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 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 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 451st jipsong 🇩🇪 693 115 16ms 12 May 2025 451st snoozingnewt 🇺🇸 693 115 10ms 11 days ago 451st luuumine 🇫🇷 693 115 16ms 2 hours ago 454th Salutations45 692 93 9ms 17 Nov 2024 454th strattonwhisler 692 93 8ms 26 Mar 2025 456th Alex-x90 🇺🇸 692 124 366ms 1 Oct 2024 456th Herbert00709 🇵🇱 692 124 50ms 14 Jun 2025 458th NickTheEASDude 🇺🇸 690 115 3ms 17 Dec 2024 459th pardouin 🇫🇷 688 57 5ms 3 Oct 2024 460th Bmrl7 687 116 10ms 3 Oct 2024 460th rowechenzhong 687 116 10ms 17 Oct 2024 462nd MeWhenI 🇻🇦 686 68 223ms 2 Oct 2024 463rd Lv0Sys 🇵🇱 685 94 9ms 15 Jun 2025 464th error256 685 104 367ms 14 Oct 2024 465th madex 🇩🇪 683 103 2ms 2 Oct 2024 466th aDwarfNamedUrist 682 162 183ms 1 Sep 2025 467th dtbao20 🇻🇳 681 117 17ms 1 Oct 2024 467th Pyroan 681 117 16ms 22 Feb 2025 467th vgamula 🇺🇦 681 117 16ms 5 Aug 2025 467th FortuiteMan 🇫🇷 681 117 16ms 26 hours ago 471st CatsAreFluffy 680 53 50ms 27 Dec 2024 472nd Shanethegamer 🇺🇸 679 65 2ms 1 Oct 2024 473rd MeWhenI 🇻🇦 678 108 179ms 2 Oct 2024 474th the-zammers 678 163 140ms 1 Dec 2024 475th plcc0 676 37 70ms 6 Apr 2025 476th commandblockguy 🇺🇸 676 98 669ms 1 Sep 2025 477th BlankSpruce 676 104 2ms 1 Oct 2024 478th elgan65536 675 118 10ms 2 Oct 2024 478th logvp 675 118 18ms 6 Oct 2024 478th ahmetdemirag 🇨🇾 675 118 9ms 6 Feb 2025 478th plcc0 675 118 16ms 6 Apr 2025 478th KatieLG 🇬🇧 675 118 17ms 20 Apr 2025 478th dirckvdende 675 118 16ms 10 Jul 2025 484th jerrandolph 672 177 252ms 25 Sep 2025 484th CaedenHarper 🇨🇦 672 177 241ms 14 days ago 486th edsrzf 🇳🇿 671 99 2,289ms 5 Jul 2025 487th tailorspy 671 128 362ms 4 Oct 2024 488th Herbert00709 🇵🇱 670 105 2ms 14 Jun 2025 488th luuumine 🇫🇷 670 105 2ms 5 days ago 490th error256 669 101 4ms 24 Oct 2024 491st jtaxen 669 119 16ms 21 Oct 2024 491st psbpsbp 669 119 10ms 19 Dec 2024 491st klixel 🇨🇦 669 119 10ms 9 Apr 2025 491st vhoulbreque 🇫🇷 669 119 10ms 10 days ago 495th CaedenHarper 🇨🇦 666 140 336ms 3 Oct 2025 496th emgordon154 665 111 4ms 12 Jan 2025 497th dbut2 🇦🇺 665 179 261ms 31 Oct 2024 498th rniii 664 106 2ms 2 Oct 2024 498th gastropner 664 106 2ms 11 Feb 2025 500th TaserTheFox 🇺🇸 664 120 20ms 8 Oct 2024 500th yokasuretsu 664 120 11ms 26 Jan 2025 500th Troon 664 120 10ms 17 Feb 2025 500th keelimeguy 🇺🇸 664 120 16ms 14 Jun 2025 504th AlephSquirrel 664 146 4ms 14 May 2025 505th two-bad 🇬🇧 663 97 10ms 2 Oct 2024 505th LordSir101 663 97 8ms 10 Aug 2025 507th CaedenHarper 🇨🇦 663 100 574ms 22 Jul 2025 508th 4hg 🇺🇸 661 59 34ms 5 Oct 2024 509th snoozingnewt 🇺🇸 661 180 256ms 2 Nov 2025 510th DialFrost 🇸🇬 659 67 2ms 22 Dec 2024 511th BREMAUCY 🇫🇷 658 121 16ms 18 Jul 2025 512th xyangst 657 98 10ms 15 Oct 2024 512th BambooleanLogic 🇸🇪 657 98 10ms 21 Oct 2024 514th error256 657 142 159ms 31 May 2025 515th jwhear 🇺🇸 655 197 1,691ms 1 Oct 2024 516th chartung17 653 122 10ms 24 Mar 2025 517th Babafaba 650 102 406ms 21 days ago 518th w911 650 183 269ms 7 Oct 2024 519th msbranicky 648 123 15ms 3 Oct 2024 519th bobbysq 648 123 9ms 5 Oct 2024 519th wuzekai518 648 123 9ms 8 Oct 2024 522nd rucin93 🇵🇱 648 144 151ms 28 Oct 2024 523rd MeWhenI 🇻🇦 645 91 756ms 29 Aug 2025 524th koipondx86 645 123 2ms 8 Nov 2024 525th CaedenHarper 🇨🇦 643 100 9ms 22 Aug 2025 First Prev 451–525 of 834 Next Last