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 aDwarfNamedUrist 684 162 138ms 1 Sep 2025 482nd CatsAreFluffy 683 53 49ms 27 Dec 2024 483rd MeWhenI 🇻🇦 681 108 141ms 2 Oct 2024 484th dtbao20 🇻🇳 681 117 16ms 1 Oct 2024 484th Pyroan 681 117 16ms 22 Feb 2025 484th vgamula 🇺🇦 681 117 19ms 5 Aug 2025 484th FortuiteMan 🇫🇷 681 117 20ms 1 Dec 2025 484th yujqiao 681 117 16ms 16 Dec 2025 489th the-zammers 680 163 149ms 1 Dec 2024 490th Shanethegamer 🇺🇸 679 65 2ms 1 Oct 2024 491st BlankSpruce 677 104 2ms 1 Oct 2024 492nd plcc0 676 37 69ms 6 Apr 2025 493rd commandblockguy 🇺🇸 676 98 483ms 1 Sep 2025 494th elgan65536 675 118 10ms 2 Oct 2024 494th logvp 675 118 15ms 6 Oct 2024 494th ahmetdemirag 🇨🇾 675 118 9ms 6 Feb 2025 494th dirckvdende 675 118 19ms 10 Jul 2025 498th tailorspy 675 128 403ms 4 Oct 2024 499th edsrzf 🇳🇿 673 99 2,321ms 5 Jul 2025 500th jerrandolph 673 177 257ms 25 Sep 2025 500th CaedenHarper 🇨🇦 673 177 247ms 17 Nov 2025 502nd Herbert00709 🇵🇱 671 105 2ms 14 Jun 2025 503rd emgordon154 670 115 138ms 9 Dec 2025 504th jtaxen 670 119 15ms 21 Oct 2024 504th psbpsbp 670 119 9ms 19 Dec 2024 504th klixel 🇨🇦 670 119 9ms 9 Apr 2025 504th vhoulbreque 🇫🇷 670 119 9ms 21 Nov 2025 508th error256 669 101 6ms 24 Oct 2024 509th Yax42 🇫🇷 669 129 70ms 7 days ago 510th CaedenHarper 🇨🇦 666 140 692ms 3 Oct 2025 511th dbut2 🇦🇺 666 179 236ms 31 Oct 2024 512th emgordon154 665 111 4ms 12 Jan 2025 513th two-bad 🇬🇧 664 97 10ms 2 Oct 2024 513th LordSir101 664 97 9ms 10 Aug 2025 515th rniii 664 106 1ms 2 Oct 2024 515th gastropner 664 106 2ms 11 Feb 2025 517th TaserTheFox 🇺🇸 664 120 16ms 8 Oct 2024 517th yokasuretsu 664 120 10ms 26 Jan 2025 517th Troon 664 120 10ms 17 Feb 2025 517th keelimeguy 🇺🇸 664 120 16ms 14 Jun 2025 521st CaedenHarper 🇨🇦 663 100 412ms 22 Jul 2025 522nd snoozingnewt 🇨🇦 662 180 243ms 2 Nov 2025 523rd 4hg 🇺🇸 661 59 34ms 5 Oct 2024 524th DialFrost 🇸🇬 659 67 2ms 22 Dec 2024 525th BREMAUCY 🇫🇷 659 121 16ms 18 Jul 2025 526th xyangst 657 98 10ms 15 Oct 2024 526th BambooleanLogic 🇸🇪 657 98 10ms 21 Oct 2024 528th error256 657 142 154ms 31 May 2025 529th AlephSquirrel 657 146 4ms 14 May 2025 530th jwhear 🇺🇸 655 197 1,696ms 1 Oct 2024 531st chartung17 653 122 10ms 24 Mar 2025 532nd w911 651 183 251ms 7 Oct 2024 533rd albanian-laundromat 651 293 14ms 8 Dec 2025 534th Babafaba 650 102 486ms 11 Nov 2025 535th MeWhenI 🇻🇦 648 91 704ms 29 Aug 2025 536th msbranicky 648 123 17ms 3 Oct 2024 536th bobbysq 648 123 10ms 5 Oct 2024 536th wuzekai518 648 123 10ms 8 Oct 2024 539th rucin93 🇵🇱 648 144 143ms 28 Oct 2024 540th CaedenHarper 🇨🇦 644 100 9ms 22 Aug 2025 540th iczelia 🇩🇪 644 100 9ms 11 Oct 2025 540th Yax42 🇫🇷 644 100 10ms 27 Nov 2025 543rd koipondx86 644 123 2ms 8 Nov 2024 544th tomh1012 643 111 539ms 8 Sep 2025 545th NotEvenIndian 643 124 10ms 22 Oct 2024 545th ridingqwerty 🇺🇸 643 124 16ms 16 Jan 2025 545th CommandLeo 🇮🇹 643 124 9ms 5 Oct 2025 548th Apataras 643 145 381ms 25 Jun 2025 549th Jonatan6 🇩🇰 640 110 2ms 24 Oct 2024 549th solisolu 640 110 2ms 25 Nov 2025 551st stefangimmillaro 639 73 331ms 1 Oct 2024 552nd elgan65536 639 146 147ms 2 Oct 2024 552nd dokutan 639 146 382ms 23 Nov 2025 552nd luuumine 🇫🇷 639 146 146ms 26 Nov 2025 555th MeWhenI 🇻🇦 638 73 8ms 3 Oct 2024 556th bnic24 638 125 16ms 3 Oct 2024 556th adoxography 638 125 11ms 22 Oct 2024 556th wh3n3v3r 🇨🇿 638 125 10ms 18 Nov 2024 556th lelbal 638 125 9ms 14 Oct 2025 560th Yax42 🇫🇷 635 111 2ms 7 days ago First Prev 481–560 of 865 Next Last