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 LordSir101 665 97 10ms 10 Aug 2025 562nd TaserTheFox 🇺🇸 665 120 18ms 8 Oct 2024 562nd yokasuretsu 665 120 11ms 26 Jan 2025 562nd Troon 665 120 10ms 17 Feb 2025 562nd keelimeguy 🇺🇸 665 120 19ms 14 Jun 2025 566th yeminghan2021 663 131 65ms 3 Feb 2026 567th snoozingnewt 🇨🇦 662 180 338ms 2 Nov 2025 568th 4hg 🇺🇸 661 59 34ms 5 Oct 2024 569th error256 661 142 156ms 31 May 2025 570th BREMAUCY 🇫🇷 659 121 17ms 18 Jul 2025 570th retrohun 659 121 10ms 22 days ago 572nd xyangst 658 98 11ms 15 Oct 2024 572nd BambooleanLogic 🇸🇪 658 98 12ms 21 Oct 2024 574th AlephSquirrel 657 146 4ms 14 May 2025 575th Yax42 🇫🇷 655 108 2ms 19 days ago 576th jwhear 🇺🇸 655 197 1,696ms 1 Oct 2024 577th albanian-laundromat 🇺🇸 655 291 12ms 8 days ago 578th chartung17 654 122 10ms 24 Mar 2025 579th rucin93 🇵🇱 652 144 156ms 28 Oct 2024 580th Babafaba 651 102 515ms 11 Nov 2025 580th flekAI 651 102 462ms 5 hours ago 582nd w911 651 183 327ms 7 Oct 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 16 days ago 588th DialFrost 🇸🇬 648 67 2ms 22 Dec 2024 589th scpchicken 🇵🇼 647 61 4ms 7 days ago 590th CaedenHarper 🇨🇦 645 100 10ms 22 Aug 2025 590th iczelia 🇩🇪 645 100 10ms 11 Oct 2025 590th Yax42 🇫🇷 645 100 10ms 27 Nov 2025 593rd koipondx86 645 123 2ms 8 Nov 2024 594th frankgraziano 645 128 7ms 21 Feb 2026 595th Apataras 644 145 390ms 25 Jun 2025 596th Jonatan6 🇩🇰 643 110 2ms 24 Oct 2024 597th tomh1012 643 111 442ms 8 Sep 2025 598th NotEvenIndian 643 124 14ms 22 Oct 2024 598th ridingqwerty 🇺🇸 643 124 20ms 16 Jan 2025 598th CommandLeo 🇮🇹 643 124 11ms 5 Oct 2025 598th JOrE20 643 124 18ms 21 Feb 2026 602nd elgan65536 🇺🇸 643 146 159ms 2 Oct 2024 602nd luuumine 🇫🇷 643 146 151ms 26 Nov 2025 604th dokutan 640 146 379ms 23 Nov 2025 605th stefangimmillaro 639 73 253ms 1 Oct 2024 606th MeWhenI 🇻🇦 638 73 7ms 3 Oct 2024 607th bnic24 638 125 18ms 3 Oct 2024 607th adoxography 638 125 10ms 22 Oct 2024 607th wh3n3v3r 🇨🇿 638 125 11ms 18 Nov 2024 607th lelbal 638 125 10ms 14 Oct 2025 611th emgordon154 636 111 4ms 12 Jan 2025 612th MeWhenI 🇻🇦 634 91 1,014ms 29 Aug 2025 613th msbranicky 634 188 328ms 7 Jan 2025 614th XenThe 🇬🇧 632 102 10ms 7 Jul 2025 614th Florian-Mt 632 102 10ms 5 Dec 2025 616th KatieLG 🇬🇧 632 105 635ms 11 Feb 2026 617th Shanethegamer 🇺🇸 631 74 231ms 16 Oct 2024 618th CatsAreFluffy 628 127 17ms 30 Oct 2024 618th WillowWispy 628 127 11ms 25 May 2025 620th DialFrost 🇸🇬 627 304 153ms 13 Aug 2025 621st not-a-pokemon 626 113 1ms 23 Jul 2025 622nd AlephSquirrel 625 40 43ms 1 Oct 2024 623rd dokutan 624 127 2ms 10 Dec 2024 624th HumanoidCPU 621 107 486ms 17 Feb 2025 625th BalaM314 620 104 12ms 4 Feb 2025 625th acollett89 620 104 11ms 15 Jul 2025 627th jupj 🇫🇮 620 114 2ms 20 Jul 2025 628th codereport 🇨🇦 619 63 33ms 2 Oct 2024 629th MarcMush 🇫🇷 618 91 844ms 8 Oct 2024 630th madex 🇩🇪 618 129 21ms 2 Oct 2024 630th RedzGoose 🇦🇺 618 129 11ms 15 Oct 2024 630th calebaitken 618 129 10ms 11 Apr 2025 630th rollershutter 618 129 19ms 20 Nov 2025 634th Ripick 617 135 366ms 23 Mar 2025 635th bac0id 616 141 461ms 10 Jan 2025 636th Europe2048 614 130 11ms 2 Oct 2024 636th nstearns96 🇬🇧 614 130 17ms 2 Oct 2024 636th Stockoh 🇫🇷 614 130 17ms 4 Jul 2025 639th evnu 612 147 87ms 12 Oct 2025 640th Seanharrs 🇦🇺 610 117 434ms 15 Nov 2024 First Prev 561–640 of 936 Next Last