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 240th firegene 🇮🇪 813 98 16ms 21 Oct 2024 240th albanian-laundromat 813 98 17ms 3 Nov 2025 243rd albanian-laundromat 813 118 4ms 11 Dec 2025 244th emgordon154 813 205 1,406ms 7 Mar 2025 245th Shanethegamer 🇺🇸 812 70 1,296ms 9 Apr 2025 246th sean-niemann 🇺🇸 812 115 361ms 24 Sep 2025 246th stefangimmillaro 812 115 671ms 6 Oct 2025 248th Natanaelel 🇸🇪 811 59 36ms 7 Feb 2025 249th kg583 🇺🇸 808 82 515ms 1 Oct 2024 249th sean-niemann 🇺🇸 808 82 530ms 23 Dec 2024 251st stefangimmillaro 808 134 41ms 3 Oct 2024 252nd stefangimmillaro 807 126 2ms 3 Oct 2024 253rd GolfingSuccess 🇬🇷 806 31 74ms 5 Oct 2024 254th trinityy-7 805 80 10ms 23 Jul 2025 255th SirBogman 🇺🇸 805 99 16ms 8 Oct 2024 256th error256 805 116 494ms 24 Sep 2025 257th albanian-laundromat 805 148 281ms 3 Dec 2025 258th GrayJoKing 🇦🇺 803 58 6ms 24 Oct 2024 259th MeWhenI 🇻🇦 803 88 1ms 2 Oct 2024 260th Shanethegamer 🇺🇸 803 138 142ms 3 Oct 2024 261st antimon2 🇯🇵 802 70 536ms 9 Oct 2024 262nd stefangimmillaro 802 89 453ms 4 Oct 2024 263rd DialFrost 🇸🇬 802 106 24ms 23 Mar 2025 264th ovs-code 🇩🇪 802 119 14ms 1 Oct 2024 265th albanian-laundromat 802 120 42ms 3 Nov 2025 266th MeWhenI 🇻🇦 801 127 2ms 5 Oct 2024 266th albanian-laundromat 801 127 3ms 3 Nov 2025 268th Shanethegamer 🇺🇸 801 208 1,415ms 14 Apr 2025 268th DialFrost 🇸🇬 801 208 1,422ms 18 Apr 2025 270th sean-niemann 🇺🇸 799 92 116ms 1 Oct 2025 271st duckyluuk 🇳🇱 798 83 458ms 3 Oct 2024 271st emgordon154 798 83 434ms 18 Nov 2024 273rd albanian-laundromat 797 74 1,047ms 3 Nov 2025 274th DialFrost 🇸🇬 797 85 7ms 1 Oct 2024 274th xsot 🇸🇬 797 85 4ms 7 Oct 2024 276th anter69 🇭🇺 797 100 17ms 1 Oct 2024 276th bzijlema 🇳🇱 797 100 18ms 10 Oct 2024 276th bricknellj 797 100 17ms 4 Mar 2025 279th MeWhenI 🇻🇦 797 109 389ms 2 Oct 2024 280th 2bular 796 49 31ms 8 Nov 2025 281st kg583 🇺🇸 796 124 7ms 20 Oct 2024 281st AlephSquirrel 796 124 7ms 21 Oct 2024 283rd m-tkach 🇺🇦 796 138 27ms 3 Oct 2024 284th tayloia 🇬🇧 795 81 10ms 3 Oct 2024 284th targrik 795 81 10ms 8 Feb 2025 284th Lv0Sys 🇵🇱 795 81 9ms 10 Dec 2025 287th DialFrost 🇸🇬 794 84 2,408ms 26 Oct 2024 288th stefangimmillaro 794 87 110ms 4 Oct 2024 289th Shanethegamer 🇺🇸 794 102 384ms 4 Oct 2024 290th Shanethegamer 🇺🇸 794 128 2ms 3 Oct 2024 291st kg583 🇺🇸 794 160 41ms 13 Feb 2025 291st CLOStrophobic 🇮🇹 794 160 40ms 27 Feb 2025 293rd MeWhenI 🇻🇦 793 90 461ms 2 Oct 2024 294th Natanaelel 🇸🇪 791 48 118ms 1 Oct 2024 295th jared-hughes 791 203 101ms 20 Dec 2024 296th saito-ta 🇯🇵 790 74 7ms 1 Oct 2024 297th xsot 🇸🇬 790 125 7ms 20 Oct 2024 298th pardouin 🇫🇷 789 81 139ms 29 Jan 2025 298th ovs-code 🇩🇪 789 81 126ms 17 Apr 2025 300th ovs-code 🇩🇪 789 84 458ms 3 Oct 2024 300th Shanethegamer 🇺🇸 789 84 451ms 3 Oct 2024 302nd lifthrasiir 🇰🇷 789 101 17ms 21 Nov 2024 302nd btjones0 789 101 18ms 2 Dec 2024 304th MeWhenI 🇻🇦 789 122 39ms 5 Oct 2024 305th emgordon154 789 151 286ms 17 Jan 2025 306th emgordon154 787 164 1,815ms 22 Dec 2025 307th KingSkyrock 🇺🇸 785 82 11ms 14 Oct 2024 308th Shanethegamer 🇺🇸 785 88 122ms 4 Oct 2024 309th kg583 🇺🇸 785 94 4ms 13 Nov 2025 310th namelessiw 785 119 565ms 9 Oct 2025 311th SirBogman 🇺🇸 785 138 39ms 11 Jul 2025 312th stefangimmillaro 784 61 35ms 1 Oct 2024 313th Shanethegamer 🇺🇸 784 91 455ms 3 Oct 2024 314th edsrzf 🇳🇿 784 119 142ms 23 Jul 2025 315th Shanethegamer 🇺🇸 784 152 281ms 3 Oct 2024 315th targrik 784 152 283ms 7 Jul 2025 317th annaproxy 782 102 17ms 1 Oct 2024 317th snoozingnewt 🇨🇦 782 102 10ms 6 Dec 2025 317th solisolu 782 102 10ms 31 Dec 2025 320th SirBogman 🇺🇸 780 50 34ms 8 Jul 2025 First Prev 241–320 of 888 Next Last