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 526th Babafaba 650 102 436ms 11 Nov 2025 527th MeWhenI 🇻🇦 648 91 704ms 29 Aug 2025 528th msbranicky 648 123 17ms 3 Oct 2024 528th bobbysq 648 123 10ms 5 Oct 2024 528th wuzekai518 648 123 10ms 8 Oct 2024 531st rucin93 🇵🇱 648 144 185ms 28 Oct 2024 532nd koipondx86 645 123 2ms 8 Nov 2024 533rd CaedenHarper 🇨🇦 644 100 9ms 22 Aug 2025 533rd iczelia 🇩🇪 644 100 9ms 11 Oct 2025 533rd Yax42 🇫🇷 644 100 9ms 13 days ago 536th Apataras 643 145 381ms 25 Jun 2025 537th NotEvenIndian 642 124 10ms 22 Oct 2024 537th ridingqwerty 🇺🇸 642 124 16ms 16 Jan 2025 537th CommandLeo 🇮🇹 642 124 9ms 5 Oct 2025 540th tomh1012 641 111 396ms 8 Sep 2025 541st stefangimmillaro 639 73 234ms 1 Oct 2024 542nd Jonatan6 🇩🇰 639 110 2ms 24 Oct 2024 542nd solisolu 639 110 2ms 15 days ago 544th elgan65536 639 146 195ms 2 Oct 2024 544th dokutan 639 146 382ms 17 days ago 544th luuumine 🇫🇷 639 146 245ms 14 days ago 547th MeWhenI 🇻🇦 638 73 8ms 3 Oct 2024 548th bnic24 637 125 16ms 3 Oct 2024 548th adoxography 637 125 11ms 22 Oct 2024 548th wh3n3v3r 🇨🇿 637 125 10ms 18 Nov 2024 548th lelbal 637 125 9ms 14 Oct 2025 552nd msbranicky 634 188 296ms 7 Jan 2025 553rd Shanethegamer 🇺🇸 631 74 230ms 16 Oct 2024 554th XenThe 🇬🇧 631 102 9ms 7 Jul 2025 554th Florian-Mt 631 102 9ms 5 days ago 556th albanian-laundromat 631 264 444ms 3 Nov 2025 557th CatsAreFluffy 627 127 15ms 30 Oct 2024 557th WillowWispy 627 127 10ms 25 May 2025 559th DialFrost 🇸🇬 627 304 153ms 13 Aug 2025 560th AlephSquirrel 625 40 39ms 1 Oct 2024 561st dokutan 624 127 2ms 10 Dec 2024 562nd not-a-pokemon 622 113 2ms 23 Jul 2025 563rd codereport 🇨🇦 619 63 33ms 2 Oct 2024 564th BalaM314 619 104 9ms 4 Feb 2025 564th acollett89 619 104 9ms 15 Jul 2025 566th HumanoidCPU 619 107 399ms 17 Feb 2025 567th madex 🇩🇪 618 129 16ms 2 Oct 2024 567th RedzGoose 🇦🇺 618 129 13ms 15 Oct 2024 567th calebaitken 618 129 9ms 11 Apr 2025 567th rollershutter 618 129 17ms 21 days ago 567th JOrE20 🇺🇸 618 129 18ms 9 days ago 572nd MarcMush 🇫🇷 617 91 737ms 8 Oct 2024 573rd jupj 🇫🇮 617 114 2ms 20 Jul 2025 574th Ripick 617 135 346ms 23 Mar 2025 575th Europe2048 613 130 9ms 2 Oct 2024 575th nstearns96 🇬🇧 613 130 16ms 2 Oct 2024 575th Stockoh 🇫🇷 613 130 16ms 4 Jul 2025 578th evnu 612 147 78ms 12 Oct 2025 579th bac0id 610 141 369ms 10 Jan 2025 580th Seanharrs 609 117 411ms 15 Nov 2024 581st kaascevich 609 134 124ms 9 Jul 2025 582nd inverseLorentz 🇦🇺 608 131 9ms 7 Oct 2024 582nd dokutan 608 131 10ms 19 Oct 2024 582nd sciencejiho 608 131 16ms 11 Feb 2025 582nd Jaydosu 608 131 9ms 11 Apr 2025 582nd Emutis 🇱🇹 608 131 9ms 11 Nov 2025 587th HumanoidCPU 607 106 9ms 7 Mar 2025 587th daveberlin 607 106 9ms 27 Jun 2025 589th MeWhenI 🇻🇦 607 111 88ms 2 Oct 2024 590th Shanethegamer 🇺🇸 606 154 216ms 3 Oct 2024 591st emgordon154 606 156 9ms 13 Dec 2024 592nd MeWhenI 🇻🇦 605 73 2ms 2 Oct 2024 593rd alemelis 604 93 452ms 1 Oct 2024 594th roguh 🇬🇹 601 117 1ms 13 Oct 2024 594th iczelia 🇩🇪 601 117 2ms 25 Sep 2025 596th Mabeloid 🇳🇴 599 133 9ms 2 Oct 2024 597th MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 598th dokutan 596 116 2ms 21 days ago 599th dokutan 595 159 7ms 19 Oct 2024 600th arcpolaris 593 120 347ms 28 Jan 2025 First Prev 526–600 of 845 Next Last