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 NFA Simulator 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 NFA Simulator 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 600th ihatethefrench 586 136 17ms 4 Jan 2025 602nd Schmitt-Very-Cool 586 159 339ms 26 Sep 2025 603rd gigaprofisi 🇺🇸 585 110 9ms 11 Aug 2025 604th dokutan 584 174 5ms 21 Feb 2025 605th Trip-kun 583 136 2ms 5 Oct 2024 606th olleicua 🇺🇸 582 82 33ms 18 Oct 2024 607th Mabeloid 🇳🇴 581 121 2ms 21 Oct 2025 608th kurkale6ka 581 137 21ms 16 Oct 2024 608th 4ndyJ 🇬🇧 581 137 10ms 14 Nov 2024 608th Mikey-Beep 🇬🇧 581 137 16ms 6 Aug 2025 608th wobblybits 581 137 17ms 17 Aug 2025 612th michelebastione 🇮🇹 579 123 375ms 26 Aug 2025 613th MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 614th 823126 575 112 8ms 13 Nov 2024 614th dokutan 575 112 8ms 22 Jun 2025 614th snoozingnewt 🇺🇸 575 112 8ms 2 Nov 2025 617th albanian-laundromat 574 77 2ms 3 Nov 2025 618th KatieLG 🇬🇧 574 99 1,081ms 1 Oct 2024 619th scpchicken 🇵🇼 573 139 16ms 6 Oct 2024 620th NanduBC 569 140 10ms 1 Oct 2024 620th jmerle 🇳🇱 569 140 10ms 10 Jan 2025 620th RobertHoeh 569 140 9ms 3 Mar 2025 620th smilesformiles3 569 140 15ms 12 Jun 2025 620th artem-aramma 569 140 16ms 18 Jun 2025 620th Andrey2001 569 140 17ms 4 days ago 626th MeWhenI 🇻🇦 569 164 209ms 6 Oct 2024 627th CaedenHarper 🇨🇦 565 104 731ms 7 days ago 628th FranklinJiaChen 565 141 10ms 2 Oct 2024 629th KatieLG 🇬🇧 562 85 36ms 12 Jan 2025 630th aliakseikalosha 561 127 401ms 10 Oct 2024 631st brimstonetrader 561 142 10ms 17 Oct 2024 631st codewrite 🇬🇧 561 142 13ms 5 May 2025 631st RobGLambert 561 142 16ms 8 Jun 2025 631st GodlyProgrammer1 561 142 17ms 8 days ago 635th FortuiteMan 🇫🇷 559 272 37ms 9 days ago 636th GeneralFabian 557 143 9ms 9 Dec 2024 636th CutSandstone 557 143 9ms 30 Jan 2025 636th kistlerf 🇨🇭 557 143 16ms 19 May 2025 639th madex 🇩🇪 555 116 8ms 1 Oct 2024 640th MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 641st hiichbindermax 553 144 15ms 2 Oct 2024 641st mathisfun271 553 144 9ms 14 Oct 2024 641st bob-th 553 144 10ms 22 Oct 2024 644th JDiLenarda 🇫🇷 553 165 1,278ms 1 Oct 2024 645th KatieLG 🇬🇧 552 120 585ms 1 Oct 2024 646th snoozingnewt 🇺🇸 552 148 114ms 11 days ago 647th edsrzf 🇳🇿 551 135 5ms 27 Feb 2025 648th msbranicky 550 185 4ms 20 Jan 2025 649th mousetail 🇳🇱 549 128 2ms 3 Oct 2024 650th JunkIce 549 145 10ms 3 Dec 2024 650th Flekay 🇩🇪 549 145 10ms 10 Jul 2025 652nd ethanlally 549 170 330ms 12 days ago 653rd gpikmddk 548 130 367ms 30 Oct 2025 654th emgordon154 546 52 2ms 3 Nov 2024 655th croc54 546 146 11ms 15 Dec 2024 656th zakariamouhid 545 118 9ms 1 Oct 2024 656th JOrE20 🇺🇸 545 118 9ms 3 hours ago 658th xyangst 545 171 171ms 1 Oct 2024 658th kmathis22 545 171 344ms 12 days ago 660th najs91 544 131 343ms 15 Oct 2024 660th bac0id 544 131 370ms 9 Jan 2025 660th CaedenHarper 🇨🇦 544 131 340ms 17 Oct 2025 663rd dokutan 543 122 459ms 19 Oct 2024 664th PyryL 🇫🇮 542 147 10ms 1 Mar 2025 665th eranws 541 119 9ms 23 Dec 2024 666th Sciman101 539 147 2ms 26 Mar 2025 667th mbittner20 538 148 9ms 13 Oct 2024 668th psaban 535 149 16ms 31 Jul 2025 668th TheZwierzLF 🇵🇱 535 149 9ms 6 days ago 670th msbranicky 533 175 162ms 13 Dec 2024 671st deancureton 532 121 9ms 30 Dec 2024 672nd FlorianCassayre 🇫🇷 531 150 17ms 1 Oct 2024 672nd jameswmccarty 531 150 9ms 5 Oct 2024 672nd yousefalizadeh 531 150 10ms 23 Oct 2024 672nd feherd 531 150 12ms 31 Oct 2024 First Prev 601–675 of 834 Next Last