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 560th yokasuretsu 665 120 11ms 26 Jan 2025 560th Troon 665 120 10ms 17 Feb 2025 560th keelimeguy 🇺🇸 665 120 19ms 14 Jun 2025 564th yeminghan2021 664 131 65ms 3 Feb 2026 565th AlephSquirrel 664 146 4ms 14 May 2025 566th snoozingnewt 🇨🇦 663 180 338ms 2 Nov 2025 567th 4hg 🇺🇸 662 59 34ms 5 Oct 2024 568th error256 661 142 156ms 31 May 2025 569th albanian-laundromat 🇺🇸 661 291 12ms 12 days ago 570th BREMAUCY 🇫🇷 659 121 17ms 18 Jul 2025 570th retrohun 659 121 10ms 26 days ago 572nd xyangst 658 98 10ms 15 Oct 2024 572nd BambooleanLogic 🇸🇪 658 98 10ms 21 Oct 2024 574th Yax42 🇫🇷 655 108 2ms 23 days ago 575th chartung17 654 122 10ms 24 Mar 2025 576th w911 653 183 327ms 7 Oct 2024 577th Babafaba 652 102 515ms 11 Nov 2025 577th flekAI 652 102 462ms 4 days ago 577th jusaka 652 102 465ms 12 hours ago 580th frankgraziano 652 128 7ms 21 Feb 2026 581st rucin93 🇵🇱 652 144 156ms 28 Oct 2024 582nd DialFrost 🇸🇬 650 67 2ms 22 Dec 2024 583rd msbranicky 649 123 17ms 3 Oct 2024 583rd bobbysq 649 123 12ms 5 Oct 2024 583rd wuzekai518 649 123 10ms 8 Oct 2024 583rd denkyuu1 649 123 18ms 10 Mar 2026 583rd fuzzylojik-golf 🇺🇸 649 123 17ms 20 days ago 588th scpchicken 🇵🇼 648 61 4ms 11 days ago 589th koipondx86 646 123 2ms 8 Nov 2024 590th CaedenHarper 🇨🇦 645 100 13ms 22 Aug 2025 590th iczelia 🇩🇪 645 100 10ms 11 Oct 2025 590th Yax42 🇫🇷 645 100 12ms 27 Nov 2025 593rd Apataras 645 145 390ms 25 Jun 2025 594th tomh1012 644 111 529ms 8 Sep 2025 595th Jonatan6 🇩🇰 643 110 2ms 24 Oct 2024 596th NotEvenIndian 643 124 14ms 22 Oct 2024 596th ridingqwerty 🇺🇸 643 124 20ms 16 Jan 2025 596th CommandLeo 🇮🇹 643 124 11ms 5 Oct 2025 596th JOrE20 643 124 18ms 21 Feb 2026 600th elgan65536 🇺🇸 643 146 159ms 2 Oct 2024 600th luuumine 🇫🇷 643 146 151ms 26 Nov 2025 602nd stefangimmillaro 641 73 304ms 1 Oct 2024 603rd emgordon154 641 111 4ms 12 Jan 2025 604th dokutan 640 146 379ms 23 Nov 2025 605th MeWhenI 🇻🇦 638 73 7ms 3 Oct 2024 606th bnic24 638 125 18ms 3 Oct 2024 606th adoxography 638 125 10ms 22 Oct 2024 606th wh3n3v3r 🇨🇿 638 125 11ms 18 Nov 2024 606th lelbal 638 125 10ms 14 Oct 2025 610th MeWhenI 🇻🇦 635 91 1,014ms 29 Aug 2025 611th msbranicky 635 188 328ms 7 Jan 2025 612th KatieLG 🇬🇧 633 105 635ms 11 Feb 2026 613th DialFrost 🇸🇬 633 304 153ms 13 Aug 2025 614th Shanethegamer 🇺🇸 632 74 319ms 16 Oct 2024 615th XenThe 🇬🇧 632 102 9ms 7 Jul 2025 615th Florian-Mt 632 102 10ms 5 Dec 2025 617th CatsAreFluffy 628 127 17ms 30 Oct 2024 617th WillowWispy 628 127 11ms 25 May 2025 619th not-a-pokemon 626 113 1ms 23 Jul 2025 620th dokutan 626 127 2ms 10 Dec 2024 621st AlephSquirrel 625 40 43ms 1 Oct 2024 622nd HumanoidCPU 621 107 486ms 17 Feb 2025 623rd jupj 🇫🇮 621 114 2ms 20 Jul 2025 624th codereport 🇨🇦 620 63 33ms 2 Oct 2024 625th MarcMush 🇫🇷 620 91 830ms 8 Oct 2024 626th BalaM314 620 104 11ms 4 Feb 2025 626th acollett89 620 104 11ms 15 Jul 2025 628th Ripick 620 135 366ms 23 Mar 2025 629th madex 🇩🇪 618 129 21ms 2 Oct 2024 629th RedzGoose 🇦🇺 618 129 11ms 15 Oct 2024 629th calebaitken 618 129 10ms 11 Apr 2025 629th rollershutter 618 129 19ms 20 Nov 2025 633rd bac0id 617 141 461ms 10 Jan 2025 634th evnu 615 147 87ms 12 Oct 2025 635th Europe2048 614 130 11ms 2 Oct 2024 635th nstearns96 🇬🇧 614 130 17ms 2 Oct 2024 635th Stockoh 🇫🇷 614 130 17ms 4 Jul 2025 638th MeWhenI 🇻🇦 612 111 89ms 2 Oct 2024 639th kaascevich 612 134 124ms 9 Jul 2025 640th Seanharrs 🇦🇺 611 117 539ms 15 Nov 2024 First Prev 561–640 of 1,003 Next Last