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 ><> 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 ALGOL 68 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 ><> 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 ALGOL 68 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 241st MeWhenI 🇻🇦 817 85 127ms 4 Oct 2024 242nd MeWhenI 🇻🇦 817 92 10ms 24 Dec 2024 243rd MeWhenI 🇻🇦 817 104 1,025ms 2 Oct 2024 244th canissimia 🇦🇶 817 130 3ms 4 Oct 2024 245th MeWhenI 🇻🇦 817 186 14ms 2 Oct 2024 246th sisyphus-ppcg 🇦🇺 816 83 10ms 2 Oct 2024 247th MeWhenI 🇻🇦 816 85 2ms 5 Oct 2024 248th CLOStrophobic 🇮🇹 815 119 6ms 24 Feb 2025 249th lifthrasiir 🇰🇷 815 197 9ms 19 Dec 2024 250th Shanethegamer 🇺🇸 814 69 324ms 2 Oct 2024 251st GolfingSuccess 🇬🇷 813 98 17ms 5 Oct 2024 251st albanian-laundromat 813 98 17ms 3 Nov 2025 253rd albanian-laundromat 813 118 4ms 11 Dec 2025 254th emgordon154 813 205 1,404ms 7 Mar 2025 255th Shanethegamer 🇺🇸 812 70 1,296ms 9 Apr 2025 256th sean-niemann 🇺🇸 812 115 361ms 24 Sep 2025 256th stefangimmillaro 812 115 671ms 6 Oct 2025 258th Natanaelel 🇸🇪 811 59 35ms 7 Feb 2025 259th stefangimmillaro 810 126 2ms 3 Oct 2024 260th sean-niemann 🇺🇸 809 82 393ms 23 Dec 2024 261st stefangimmillaro 808 134 41ms 3 Oct 2024 262nd GolfingSuccess 🇬🇷 806 31 72ms 5 Oct 2024 263rd trinityy-7 805 80 10ms 23 Jul 2025 264th SirBogman 🇺🇸 805 99 16ms 8 Oct 2024 265th error256 805 116 494ms 24 Sep 2025 266th albanian-laundromat 805 148 281ms 3 Dec 2025 267th MeWhenI 🇻🇦 804 127 2ms 5 Oct 2024 267th albanian-laundromat 804 127 3ms 3 Nov 2025 269th GrayJoKing 🇦🇺 803 58 6ms 24 Oct 2024 270th MeWhenI 🇻🇦 803 88 1ms 2 Oct 2024 271st Shanethegamer 🇺🇸 803 138 142ms 3 Oct 2024 272nd antimon2 🇯🇵 802 70 531ms 9 Oct 2024 273rd stefangimmillaro 802 89 453ms 4 Oct 2024 274th DialFrost 🇸🇬 802 106 24ms 23 Mar 2025 275th ovs-code 🇩🇪 802 119 16ms 1 Oct 2024 276th albanian-laundromat 802 120 42ms 3 Nov 2025 277th Shanethegamer 🇺🇸 801 208 1,404ms 14 Apr 2025 277th DialFrost 🇸🇬 801 208 1,411ms 18 Apr 2025 279th duckyluuk 🇳🇱 799 83 458ms 3 Oct 2024 279th emgordon154 799 83 434ms 18 Nov 2024 281st sean-niemann 🇺🇸 799 92 116ms 1 Oct 2025 282nd stefangimmillaro 798 87 113ms 4 Oct 2024 283rd DialFrost 🇸🇬 797 85 7ms 1 Oct 2024 283rd xsot 🇸🇬 797 85 5ms 7 Oct 2024 285th anter69 🇭🇺 797 100 17ms 1 Oct 2024 285th bzijlema 🇳🇱 797 100 18ms 10 Oct 2024 285th bricknellj 797 100 17ms 4 Mar 2025 288th MeWhenI 🇻🇦 797 109 389ms 2 Oct 2024 289th Shanethegamer 🇺🇸 797 128 2ms 3 Oct 2024 290th 2bular 796 49 31ms 8 Nov 2025 291st m-tkach 🇺🇦 796 138 29ms 3 Oct 2024 292nd tayloia 🇬🇧 795 81 11ms 3 Oct 2024 292nd targrik 795 81 9ms 8 Feb 2025 292nd Lv0Sys 🇵🇱 795 81 10ms 10 Dec 2025 295th DialFrost 🇸🇬 794 84 2,408ms 26 Oct 2024 296th Shanethegamer 🇺🇸 794 102 451ms 4 Oct 2024 297th MeWhenI 🇻🇦 793 90 438ms 2 Oct 2024 298th Natanaelel 🇸🇪 791 48 118ms 1 Oct 2024 299th jared-hughes 791 203 88ms 20 Dec 2024 300th saito-ta 🇯🇵 790 74 7ms 1 Oct 2024 301st ovs-code 🇩🇪 790 84 458ms 3 Oct 2024 301st Shanethegamer 🇺🇸 790 84 451ms 3 Oct 2024 303rd pardouin 🇫🇷 789 81 139ms 29 Jan 2025 303rd ovs-code 🇩🇪 789 81 126ms 17 Apr 2025 305th Shanethegamer 🇺🇸 789 88 113ms 4 Oct 2024 306th lifthrasiir 🇰🇷 789 101 16ms 21 Nov 2024 306th btjones0 789 101 17ms 2 Dec 2024 308th MeWhenI 🇻🇦 789 122 39ms 5 Oct 2024 309th emgordon154 789 151 286ms 17 Jan 2025 310th emgordon154 787 164 1,815ms 22 Dec 2025 311th KingSkyrock 🇺🇸 785 82 10ms 14 Oct 2024 312th namelessiw 785 119 565ms 9 Oct 2025 313th SirBogman 🇺🇸 785 138 39ms 11 Jul 2025 314th stefangimmillaro 784 61 35ms 1 Oct 2024 315th Shanethegamer 🇺🇸 784 91 455ms 3 Oct 2024 316th edsrzf 🇳🇿 784 119 153ms 23 Jul 2025 317th Shanethegamer 🇺🇸 784 152 281ms 3 Oct 2024 317th targrik 784 152 283ms 7 Jul 2025 319th AlephSquirrel 783 124 7ms 21 Oct 2024 320th annaproxy 782 102 17ms 1 Oct 2024 First Prev 241–320 of 895 Next Last