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 Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator 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 Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator 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 561st snoozingnewt 🇨🇦 662 180 295ms 2 Nov 2025 562nd 4hg 🇺🇸 661 59 34ms 5 Oct 2024 563rd error256 661 142 156ms 31 May 2025 564th BREMAUCY 🇫🇷 659 121 19ms 18 Jul 2025 564th retrohun 659 121 10ms 14 days ago 566th xyangst 658 98 9ms 15 Oct 2024 566th BambooleanLogic 🇸🇪 658 98 10ms 21 Oct 2024 568th AlephSquirrel 657 146 4ms 14 May 2025 569th Yax42 🇫🇷 655 108 2ms 11 days ago 570th jwhear 🇺🇸 655 197 1,696ms 1 Oct 2024 571st albanian-laundromat 655 291 12ms 40 hours ago 572nd chartung17 654 122 10ms 24 Mar 2025 573rd rucin93 🇵🇱 652 144 164ms 28 Oct 2024 574th Babafaba 651 102 530ms 11 Nov 2025 575th w911 651 183 281ms 7 Oct 2024 576th DialFrost 🇸🇬 648 67 2ms 22 Dec 2024 577th msbranicky 648 123 16ms 3 Oct 2024 577th bobbysq 648 123 11ms 5 Oct 2024 577th wuzekai518 648 123 10ms 8 Oct 2024 577th denkyuu1 648 123 16ms 26 days ago 577th fuzzylojik-golf 🇺🇸 648 123 17ms 9 days ago 582nd scpchicken 🇵🇼 647 61 4ms 16 hours ago 583rd CaedenHarper 🇨🇦 645 100 10ms 22 Aug 2025 583rd iczelia 🇩🇪 645 100 9ms 11 Oct 2025 583rd Yax42 🇫🇷 645 100 10ms 27 Nov 2025 586th koipondx86 645 123 2ms 8 Nov 2024 587th frankgraziano 645 128 7ms 21 Feb 2026 588th Apataras 645 145 390ms 25 Jun 2025 589th Jonatan6 🇩🇰 643 110 2ms 24 Oct 2024 590th tomh1012 643 111 500ms 8 Sep 2025 591st NotEvenIndian 643 124 10ms 22 Oct 2024 591st ridingqwerty 🇺🇸 643 124 16ms 16 Jan 2025 591st CommandLeo 🇮🇹 643 124 10ms 5 Oct 2025 591st JOrE20 643 124 17ms 21 Feb 2026 595th elgan65536 🇺🇸 643 146 159ms 2 Oct 2024 595th luuumine 🇫🇷 643 146 151ms 26 Nov 2025 597th dokutan 640 146 379ms 23 Nov 2025 598th stefangimmillaro 639 73 314ms 1 Oct 2024 599th MeWhenI 🇻🇦 638 73 7ms 3 Oct 2024 600th bnic24 638 125 16ms 3 Oct 2024 600th adoxography 638 125 11ms 22 Oct 2024 600th wh3n3v3r 🇨🇿 638 125 10ms 18 Nov 2024 600th lelbal 638 125 10ms 14 Oct 2025 604th emgordon154 636 111 4ms 12 Jan 2025 605th MeWhenI 🇻🇦 634 91 1,014ms 29 Aug 2025 606th msbranicky 634 188 301ms 7 Jan 2025 607th XenThe 🇬🇧 632 102 10ms 7 Jul 2025 607th Florian-Mt 632 102 10ms 5 Dec 2025 609th KatieLG 🇬🇧 632 105 439ms 11 Feb 2026 610th Shanethegamer 🇺🇸 631 74 324ms 16 Oct 2024 611th albanian-laundromat 631 264 1,461ms 3 Nov 2025 612th CatsAreFluffy 628 127 17ms 30 Oct 2024 612th WillowWispy 628 127 11ms 25 May 2025 614th DialFrost 🇸🇬 627 304 153ms 13 Aug 2025 615th not-a-pokemon 626 113 1ms 23 Jul 2025 616th AlephSquirrel 625 40 44ms 1 Oct 2024 617th dokutan 624 127 2ms 10 Dec 2024 618th HumanoidCPU 621 107 502ms 17 Feb 2025 619th jupj 🇫🇮 621 114 2ms 20 Jul 2025 620th BalaM314 620 104 11ms 4 Feb 2025 620th acollett89 620 104 9ms 15 Jul 2025 622nd codereport 🇨🇦 619 63 33ms 2 Oct 2024 623rd MarcMush 🇫🇷 618 91 813ms 8 Oct 2024 624th madex 🇩🇪 618 129 16ms 2 Oct 2024 624th RedzGoose 🇦🇺 618 129 11ms 15 Oct 2024 624th calebaitken 618 129 10ms 11 Apr 2025 624th rollershutter 618 129 17ms 20 Nov 2025 628th Ripick 617 135 366ms 23 Mar 2025 629th bac0id 616 141 487ms 10 Jan 2025 630th Europe2048 614 130 10ms 2 Oct 2024 630th nstearns96 🇬🇧 614 130 17ms 2 Oct 2024 630th Stockoh 🇫🇷 614 130 17ms 4 Jul 2025 633rd evnu 612 147 87ms 12 Oct 2025 634th Seanharrs 🇦🇺 610 117 478ms 15 Nov 2024 635th Shanethegamer 🇺🇸 610 154 148ms 3 Oct 2024 636th inverseLorentz 🇦🇺 609 131 11ms 7 Oct 2024 636th sciencejiho 609 131 17ms 11 Feb 2025 636th Jaydosu 609 131 11ms 11 Apr 2025 636th Emutis 🇱🇹 609 131 9ms 11 Nov 2025 640th kaascevich 609 134 124ms 9 Jul 2025 First Prev 561–640 of 933 Next Last