154 871 74 12ms 18 Nov 2024 143rd Shanethegamer 🇺🇸 871 91 2ms 4 Oct 2024 144th GrayJoKing 🇦🇺 869 87 12ms 25 Nov 2025 145th kumavale 868 108 153ms 22 days ago 146th error256 868 109 10ms 24 Jul 2025 146th edsrzf 🇳🇿 868 109 7ms 24 Jul 2025 146th zacjl 868 109 9ms 27 Mar 2026 149th emgordon154 867 77 2,598ms 8 Nov 2024 150th Shanethegamer 🇺🇸 867 92 18ms 3 Oct 2024 150th error256 867 92 23ms 7 Oct 2024 150th thatbirdguythatuknownot 867 92 20ms 14 Oct 2024 153rd kg583 🇺🇸 867 111 7ms 20 Feb 2026 154th UnderKoen 🇳🇱 865 86 7ms 4 Oct 2024 155th JayXon 🇺🇸 865 104 84ms 6 Oct 2024 156th ovs-code 🇩🇪 864 78 124ms 2 Oct 2024 157th xsot 🇸🇬 863 82 2ms 6 May 2025 158th ovs-code 🇩🇪 862 29 46ms 4 Oct 2024 159th tomtheisen 🇺🇸 862 83 488ms 10 Feb 2025 160th pardouin 🇫🇷 861 66 1,441ms 10 Apr 2025 161st edsrzf 🇳🇿 861 82 5ms 26 Mar 2026 162nd Natanaelel 🇸🇪 860 33 2ms 6 Oct 2024 162nd GrayJoKing 🇦🇺 860 33 2ms 6 Jun 2025 162nd SirBogman 🇺🇸 860 33 2ms 8 Jul 2025 165th nwellnhof 🇩🇪 860 68 10ms 5 Oct 2024 166th voytxt 🇨🇿 860 75 9ms 1 Oct 2024 166th MeWhenI 🇻🇦 860 75 14ms 2 Oct 2024 166th m-tkach 🇺🇦 860 75 13ms 5 Oct 2024 166th error256 860 75 15ms 7 Oct 2024 170th JayXon 🇺🇸 859 95 445ms 4 Oct 2024 171st ovs-code 🇩🇪 858 46 5ms 4 Oct 2024 171st nwellnhof 🇩🇪 858 46 4ms 7 Oct 2024 173rd Bulmenisaurus 858 93 17ms 6 Oct 2024 173rd lynn 858 93 17ms 8 Jan 2025 173rd CornerMercury 🇬🇧 858 93 17ms 23 Nov 2025 173rd KasperKivimaeki 🇫🇮 858 93 19ms 30 Nov 2025 177th stefangimmillaro 857 139 337ms 3 Oct 2024 178th edsrzf 🇳🇿 856 90 104ms 18 Dec 2025 178th snoozingnewt 🇨🇦 856 90 97ms 14 days ago 180th sean-niemann 🇺🇸 855 56 37ms 8 Aug 2025 181st m-tkach 🇺🇦 855 87 7ms 6 Oct 2024 182nd edsrzf 🇳🇿 854 143 29ms 26 days ago 183rd sean-niemann 🇺🇸 853 51 2ms 2 Oct 2024 184th marshallward 🇺🇸 853 127 45ms 23 days ago 185th MostParsingVex 850 100 18ms 1 Oct 2024 186th DialFrost 🇸🇬 849 94 17ms 1 Oct 2024 186th ndren 849 94 17ms 14 Feb 2025 186th anter69 🇭🇺 849 94 18ms 25 Feb 2026 189th error256 849 106 94ms 8 Oct 2024 190th kg583 🇺🇸 849 143 40ms 20 Feb 2026 190th edsrzf 🇳🇿 849 143 43ms 21 Mar 2026 192nd emgordon154 848 67 1,334ms 18 Nov 2024 193rd Lv0Sys 🇵🇱 848 76 10ms 22 Feb 2026 194th m-tkach 🇺🇦 848 144 79ms 8 Oct 2024 195th JayXon 🇺🇸 847 106 1,509ms 10 days ago 196th primo-ppcg 🇹🇭 846 128 41ms 27 Apr 2025 197th lynn 846 131 138ms 8 Jan 2025 197th edsrzf 🇳🇿 846 131 168ms 26 Mar 2026 199th KasperKivimaeki 🇫🇮 845 141 311ms 9 Oct 2025 200th error256 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