Card Number Validation in all languages in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 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 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 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 Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 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 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 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 Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 76th edsrzf 🇳🇿 889 89 2ms 30 Aug 2025 77th MeWhenI 🇻🇦 888 64 946ms 3 Oct 2024 78th JayXon 🇺🇸 888 134 270ms 3 Oct 2024 79th kgolf 887 32 3ms 15 Apr 2025 80th canissimia 🇦🇶 886 66 9ms 1 Oct 2024 81st JayXon 🇺🇸 886 79 2ms 5 Oct 2024 81st rucin93 🇵🇱 886 79 3ms 24 Oct 2024 81st sean-niemann 🇺🇸 886 79 2ms 3 Nov 2024 84th nwellnhof 🇩🇪 885 90 93ms 1 Oct 2024 84th ovs-code 🇩🇪 885 90 22ms 3 Oct 2024 84th kg583 🇺🇸 885 90 17ms 9 Oct 2024 84th sean-niemann 🇺🇸 885 90 28ms 23 Dec 2024 84th ryyyn 🇺🇸 885 90 20ms 26 Jul 2025 89th MeWhenI 🇻🇦 884 54 38ms 3 Oct 2024 89th error256 884 54 42ms 7 Oct 2024 89th nwellnhof 🇩🇪 884 54 48ms 13 Oct 2024 92nd error256 884 68 1,057ms 2 May 2025 93rd nwellnhof 🇩🇪 884 105 436ms 25 Sep 2025 94th dmrichwa 🇺🇸 881 73 10ms 5 Oct 2024 94th DialFrost 🇸🇬 881 73 10ms 12 Oct 2024 96th nwellnhof 🇩🇪 881 135 314ms 16 Oct 2024 97th GrayJoKing 🇦🇺 880 90 2ms 3 Oct 2024 97th FlyingPenguin223 880 90 2ms 16 Oct 2024 99th lyphyser 879 41 91ms 1 Oct 2024 100th acotis 878 106 146ms 29 May 2025 101st JayXon 🇺🇸 877 95 365ms 23 Jul 2025 102nd rhdqor213 876 80 2ms 2 Oct 2024 102nd KasperKivimaeki 🇫🇮 876 80 2ms 16 Oct 2024 104th JayXon 🇺🇸 875 79 105ms 17 Oct 2024 105th edsrzf 🇳🇿 875 80 2ms 26 Jul 2025 106th 5cw 🇺🇸 875 91 15ms 1 Oct 2024 106th stefangimmillaro 875 91 22ms 13 Oct 2024 106th duckyluuk 🇳🇱 875 91 23ms 18 Oct 2024 106th GrayJoKing 🇦🇺 875 91 20ms 2 Jul 2025 110th JayXon 🇺🇸 875 93 128ms 14 Oct 2024 111th sean-niemann 🇺🇸 874 76 4,090ms 24 Oct 2024 112th edsrzf 🇳🇿 873 115 15ms 24 Jul 2025 113th ovs-code 🇩🇪 872 69 4ms 4 Oct 2024 114th JayXon 🇺🇸 871 84 108ms 24 May 2025 115th AlephSquirrel 870 76 539ms 1 Oct 2024 116th Shanethegamer 🇺🇸 870 91 2ms 4 Oct 2024 117th ovs-code 🇩🇪 870 127 164ms 2 Oct 2024 118th Natanaelel 🇸🇪 869 74 12ms 1 Oct 2024 118th helbling 🇨🇭 869 74 12ms 1 Oct 2024 118th Irratix 🇳🇱 869 74 10ms 14 Oct 2024 118th emgordon154 869 74 13ms 18 Nov 2024 122nd JayXon 🇺🇸 869 117 2ms 5 Oct 2024 123rd pardouin 🇫🇷 868 55 42ms 3 Oct 2024 123rd ovs-code 🇩🇪 868 55 39ms 5 Oct 2024 125th error256 868 109 10ms 24 Jul 2025 125th edsrzf 🇳🇿 868 109 8ms 24 Jul 2025 127th sean-niemann 🇺🇸 866 51 3ms 2 Oct 2024 128th UnderKoen 🇳🇱 865 86 5ms 4 Oct 2024 129th Shanethegamer 🇺🇸 865 92 18ms 3 Oct 2024 129th error256 865 92 26ms 7 Oct 2024 129th thatbirdguythatuknownot 865 92 17ms 14 Oct 2024 132nd ovs-code 🇩🇪 864 78 97ms 2 Oct 2024 133rd emgordon154 863 77 3,355ms 8 Nov 2024 134th ovs-code 🇩🇪 862 29 45ms 4 Oct 2024 135th pardouin 🇫🇷 861 66 1,028ms 10 Apr 2025 136th JayXon 🇺🇸 861 104 297ms 6 Oct 2024 137th Natanaelel 🇸🇪 860 33 3ms 6 Oct 2024 137th GrayJoKing 🇦🇺 860 33 3ms 6 Jun 2025 137th SirBogman 🇺🇸 860 33 2ms 8 Jul 2025 140th nwellnhof 🇩🇪 860 68 10ms 5 Oct 2024 141st zacjl 860 110 10ms 10 Oct 2024 142nd voytxt 🇨🇿 858 75 10ms 1 Oct 2024 142nd MeWhenI 🇻🇦 858 75 13ms 2 Oct 2024 142nd m-tkach 🇺🇦 858 75 10ms 5 Oct 2024 142nd error256 858 75 12ms 7 Oct 2024 146th tomtheisen 🇺🇸 858 83 385ms 10 Feb 2025 147th Bulmenisaurus 856 93 19ms 6 Oct 2024 147th lynn 856 93 17ms 8 Jan 2025 149th stefangimmillaro 856 139 291ms 3 Oct 2024 149th edsrzf 🇳🇿 856 139 291ms 23 Jul 2025 First Prev 76–150 of 807 Next Last