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 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 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 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 Lily 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 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 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 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 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 641st Mabeloid 🇳🇴 584 121 1ms 21 Oct 2025 642nd olleicua 🇺🇸 583 82 35ms 18 Oct 2024 643rd kurkale6ka 582 137 22ms 16 Oct 2024 643rd 4ndyJ 🇬🇧 582 137 11ms 14 Nov 2024 643rd Mikey-Beep 🇬🇧 582 137 17ms 6 Aug 2025 643rd wobblybits 582 137 19ms 17 Aug 2025 643rd Andrey2001 582 137 9ms 19 days ago 648th michelebastione 🇮🇹 580 123 418ms 26 Aug 2025 649th emgordon154 579 49 3ms 9 Dec 2025 650th MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 651st 823126 575 112 10ms 13 Nov 2024 651st dokutan 575 112 11ms 22 Jun 2025 651st snoozingnewt 🇨🇦 575 112 14ms 2 Nov 2025 654th KatieLG 🇬🇧 574 99 1,368ms 1 Oct 2024 655th jgbaldwinbrown 574 123 2ms 14 Jan 2026 656th scpchicken 🇵🇼 573 139 17ms 6 Oct 2024 656th tomh1012 573 139 19ms 16 Jan 2026 658th NanduBC 569 140 9ms 1 Oct 2024 658th jmerle 🇳🇱 569 140 10ms 10 Jan 2025 658th RobertHoeh 569 140 11ms 3 Mar 2025 658th smilesformiles3 569 140 17ms 12 Jun 2025 658th artem-aramma 569 140 18ms 18 Jun 2025 663rd MeWhenI 🇻🇦 569 164 195ms 6 Oct 2024 664th FranklinJiaChen 565 141 10ms 2 Oct 2024 665th albanian-laundromat 564 77 2ms 3 Nov 2025 666th KatieLG 🇬🇧 563 85 35ms 12 Jan 2025 667th aliakseikalosha 562 127 456ms 10 Oct 2024 668th brimstonetrader 561 142 11ms 17 Oct 2024 668th codewrite 🇬🇧 561 142 10ms 5 May 2025 668th RobGLambert 561 142 17ms 8 Jun 2025 668th GodlyProgrammer1 561 142 18ms 22 Nov 2025 668th jbjd 561 142 11ms 17 days ago 673rd dokutan 561 155 396ms 10 days ago 674th ravnskjaer 🇩🇰 559 167 455ms 15 Dec 2025 675th FortuiteMan 🇫🇷 559 272 36ms 22 Nov 2025 676th GeneralFabian 557 143 10ms 9 Dec 2024 676th CutSandstone 557 143 10ms 30 Jan 2025 676th kistlerf 🇨🇭 557 143 17ms 19 May 2025 679th madex 🇩🇪 555 116 10ms 1 Oct 2024 680th hiichbindermax 554 144 17ms 2 Oct 2024 680th mathisfun271 554 144 10ms 14 Oct 2024 680th bob-th 554 144 10ms 22 Oct 2024 683rd MeWhenI 🇻🇦 554 290 8ms 2 Oct 2024 684th CaedenHarper 🇨🇦 553 104 1,139ms 24 Nov 2025 685th JDiLenarda 🇫🇷 553 165 1,573ms 1 Oct 2024 686th mousetail 🇳🇱 552 128 2ms 3 Oct 2024 687th snoozingnewt 🇨🇦 552 148 121ms 20 Nov 2025 688th msbranicky 552 185 4ms 20 Jan 2025 689th edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 690th JunkIce 550 145 10ms 3 Dec 2024 690th denkyuu1 550 145 17ms 9 days ago 692nd gpikmddk 549 130 464ms 30 Oct 2025 693rd ethanlally 549 170 377ms 19 Nov 2025 693rd snoozingnewt 🇨🇦 549 170 485ms 5 Dec 2025 695th zakariamouhid 546 118 14ms 1 Oct 2024 696th croc54 546 146 10ms 15 Dec 2024 697th kmathis22 546 171 350ms 19 Nov 2025 698th najs91 545 131 420ms 15 Oct 2024 698th bac0id 545 131 446ms 9 Jan 2025 698th CaedenHarper 🇨🇦 545 131 407ms 17 Oct 2025 701st xyangst 545 171 167ms 1 Oct 2024 702nd dokutan 544 122 409ms 19 Oct 2024 703rd PyryL 🇫🇮 542 147 10ms 1 Mar 2025 704th eranws 541 119 10ms 23 Dec 2024 705th dokutan 539 131 2ms 10 days ago 706th Sciman101 539 147 2ms 26 Mar 2025 707th mbittner20 539 148 10ms 13 Oct 2024 707th YAJUE114514 539 148 10ms 12 Dec 2025 709th psaban 535 149 15ms 31 Jul 2025 709th TheZwierzLF 🇵🇱 535 149 11ms 24 Nov 2025 711th msbranicky 533 175 165ms 13 Dec 2024 712th deancureton 532 121 10ms 30 Dec 2024 713th FlorianCassayre 🇫🇷 531 150 18ms 1 Oct 2024 713th jameswmccarty 531 150 10ms 5 Oct 2024 713th yousefalizadeh 531 150 10ms 23 Oct 2024 713th feherd 531 150 11ms 31 Oct 2024 713th kadamkaustubh 531 150 10ms 8 Nov 2025 718th msbranicky 530 126 2,523ms 9 Jan 2025 719th Macweese 525 178 405ms 3 Aug 2025 720th adamnielson42 🇺🇸 524 152 10ms 6 Oct 2024 First Prev 641–720 of 895 Next Last