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 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 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 526th MeWhenI 🇻🇦 645 91 737ms 29 Aug 2025 527th koipondx86 645 123 3ms 8 Nov 2024 528th CaedenHarper 🇨🇦 644 100 10ms 22 Aug 2025 528th iczelia 🇩🇪 644 100 9ms 11 Oct 2025 528th Yax42 🇫🇷 644 100 9ms 9 days ago 531st Apataras 643 145 302ms 25 Jun 2025 532nd NotEvenIndian 642 124 10ms 22 Oct 2024 532nd ridingqwerty 🇺🇸 642 124 16ms 16 Jan 2025 532nd CommandLeo 🇮🇹 642 124 10ms 5 Oct 2025 535th tomh1012 641 111 396ms 8 Sep 2025 536th Jonatan6 🇩🇰 640 110 2ms 24 Oct 2024 536th solisolu 640 110 2ms 11 days ago 538th stefangimmillaro 639 73 234ms 1 Oct 2024 539th elgan65536 639 146 154ms 2 Oct 2024 539th dokutan 639 146 328ms 13 days ago 539th luuumine 🇫🇷 639 146 148ms 10 days ago 542nd MeWhenI 🇻🇦 638 73 8ms 3 Oct 2024 543rd bnic24 637 125 16ms 3 Oct 2024 543rd adoxography 637 125 10ms 22 Oct 2024 543rd wh3n3v3r 🇨🇿 637 125 10ms 18 Nov 2024 543rd lelbal 637 125 10ms 14 Oct 2025 547th msbranicky 634 188 267ms 7 Jan 2025 548th Shanethegamer 🇺🇸 631 74 230ms 16 Oct 2024 549th XenThe 🇬🇧 631 102 9ms 7 Jul 2025 549th Florian-Mt 631 102 10ms 30 hours ago 551st albanian-laundromat 631 264 444ms 3 Nov 2025 552nd CatsAreFluffy 627 127 17ms 30 Oct 2024 552nd WillowWispy 627 127 10ms 25 May 2025 554th DialFrost 🇸🇬 627 304 152ms 13 Aug 2025 555th AlephSquirrel 625 40 48ms 1 Oct 2024 556th dokutan 624 127 2ms 10 Dec 2024 557th not-a-pokemon 623 113 2ms 23 Jul 2025 558th Lv0Sys 🇵🇱 622 128 16ms 15 Jun 2025 559th codereport 🇨🇦 619 63 34ms 2 Oct 2024 560th BalaM314 619 104 9ms 4 Feb 2025 560th acollett89 619 104 9ms 15 Jul 2025 562nd HumanoidCPU 619 107 463ms 17 Feb 2025 563rd madex 🇩🇪 618 129 16ms 2 Oct 2024 563rd RedzGoose 🇦🇺 618 129 10ms 15 Oct 2024 563rd calebaitken 618 129 9ms 11 Apr 2025 563rd rollershutter 618 129 17ms 16 days ago 563rd JOrE20 🇺🇸 618 129 21ms 5 days ago 568th MarcMush 🇫🇷 617 91 737ms 8 Oct 2024 569th jupj 🇫🇮 617 114 2ms 20 Jul 2025 570th Ripick 617 135 335ms 23 Mar 2025 571st Europe2048 613 130 9ms 2 Oct 2024 571st nstearns96 🇬🇧 613 130 15ms 2 Oct 2024 571st Stockoh 🇫🇷 613 130 15ms 4 Jul 2025 574th evnu 612 147 78ms 12 Oct 2025 575th Seanharrs 609 117 411ms 15 Nov 2024 576th kaascevich 609 134 114ms 9 Jul 2025 577th bac0id 609 141 381ms 10 Jan 2025 578th inverseLorentz 🇦🇺 608 131 10ms 7 Oct 2024 578th dokutan 608 131 10ms 19 Oct 2024 578th sciencejiho 608 131 17ms 11 Feb 2025 578th Jaydosu 608 131 10ms 11 Apr 2025 578th Emutis 🇱🇹 608 131 10ms 25 days ago 583rd HumanoidCPU 607 106 9ms 7 Mar 2025 583rd daveberlin 607 106 9ms 27 Jun 2025 585th MeWhenI 🇻🇦 607 111 79ms 2 Oct 2024 586th Shanethegamer 🇺🇸 606 154 145ms 3 Oct 2024 587th emgordon154 606 156 8ms 13 Dec 2024 588th MeWhenI 🇻🇦 605 73 2ms 2 Oct 2024 589th albanian-laundromat 605 315 13ms 11 days ago 590th alemelis 604 93 467ms 1 Oct 2024 591st roguh 🇬🇹 602 117 2ms 13 Oct 2024 591st iczelia 🇩🇪 602 117 3ms 25 Sep 2025 593rd Mabeloid 🇳🇴 599 133 10ms 2 Oct 2024 594th MeWhenI 🇻🇦 597 98 8ms 1 Oct 2024 595th dokutan 596 116 2ms 17 days ago 596th dokutan 595 159 7ms 19 Oct 2024 597th arcpolaris 593 120 347ms 28 Jan 2025 598th SirBogman 🇺🇸 591 64 122ms 11 Jul 2025 599th bac0id 591 119 2ms 10 Jan 2025 600th tatzyr 🇯🇵 590 81 36ms 23 Dec 2024 First Prev 526–600 of 839 Next Last