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 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 Multitap Input 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 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 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 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 Multitap Input 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 561st msbranicky 634 188 252ms 7 Jan 2025 562nd Shanethegamer 🇺🇸 631 74 287ms 16 Oct 2024 563rd XenThe 🇬🇧 631 102 10ms 7 Jul 2025 563rd Florian-Mt 631 102 9ms 5 Dec 2025 565th albanian-laundromat 631 264 1,421ms 3 Nov 2025 566th CatsAreFluffy 627 127 15ms 30 Oct 2024 566th WillowWispy 627 127 10ms 25 May 2025 568th DialFrost 🇸🇬 627 304 153ms 13 Aug 2025 569th AlephSquirrel 625 40 43ms 1 Oct 2024 570th not-a-pokemon 623 113 2ms 23 Jul 2025 571st dokutan 623 127 2ms 10 Dec 2024 572nd codereport 🇨🇦 619 63 33ms 2 Oct 2024 573rd BalaM314 619 104 9ms 4 Feb 2025 573rd acollett89 619 104 10ms 15 Jul 2025 575th HumanoidCPU 619 107 475ms 17 Feb 2025 576th jupj 🇫🇮 618 114 2ms 20 Jul 2025 577th madex 🇩🇪 618 129 16ms 2 Oct 2024 577th RedzGoose 🇦🇺 618 129 13ms 15 Oct 2024 577th calebaitken 618 129 9ms 11 Apr 2025 577th rollershutter 618 129 17ms 20 Nov 2025 577th JOrE20 🇺🇸 618 129 17ms 1 Dec 2025 582nd MarcMush 🇫🇷 617 91 764ms 8 Oct 2024 583rd Ripick 617 135 346ms 23 Mar 2025 584th Europe2048 613 130 9ms 2 Oct 2024 584th nstearns96 🇬🇧 613 130 16ms 2 Oct 2024 584th Stockoh 🇫🇷 613 130 16ms 4 Jul 2025 587th bac0id 612 141 405ms 10 Jan 2025 588th evnu 612 147 86ms 12 Oct 2025 589th Seanharrs 610 117 471ms 15 Nov 2024 590th kaascevich 609 134 121ms 9 Jul 2025 591st inverseLorentz 🇦🇺 608 131 9ms 7 Oct 2024 591st dokutan 608 131 10ms 19 Oct 2024 591st sciencejiho 608 131 16ms 11 Feb 2025 591st Jaydosu 608 131 9ms 11 Apr 2025 591st Emutis 🇱🇹 608 131 9ms 11 Nov 2025 596th HumanoidCPU 607 106 10ms 7 Mar 2025 596th daveberlin 607 106 9ms 27 Jun 2025 598th MeWhenI 🇻🇦 607 111 88ms 2 Oct 2024 599th Shanethegamer 🇺🇸 606 154 145ms 3 Oct 2024 600th emgordon154 606 156 8ms 13 Dec 2024 601st MeWhenI 🇻🇦 605 73 2ms 2 Oct 2024 602nd alemelis 604 93 448ms 1 Oct 2024 603rd roguh 🇬🇹 602 117 1ms 13 Oct 2024 603rd iczelia 🇩🇪 602 117 2ms 25 Sep 2025 605th Mabeloid 🇳🇴 599 133 9ms 2 Oct 2024 606th MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 607th dokutan 596 116 2ms 19 Nov 2025 608th arcpolaris 595 120 396ms 28 Jan 2025 609th dokutan 595 159 7ms 19 Oct 2024 610th SirBogman 🇺🇸 593 64 122ms 11 Jul 2025 611th bac0id 592 119 2ms 10 Jan 2025 612th tatzyr 🇯🇵 590 81 37ms 23 Dec 2024 613th RaBa21 🇭🇺 590 135 17ms 19 Jul 2025 614th DialFrost 🇸🇬 587 67 8ms 25 Jan 2025 615th sciencedjinn 586 136 9ms 8 Nov 2024 615th ihatethefrench 586 136 16ms 4 Jan 2025 615th Florian-Mt 586 136 19ms 5 Dec 2025 618th Schmitt-Very-Cool 586 159 440ms 26 Sep 2025 619th gigaprofisi 🇺🇸 585 110 9ms 11 Aug 2025 620th amazingalek 585 122 458ms 14 days ago 621st dokutan 584 174 5ms 21 Feb 2025 622nd olleicua 🇺🇸 583 82 36ms 18 Oct 2024 623rd Mabeloid 🇳🇴 582 121 1ms 21 Oct 2025 624th kurkale6ka 582 137 21ms 16 Oct 2024 624th 4ndyJ 🇬🇧 582 137 10ms 14 Nov 2024 624th Mikey-Beep 🇬🇧 582 137 16ms 6 Aug 2025 624th wobblybits 582 137 15ms 17 Aug 2025 628th michelebastione 🇮🇹 580 123 418ms 26 Aug 2025 629th emgordon154 579 49 3ms 9 Dec 2025 630th MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 631st 823126 575 112 9ms 13 Nov 2024 631st dokutan 575 112 9ms 22 Jun 2025 631st snoozingnewt 🇨🇦 575 112 9ms 2 Nov 2025 634th albanian-laundromat 574 77 2ms 3 Nov 2025 635th KatieLG 🇬🇧 574 99 1,537ms 1 Oct 2024 636th jgbaldwinbrown 573 123 2ms 36 hours ago 637th scpchicken 🇵🇼 573 139 16ms 6 Oct 2024 638th NanduBC 569 140 10ms 1 Oct 2024 638th jmerle 🇳🇱 569 140 10ms 10 Jan 2025 638th RobertHoeh 569 140 9ms 3 Mar 2025 First Prev 561–640 of 864 Next Last