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 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 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 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 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 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 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 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 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 601st bac0id 591 119 2ms 10 Jan 2025 602nd tatzyr 🇯🇵 590 81 33ms 23 Dec 2024 603rd RaBa21 🇭🇺 590 135 17ms 19 Jul 2025 604th DialFrost 🇸🇬 586 67 8ms 25 Jan 2025 605th sciencedjinn 586 136 9ms 8 Nov 2024 605th ihatethefrench 586 136 16ms 4 Jan 2025 605th Florian-Mt 586 136 19ms 5 days ago 608th Schmitt-Very-Cool 586 159 440ms 26 Sep 2025 609th gigaprofisi 🇺🇸 585 110 10ms 11 Aug 2025 610th dokutan 584 174 5ms 21 Feb 2025 611th Trip-kun 583 136 2ms 5 Oct 2024 612th olleicua 🇺🇸 582 82 34ms 18 Oct 2024 613th Mabeloid 🇳🇴 581 121 1ms 21 Oct 2025 614th kurkale6ka 581 137 22ms 16 Oct 2024 614th 4ndyJ 🇬🇧 581 137 10ms 14 Nov 2024 614th Mikey-Beep 🇬🇧 581 137 16ms 6 Aug 2025 614th wobblybits 581 137 15ms 17 Aug 2025 618th emgordon154 579 49 3ms 27 hours ago 619th michelebastione 🇮🇹 579 123 375ms 26 Aug 2025 620th MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 621st 823126 575 112 8ms 13 Nov 2024 621st dokutan 575 112 8ms 22 Jun 2025 621st snoozingnewt 🇨🇦 575 112 9ms 2 Nov 2025 624th albanian-laundromat 574 77 2ms 3 Nov 2025 625th KatieLG 🇬🇧 574 99 1,081ms 1 Oct 2024 626th scpchicken 🇵🇼 573 139 16ms 6 Oct 2024 627th NanduBC 569 140 10ms 1 Oct 2024 627th jmerle 🇳🇱 569 140 10ms 10 Jan 2025 627th RobertHoeh 569 140 9ms 3 Mar 2025 627th smilesformiles3 569 140 15ms 12 Jun 2025 627th artem-aramma 569 140 18ms 18 Jun 2025 627th Andrey2001 569 140 10ms 13 days ago 633rd MeWhenI 🇻🇦 569 164 285ms 6 Oct 2024 634th CaedenHarper 🇨🇦 567 104 730ms 16 days ago 635th FranklinJiaChen 565 141 13ms 2 Oct 2024 636th KatieLG 🇬🇧 562 85 34ms 12 Jan 2025 637th aliakseikalosha 561 127 401ms 10 Oct 2024 638th brimstonetrader 561 142 10ms 17 Oct 2024 638th codewrite 🇬🇧 561 142 11ms 5 May 2025 638th RobGLambert 561 142 16ms 8 Jun 2025 638th GodlyProgrammer1 561 142 16ms 18 days ago 642nd FortuiteMan 🇫🇷 559 272 37ms 18 days ago 643rd GeneralFabian 557 143 10ms 9 Dec 2024 643rd CutSandstone 557 143 9ms 30 Jan 2025 643rd kistlerf 🇨🇭 557 143 18ms 19 May 2025 646th madex 🇩🇪 555 116 9ms 1 Oct 2024 647th MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 648th hiichbindermax 553 144 15ms 2 Oct 2024 648th mathisfun271 553 144 9ms 14 Oct 2024 648th bob-th 553 144 10ms 22 Oct 2024 651st JDiLenarda 🇫🇷 553 165 1,278ms 1 Oct 2024 652nd KatieLG 🇬🇧 552 120 476ms 1 Oct 2024 653rd snoozingnewt 🇨🇦 552 148 124ms 20 days ago 654th edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 655th msbranicky 550 185 4ms 20 Jan 2025 656th mousetail 🇳🇱 549 128 2ms 3 Oct 2024 657th JunkIce 549 145 10ms 3 Dec 2024 657th Flekay 🇩🇪 549 145 10ms 10 Jul 2025 659th ethanlally 549 170 402ms 21 days ago 659th snoozingnewt 🇨🇦 549 170 435ms 5 days ago 661st gpikmddk 548 130 367ms 30 Oct 2025 662nd croc54 546 146 12ms 15 Dec 2024 663rd zakariamouhid 545 118 9ms 1 Oct 2024 663rd JOrE20 🇺🇸 545 118 9ms 9 days ago 665th xyangst 545 171 181ms 1 Oct 2024 665th kmathis22 545 171 430ms 21 days ago 667th najs91 544 131 343ms 15 Oct 2024 667th bac0id 544 131 370ms 9 Jan 2025 667th CaedenHarper 🇨🇦 544 131 336ms 17 Oct 2025 670th dokutan 543 122 396ms 19 Oct 2024 671st PyryL 🇫🇮 542 147 10ms 1 Mar 2025 672nd eranws 541 119 9ms 23 Dec 2024 673rd Sciman101 539 147 2ms 26 Mar 2025 674th mbittner20 538 148 11ms 13 Oct 2024 675th psaban 535 149 16ms 31 Jul 2025 First Prev 601–675 of 844 Next Last