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 560th bobbysq 648 123 11ms 5 Oct 2024 560th wuzekai518 648 123 10ms 8 Oct 2024 563rd rucin93 🇵🇱 648 144 164ms 28 Oct 2024 564th koipondx86 645 123 2ms 8 Nov 2024 565th frankgraziano 645 128 9ms 12 days ago 566th CaedenHarper 🇨🇦 644 100 9ms 22 Aug 2025 566th iczelia 🇩🇪 644 100 10ms 11 Oct 2025 566th Yax42 🇫🇷 644 100 10ms 27 Nov 2025 569th Apataras 644 145 390ms 25 Jun 2025 570th tomh1012 643 111 539ms 8 Sep 2025 571st NotEvenIndian 643 124 10ms 22 Oct 2024 571st ridingqwerty 🇺🇸 643 124 16ms 16 Jan 2025 571st CommandLeo 🇮🇹 643 124 10ms 5 Oct 2025 571st JOrE20 643 124 17ms 12 days ago 575th Jonatan6 🇩🇰 642 110 2ms 24 Oct 2024 576th dokutan 640 146 379ms 23 Nov 2025 577th stefangimmillaro 639 73 306ms 1 Oct 2024 578th elgan65536 🇺🇸 639 146 169ms 2 Oct 2024 578th luuumine 🇫🇷 639 146 159ms 26 Nov 2025 580th MeWhenI 🇻🇦 638 73 8ms 3 Oct 2024 581st bnic24 638 125 16ms 3 Oct 2024 581st adoxography 638 125 11ms 22 Oct 2024 581st wh3n3v3r 🇨🇿 638 125 10ms 18 Nov 2024 581st lelbal 638 125 10ms 14 Oct 2025 585th Yax42 🇫🇷 636 111 2ms 9 Jan 2026 586th MeWhenI 🇻🇦 634 91 994ms 29 Aug 2025 587th msbranicky 634 188 301ms 7 Jan 2025 588th KatieLG 🇬🇧 632 105 439ms 23 days ago 589th Shanethegamer 🇺🇸 631 74 285ms 16 Oct 2024 590th XenThe 🇬🇧 631 102 9ms 7 Jul 2025 590th Florian-Mt 631 102 9ms 5 Dec 2025 592nd albanian-laundromat 631 264 1,512ms 3 Nov 2025 593rd CatsAreFluffy 628 127 17ms 30 Oct 2024 593rd WillowWispy 628 127 11ms 25 May 2025 595th DialFrost 🇸🇬 627 304 153ms 13 Aug 2025 596th AlephSquirrel 625 40 43ms 1 Oct 2024 597th not-a-pokemon 625 113 1ms 23 Jul 2025 598th dokutan 624 127 2ms 10 Dec 2024 599th HumanoidCPU 620 107 502ms 17 Feb 2025 600th codereport 🇨🇦 619 63 33ms 2 Oct 2024 601st BalaM314 619 104 11ms 4 Feb 2025 601st acollett89 619 104 9ms 15 Jul 2025 603rd jupj 🇫🇮 619 114 2ms 20 Jul 2025 604th madex 🇩🇪 618 129 16ms 2 Oct 2024 604th RedzGoose 🇦🇺 618 129 11ms 15 Oct 2024 604th calebaitken 618 129 10ms 11 Apr 2025 604th rollershutter 618 129 17ms 20 Nov 2025 608th MarcMush 🇫🇷 617 91 813ms 8 Oct 2024 609th Ripick 617 135 366ms 23 Mar 2025 610th bac0id 616 141 420ms 10 Jan 2025 611th Europe2048 613 130 10ms 2 Oct 2024 611th nstearns96 🇬🇧 613 130 17ms 2 Oct 2024 611th Stockoh 🇫🇷 613 130 17ms 4 Jul 2025 614th evnu 612 147 88ms 12 Oct 2025 615th Seanharrs 🇦🇺 610 117 471ms 15 Nov 2024 616th inverseLorentz 🇦🇺 609 131 11ms 7 Oct 2024 616th dokutan 609 131 11ms 19 Oct 2024 616th sciencejiho 609 131 17ms 11 Feb 2025 616th Jaydosu 609 131 11ms 11 Apr 2025 616th Emutis 🇱🇹 609 131 9ms 11 Nov 2025 621st kaascevich 609 134 127ms 9 Jul 2025 622nd HumanoidCPU 608 106 10ms 7 Mar 2025 622nd daveberlin 608 106 9ms 27 Jun 2025 624th MeWhenI 🇻🇦 607 111 88ms 2 Oct 2024 625th Shanethegamer 🇺🇸 606 154 156ms 3 Oct 2024 626th emgordon154 606 156 9ms 13 Dec 2024 627th alemelis 604 93 467ms 1 Oct 2024 628th roguh 🇬🇹 604 117 1ms 13 Oct 2024 628th iczelia 🇩🇪 604 117 2ms 25 Sep 2025 630th albanian-laundromat 603 72 2ms 9 days ago 631st Mabeloid 🇳🇴 599 133 11ms 2 Oct 2024 632nd dokutan 598 116 2ms 19 Nov 2025 633rd MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 634th MeWhenI 🇻🇦 595 73 2ms 2 Oct 2024 635th arcpolaris 595 120 396ms 28 Jan 2025 636th dokutan 595 159 6ms 19 Oct 2024 637th SirBogman 🇺🇸 593 64 127ms 11 Jul 2025 638th bac0id 593 119 2ms 10 Jan 2025 639th tatzyr 🇯🇵 591 81 37ms 23 Dec 2024 640th RaBa21 🇭🇺 591 135 17ms 19 Jul 2025 First Prev 561–640 of 904 Next Last