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 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 Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers 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 ><> ALGOL 68 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 ArkScript 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 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 ArkScript 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 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 Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers 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 648 123 16ms 3 Oct 2024 561st bobbysq 648 123 11ms 5 Oct 2024 561st wuzekai518 648 123 10ms 8 Oct 2024 564th rucin93 🇵🇱 648 144 156ms 28 Oct 2024 565th koipondx86 645 123 2ms 8 Nov 2024 566th frankgraziano 645 128 7ms 16 days ago 567th CaedenHarper 🇨🇦 644 100 9ms 22 Aug 2025 567th iczelia 🇩🇪 644 100 11ms 11 Oct 2025 567th Yax42 🇫🇷 644 100 10ms 27 Nov 2025 570th Apataras 644 145 390ms 25 Jun 2025 571st tomh1012 643 111 539ms 8 Sep 2025 572nd NotEvenIndian 643 124 10ms 22 Oct 2024 572nd ridingqwerty 🇺🇸 643 124 16ms 16 Jan 2025 572nd CommandLeo 🇮🇹 643 124 10ms 5 Oct 2025 572nd JOrE20 643 124 17ms 16 days ago 576th Jonatan6 🇩🇰 642 110 2ms 24 Oct 2024 577th dokutan 640 146 379ms 23 Nov 2025 578th stefangimmillaro 639 73 306ms 1 Oct 2024 579th elgan65536 🇺🇸 639 146 161ms 2 Oct 2024 579th luuumine 🇫🇷 639 146 159ms 26 Nov 2025 581st MeWhenI 🇻🇦 638 73 7ms 3 Oct 2024 582nd bnic24 638 125 16ms 3 Oct 2024 582nd adoxography 638 125 11ms 22 Oct 2024 582nd wh3n3v3r 🇨🇿 638 125 10ms 18 Nov 2024 582nd lelbal 638 125 10ms 14 Oct 2025 582nd denkyuu1 638 125 16ms 19 mins ago 587th Yax42 🇫🇷 636 111 2ms 9 Jan 2026 588th MeWhenI 🇻🇦 634 91 994ms 29 Aug 2025 589th msbranicky 634 188 301ms 7 Jan 2025 590th KatieLG 🇬🇧 632 105 439ms 27 days ago 591st Shanethegamer 🇺🇸 631 74 285ms 16 Oct 2024 592nd XenThe 🇬🇧 631 102 11ms 7 Jul 2025 592nd Florian-Mt 631 102 10ms 5 Dec 2025 594th albanian-laundromat 631 264 1,429ms 3 Nov 2025 595th CatsAreFluffy 628 127 17ms 30 Oct 2024 595th WillowWispy 628 127 11ms 25 May 2025 597th DialFrost 🇸🇬 627 304 153ms 13 Aug 2025 598th AlephSquirrel 625 40 43ms 1 Oct 2024 599th not-a-pokemon 625 113 1ms 23 Jul 2025 600th dokutan 624 127 2ms 10 Dec 2024 601st HumanoidCPU 620 107 502ms 17 Feb 2025 602nd codereport 🇨🇦 619 63 33ms 2 Oct 2024 603rd BalaM314 619 104 11ms 4 Feb 2025 603rd acollett89 619 104 11ms 15 Jul 2025 605th jupj 🇫🇮 619 114 2ms 20 Jul 2025 606th madex 🇩🇪 618 129 16ms 2 Oct 2024 606th RedzGoose 🇦🇺 618 129 11ms 15 Oct 2024 606th calebaitken 618 129 10ms 11 Apr 2025 606th rollershutter 618 129 17ms 20 Nov 2025 610th MarcMush 🇫🇷 617 91 813ms 8 Oct 2024 611th Ripick 617 135 366ms 23 Mar 2025 612th bac0id 616 141 420ms 10 Jan 2025 613th Europe2048 613 130 10ms 2 Oct 2024 613th nstearns96 🇬🇧 613 130 17ms 2 Oct 2024 613th Stockoh 🇫🇷 613 130 17ms 4 Jul 2025 616th evnu 612 147 87ms 12 Oct 2025 617th Seanharrs 🇦🇺 610 117 471ms 15 Nov 2024 618th inverseLorentz 🇦🇺 609 131 11ms 7 Oct 2024 618th dokutan 609 131 11ms 19 Oct 2024 618th sciencejiho 609 131 17ms 11 Feb 2025 618th Jaydosu 609 131 11ms 11 Apr 2025 618th Emutis 🇱🇹 609 131 9ms 11 Nov 2025 623rd kaascevich 609 134 125ms 9 Jul 2025 624th HumanoidCPU 608 106 11ms 7 Mar 2025 624th daveberlin 608 106 10ms 27 Jun 2025 626th MeWhenI 🇻🇦 607 111 88ms 2 Oct 2024 627th Shanethegamer 🇺🇸 606 154 156ms 3 Oct 2024 628th emgordon154 606 156 9ms 13 Dec 2024 629th alemelis 604 93 467ms 1 Oct 2024 630th roguh 🇬🇹 604 117 1ms 13 Oct 2024 630th iczelia 🇩🇪 604 117 2ms 25 Sep 2025 632nd albanian-laundromat 603 72 1ms 13 days ago 633rd Mabeloid 🇳🇴 600 133 11ms 2 Oct 2024 634th dokutan 598 116 2ms 19 Nov 2025 635th MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 636th MeWhenI 🇻🇦 595 73 2ms 2 Oct 2024 637th arcpolaris 595 120 396ms 28 Jan 2025 638th dokutan 595 159 6ms 19 Oct 2024 639th SirBogman 🇺🇸 593 64 124ms 11 Jul 2025 640th bac0id 593 119 2ms 10 Jan 2025 First Prev 561–640 of 906 Next Last