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 525th bobbysq 648 123 10ms 5 Oct 2024 525th wuzekai518 648 123 10ms 8 Oct 2024 528th rucin93 🇵🇱 648 144 149ms 28 Oct 2024 529th koipondx86 645 123 3ms 8 Nov 2024 530th CaedenHarper 🇨🇦 644 100 10ms 22 Aug 2025 530th iczelia 🇩🇪 644 100 9ms 11 Oct 2025 530th Yax42 🇫🇷 644 100 9ms 10 days ago 533rd Apataras 643 145 302ms 25 Jun 2025 534th NotEvenIndian 642 124 10ms 22 Oct 2024 534th ridingqwerty 🇺🇸 642 124 16ms 16 Jan 2025 534th CommandLeo 🇮🇹 642 124 9ms 5 Oct 2025 537th tomh1012 641 111 396ms 8 Sep 2025 538th Jonatan6 🇩🇰 640 110 2ms 24 Oct 2024 538th solisolu 640 110 2ms 12 days ago 540th stefangimmillaro 639 73 234ms 1 Oct 2024 541st elgan65536 639 146 154ms 2 Oct 2024 541st dokutan 639 146 328ms 14 days ago 541st luuumine 🇫🇷 639 146 148ms 11 days ago 544th MeWhenI 🇻🇦 638 73 8ms 3 Oct 2024 545th bnic24 637 125 16ms 3 Oct 2024 545th adoxography 637 125 11ms 22 Oct 2024 545th wh3n3v3r 🇨🇿 637 125 10ms 18 Nov 2024 545th lelbal 637 125 9ms 14 Oct 2025 549th msbranicky 634 188 267ms 7 Jan 2025 550th Shanethegamer 🇺🇸 631 74 230ms 16 Oct 2024 551st XenThe 🇬🇧 631 102 9ms 7 Jul 2025 551st Florian-Mt 631 102 10ms 2 days ago 553rd albanian-laundromat 631 264 444ms 3 Nov 2025 554th CatsAreFluffy 627 127 15ms 30 Oct 2024 554th WillowWispy 627 127 10ms 25 May 2025 556th DialFrost 🇸🇬 627 304 152ms 13 Aug 2025 557th AlephSquirrel 625 40 48ms 1 Oct 2024 558th dokutan 624 127 2ms 10 Dec 2024 559th not-a-pokemon 623 113 2ms 23 Jul 2025 560th Lv0Sys 🇵🇱 622 128 16ms 15 Jun 2025 561st codereport 🇨🇦 619 63 34ms 2 Oct 2024 562nd BalaM314 619 104 9ms 4 Feb 2025 562nd acollett89 619 104 9ms 15 Jul 2025 564th HumanoidCPU 619 107 463ms 17 Feb 2025 565th madex 🇩🇪 618 129 16ms 2 Oct 2024 565th RedzGoose 🇦🇺 618 129 13ms 15 Oct 2024 565th calebaitken 618 129 9ms 11 Apr 2025 565th rollershutter 618 129 17ms 17 days ago 565th JOrE20 🇺🇸 618 129 21ms 6 days ago 570th MarcMush 🇫🇷 617 91 737ms 8 Oct 2024 571st jupj 🇫🇮 617 114 2ms 20 Jul 2025 572nd Ripick 617 135 335ms 23 Mar 2025 573rd Europe2048 613 130 9ms 2 Oct 2024 573rd nstearns96 🇬🇧 613 130 16ms 2 Oct 2024 573rd Stockoh 🇫🇷 613 130 16ms 4 Jul 2025 576th evnu 612 147 78ms 12 Oct 2025 577th bac0id 610 141 381ms 10 Jan 2025 578th Seanharrs 609 117 411ms 15 Nov 2024 579th kaascevich 609 134 114ms 9 Jul 2025 580th inverseLorentz 🇦🇺 608 131 9ms 7 Oct 2024 580th dokutan 608 131 10ms 19 Oct 2024 580th sciencejiho 608 131 16ms 11 Feb 2025 580th Jaydosu 608 131 9ms 11 Apr 2025 580th Emutis 🇱🇹 608 131 9ms 26 days ago 585th HumanoidCPU 607 106 9ms 7 Mar 2025 585th daveberlin 607 106 9ms 27 Jun 2025 587th MeWhenI 🇻🇦 607 111 79ms 2 Oct 2024 588th Shanethegamer 🇺🇸 606 154 145ms 3 Oct 2024 589th emgordon154 606 156 8ms 13 Dec 2024 590th MeWhenI 🇻🇦 605 73 2ms 2 Oct 2024 591st alemelis 604 93 467ms 1 Oct 2024 592nd roguh 🇬🇹 602 117 2ms 13 Oct 2024 592nd iczelia 🇩🇪 602 117 3ms 25 Sep 2025 594th Mabeloid 🇳🇴 599 133 9ms 2 Oct 2024 595th MeWhenI 🇻🇦 597 98 8ms 1 Oct 2024 596th dokutan 596 116 2ms 18 days ago 597th dokutan 595 159 7ms 19 Oct 2024 598th arcpolaris 593 120 347ms 28 Jan 2025 599th SirBogman 🇺🇸 591 64 122ms 11 Jul 2025 600th bac0id 591 119 2ms 10 Jan 2025 First Prev 526–600 of 842 Next Last