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 Calendar 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 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 ArkScript 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 ArkScript 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 Calendar 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 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 481st dtbao20 🇻🇳 681 117 16ms 1 Oct 2024 481st Pyroan 681 117 16ms 22 Feb 2025 481st vgamula 🇺🇦 681 117 19ms 5 Aug 2025 481st FortuiteMan 🇫🇷 681 117 20ms 1 Dec 2025 481st yujqiao 681 117 16ms 25 days ago 486th the-zammers 680 163 149ms 1 Dec 2024 487th Shanethegamer 🇺🇸 679 65 2ms 1 Oct 2024 488th BlankSpruce 677 104 2ms 1 Oct 2024 489th plcc0 676 37 71ms 6 Apr 2025 490th commandblockguy 🇺🇸 676 98 483ms 1 Sep 2025 491st elgan65536 675 118 10ms 2 Oct 2024 491st logvp 675 118 15ms 6 Oct 2024 491st ahmetdemirag 🇨🇾 675 118 9ms 6 Feb 2025 491st plcc0 675 118 15ms 6 Apr 2025 491st KatieLG 🇬🇧 675 118 16ms 20 Apr 2025 491st dirckvdende 675 118 19ms 10 Jul 2025 497th tailorspy 675 128 403ms 4 Oct 2024 498th edsrzf 🇳🇿 673 99 3,137ms 5 Jul 2025 499th jerrandolph 673 177 285ms 25 Sep 2025 499th CaedenHarper 🇨🇦 673 177 278ms 17 Nov 2025 501st Herbert00709 🇵🇱 670 105 2ms 14 Jun 2025 502nd emgordon154 670 115 95ms 9 Dec 2025 503rd jtaxen 670 119 15ms 21 Oct 2024 503rd psbpsbp 670 119 9ms 19 Dec 2024 503rd klixel 🇨🇦 670 119 9ms 9 Apr 2025 503rd vhoulbreque 🇫🇷 670 119 9ms 21 Nov 2025 507th error256 669 101 6ms 24 Oct 2024 508th Yax42 🇫🇷 669 129 70ms 2 days ago 509th CaedenHarper 🇨🇦 666 140 692ms 3 Oct 2025 510th dbut2 🇦🇺 666 179 264ms 31 Oct 2024 511th emgordon154 665 111 4ms 12 Jan 2025 512th two-bad 🇬🇧 664 97 11ms 2 Oct 2024 512th LordSir101 664 97 13ms 10 Aug 2025 514th rniii 664 106 1ms 2 Oct 2024 514th gastropner 664 106 2ms 11 Feb 2025 516th TaserTheFox 🇺🇸 664 120 16ms 8 Oct 2024 516th yokasuretsu 664 120 10ms 26 Jan 2025 516th Troon 664 120 10ms 17 Feb 2025 516th keelimeguy 🇺🇸 664 120 16ms 14 Jun 2025 520th CaedenHarper 🇨🇦 663 100 412ms 22 Jul 2025 521st snoozingnewt 🇨🇦 662 180 268ms 2 Nov 2025 522nd 4hg 🇺🇸 661 59 34ms 5 Oct 2024 523rd DialFrost 🇸🇬 659 67 2ms 22 Dec 2024 524th BREMAUCY 🇫🇷 659 121 16ms 18 Jul 2025 525th xyangst 657 98 10ms 15 Oct 2024 525th BambooleanLogic 🇸🇪 657 98 10ms 21 Oct 2024 527th error256 657 142 154ms 31 May 2025 528th AlephSquirrel 657 146 4ms 14 May 2025 529th jwhear 🇺🇸 655 197 1,696ms 1 Oct 2024 530th chartung17 653 122 10ms 24 Mar 2025 531st w911 651 183 268ms 7 Oct 2024 532nd albanian-laundromat 651 293 14ms 8 Dec 2025 533rd Babafaba 650 102 498ms 11 Nov 2025 534th MeWhenI 🇻🇦 648 91 704ms 29 Aug 2025 535th msbranicky 648 123 17ms 3 Oct 2024 535th bobbysq 648 123 10ms 5 Oct 2024 535th wuzekai518 648 123 10ms 8 Oct 2024 538th rucin93 🇵🇱 648 144 143ms 28 Oct 2024 539th CaedenHarper 🇨🇦 644 100 13ms 22 Aug 2025 539th iczelia 🇩🇪 644 100 10ms 11 Oct 2025 539th Yax42 🇫🇷 644 100 10ms 27 Nov 2025 542nd koipondx86 644 123 2ms 8 Nov 2024 543rd tomh1012 643 111 424ms 8 Sep 2025 544th NotEvenIndian 643 124 10ms 22 Oct 2024 544th ridingqwerty 🇺🇸 643 124 16ms 16 Jan 2025 544th CommandLeo 🇮🇹 643 124 9ms 5 Oct 2025 547th Apataras 643 145 381ms 25 Jun 2025 548th Jonatan6 🇩🇰 640 110 2ms 24 Oct 2024 548th solisolu 640 110 2ms 25 Nov 2025 550th stefangimmillaro 639 73 281ms 1 Oct 2024 551st elgan65536 639 146 147ms 2 Oct 2024 551st dokutan 639 146 382ms 23 Nov 2025 551st luuumine 🇫🇷 639 146 146ms 26 Nov 2025 554th MeWhenI 🇻🇦 638 73 8ms 3 Oct 2024 555th bnic24 637 125 16ms 3 Oct 2024 555th adoxography 637 125 11ms 22 Oct 2024 555th wh3n3v3r 🇨🇿 637 125 10ms 18 Nov 2024 555th lelbal 637 125 9ms 14 Oct 2025 559th Yax42 🇫🇷 634 111 2ms 35 hours ago 560th msbranicky 634 188 296ms 7 Jan 2025 First Prev 481–560 of 858 Next Last