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 error256 660 142 156ms 31 May 2025 562nd BREMAUCY 🇫🇷 659 121 19ms 18 Jul 2025 562nd retrohun 659 121 10ms 13 days ago 564th xyangst 658 98 9ms 15 Oct 2024 564th BambooleanLogic 🇸🇪 658 98 10ms 21 Oct 2024 566th AlephSquirrel 657 146 4ms 14 May 2025 567th Yax42 🇫🇷 655 108 2ms 10 days ago 568th jwhear 🇺🇸 655 197 1,696ms 1 Oct 2024 569th albanian-laundromat 655 291 12ms 14 hours ago 570th chartung17 654 122 10ms 24 Mar 2025 571st Babafaba 651 102 530ms 11 Nov 2025 572nd rucin93 🇵🇱 651 144 164ms 28 Oct 2024 573rd w911 651 183 281ms 7 Oct 2024 574th DialFrost 🇸🇬 648 67 2ms 22 Dec 2024 575th msbranicky 648 123 16ms 3 Oct 2024 575th bobbysq 648 123 11ms 5 Oct 2024 575th wuzekai518 648 123 10ms 8 Oct 2024 575th denkyuu1 648 123 16ms 25 days ago 575th fuzzylojik-golf 🇺🇸 648 123 17ms 7 days ago 580th CaedenHarper 🇨🇦 645 100 10ms 22 Aug 2025 580th iczelia 🇩🇪 645 100 9ms 11 Oct 2025 580th Yax42 🇫🇷 645 100 10ms 27 Nov 2025 583rd koipondx86 645 123 2ms 8 Nov 2024 584th frankgraziano 645 128 7ms 21 Feb 2026 585th Apataras 645 145 390ms 25 Jun 2025 586th Jonatan6 🇩🇰 643 110 2ms 24 Oct 2024 587th tomh1012 643 111 500ms 8 Sep 2025 588th NotEvenIndian 643 124 10ms 22 Oct 2024 588th ridingqwerty 🇺🇸 643 124 16ms 16 Jan 2025 588th CommandLeo 🇮🇹 643 124 10ms 5 Oct 2025 588th JOrE20 643 124 17ms 21 Feb 2026 592nd elgan65536 🇺🇸 642 146 159ms 2 Oct 2024 592nd luuumine 🇫🇷 642 146 151ms 26 Nov 2025 594th dokutan 640 146 379ms 23 Nov 2025 595th stefangimmillaro 639 73 314ms 1 Oct 2024 596th MeWhenI 🇻🇦 638 73 7ms 3 Oct 2024 597th bnic24 638 125 16ms 3 Oct 2024 597th adoxography 638 125 11ms 22 Oct 2024 597th wh3n3v3r 🇨🇿 638 125 10ms 18 Nov 2024 597th lelbal 638 125 10ms 14 Oct 2025 601st emgordon154 636 111 4ms 12 Jan 2025 602nd MeWhenI 🇻🇦 634 91 1,014ms 29 Aug 2025 603rd msbranicky 634 188 301ms 7 Jan 2025 604th XenThe 🇬🇧 632 102 10ms 7 Jul 2025 604th Florian-Mt 632 102 10ms 5 Dec 2025 606th KatieLG 🇬🇧 632 105 439ms 11 Feb 2026 607th Shanethegamer 🇺🇸 631 74 324ms 16 Oct 2024 608th albanian-laundromat 631 264 1,461ms 3 Nov 2025 609th CatsAreFluffy 628 127 17ms 30 Oct 2024 609th WillowWispy 628 127 11ms 25 May 2025 611th DialFrost 🇸🇬 627 304 153ms 13 Aug 2025 612th not-a-pokemon 626 113 1ms 23 Jul 2025 613th AlephSquirrel 625 40 44ms 1 Oct 2024 614th dokutan 624 127 2ms 10 Dec 2024 615th HumanoidCPU 621 107 502ms 17 Feb 2025 616th jupj 🇫🇮 621 114 2ms 20 Jul 2025 617th BalaM314 620 104 11ms 4 Feb 2025 617th acollett89 620 104 9ms 15 Jul 2025 619th codereport 🇨🇦 619 63 33ms 2 Oct 2024 620th MarcMush 🇫🇷 618 91 813ms 8 Oct 2024 621st madex 🇩🇪 618 129 16ms 2 Oct 2024 621st RedzGoose 🇦🇺 618 129 11ms 15 Oct 2024 621st calebaitken 618 129 10ms 11 Apr 2025 621st rollershutter 618 129 17ms 20 Nov 2025 625th Ripick 617 135 366ms 23 Mar 2025 626th bac0id 616 141 487ms 10 Jan 2025 627th Europe2048 614 130 10ms 2 Oct 2024 627th nstearns96 🇬🇧 614 130 17ms 2 Oct 2024 627th Stockoh 🇫🇷 614 130 17ms 4 Jul 2025 630th evnu 612 147 87ms 12 Oct 2025 631st Seanharrs 🇦🇺 610 117 478ms 15 Nov 2024 632nd inverseLorentz 🇦🇺 609 131 11ms 7 Oct 2024 632nd sciencejiho 609 131 17ms 11 Feb 2025 632nd Jaydosu 609 131 11ms 11 Apr 2025 632nd Emutis 🇱🇹 609 131 9ms 11 Nov 2025 636th kaascevich 609 134 124ms 9 Jul 2025 637th Shanethegamer 🇺🇸 609 154 148ms 3 Oct 2024 638th HumanoidCPU 608 106 12ms 7 Mar 2025 638th daveberlin 608 106 10ms 27 Jun 2025 640th MeWhenI 🇻🇦 607 111 89ms 2 Oct 2024 First Prev 561–640 of 930 Next Last