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 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 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 Calendar 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 Arturo Befunge BQN CJam CoffeeScript Egel Erlang 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 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 Arturo Befunge BQN CJam CoffeeScript Egel Erlang 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 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 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 Calendar 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 601st Mabeloid 🇳🇴 581 121 2ms 21 Oct 2025 602nd kurkale6ka 581 137 21ms 16 Oct 2024 602nd 4ndyJ 🇬🇧 581 137 10ms 14 Nov 2024 602nd Mikey-Beep 🇬🇧 581 137 16ms 6 Aug 2025 602nd wobblybits 581 137 17ms 17 Aug 2025 606th michelebastione 🇮🇹 579 123 375ms 26 Aug 2025 607th MeWhenI 🇻🇦 576 331 16ms 2 Oct 2024 608th albanian-laundromat 574 77 2ms 22 days ago 609th KatieLG 🇬🇧 574 99 1,081ms 1 Oct 2024 610th 823126 574 112 9ms 13 Nov 2024 610th dokutan 574 112 9ms 22 Jun 2025 610th snoozingnewt 🇺🇸 574 112 9ms 22 days ago 613th scpchicken 🇵🇼 573 139 16ms 6 Oct 2024 614th NanduBC 569 140 10ms 1 Oct 2024 614th jmerle 🇳🇱 569 140 10ms 10 Jan 2025 614th RobertHoeh 569 140 9ms 3 Mar 2025 614th smilesformiles3 569 140 15ms 12 Jun 2025 614th artem-aramma 569 140 16ms 18 Jun 2025 619th MeWhenI 🇻🇦 568 164 209ms 6 Oct 2024 620th CaedenHarper 🇨🇦 565 104 731ms 26 hours ago 621st FranklinJiaChen 565 141 10ms 2 Oct 2024 622nd KatieLG 🇬🇧 562 85 36ms 12 Jan 2025 623rd aliakseikalosha 561 127 401ms 10 Oct 2024 624th brimstonetrader 561 142 10ms 17 Oct 2024 624th codewrite 🇬🇧 561 142 13ms 5 May 2025 624th RobGLambert 561 142 16ms 8 Jun 2025 624th GodlyProgrammer1 561 142 17ms 2 days ago 628th FortuiteMan 🇫🇷 559 272 37ms 2 days ago 629th GeneralFabian 557 143 9ms 9 Dec 2024 629th CutSandstone 557 143 9ms 30 Jan 2025 629th kistlerf 🇨🇭 557 143 16ms 19 May 2025 632nd madex 🇩🇪 555 116 11ms 1 Oct 2024 633rd MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 634th hiichbindermax 553 144 15ms 2 Oct 2024 634th mathisfun271 553 144 9ms 14 Oct 2024 634th bob-th 553 144 10ms 22 Oct 2024 637th JDiLenarda 🇫🇷 553 165 1,278ms 1 Oct 2024 638th KatieLG 🇬🇧 552 120 585ms 1 Oct 2024 639th snoozingnewt 🇺🇸 552 148 119ms 4 days ago 640th edsrzf 🇳🇿 551 135 4ms 27 Feb 2025 641st msbranicky 550 185 4ms 20 Jan 2025 642nd mousetail 🇳🇱 549 128 2ms 3 Oct 2024 643rd JunkIce 549 145 10ms 3 Dec 2024 643rd Flekay 🇩🇪 549 145 10ms 10 Jul 2025 645th ethanlally 549 170 330ms 6 days ago 646th gpikmddk 548 130 367ms 25 days ago 647th emgordon154 546 52 2ms 3 Nov 2024 648th zakariamouhid 545 118 9ms 1 Oct 2024 649th croc54 545 146 11ms 15 Dec 2024 650th kmathis22 545 171 344ms 5 days ago 651st najs91 544 131 343ms 15 Oct 2024 651st bac0id 544 131 370ms 9 Jan 2025 651st CaedenHarper 🇨🇦 544 131 340ms 17 Oct 2025 654th xyangst 544 171 171ms 1 Oct 2024 655th dokutan 543 122 459ms 19 Oct 2024 656th PyryL 🇫🇮 542 147 10ms 1 Mar 2025 657th eranws 541 119 9ms 23 Dec 2024 658th Sciman101 539 147 2ms 26 Mar 2025 659th mbittner20 538 148 9ms 13 Oct 2024 660th psaban 534 149 16ms 31 Jul 2025 660th TheZwierzLF 🇵🇱 534 149 11ms 10 hours ago 662nd deancureton 532 121 9ms 30 Dec 2024 663rd msbranicky 532 175 162ms 13 Dec 2024 664th FlorianCassayre 🇫🇷 531 150 17ms 1 Oct 2024 664th jameswmccarty 531 150 9ms 5 Oct 2024 664th yousefalizadeh 531 150 10ms 23 Oct 2024 664th feherd 531 150 12ms 31 Oct 2024 664th kadamkaustubh 531 150 9ms 17 days ago 669th msbranicky 527 126 2,869ms 9 Jan 2025 670th adamnielson42 🇺🇸 524 152 9ms 6 Oct 2024 670th voidgloom 524 152 10ms 22 Oct 2024 670th omero-san 524 152 9ms 22 Sep 2025 670th brochmann 🇸🇪 524 152 10ms 12 Oct 2025 674th Macweese 524 178 308ms 3 Aug 2025 675th galloj 🇨🇿 522 112 27ms 4 Oct 2024 First Prev 601–675 of 825 Next Last