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 Shanethegamer 🇺🇸 693 41 3ms 4 Oct 2024 452nd jipsong 🇩🇪 693 115 16ms 12 May 2025 452nd snoozingnewt 🇺🇸 693 115 11ms 13 days ago 452nd luuumine 🇫🇷 693 115 18ms 27 hours ago 455th Salutations45 692 93 9ms 17 Nov 2024 455th strattonwhisler 692 93 8ms 26 Mar 2025 457th Alex-x90 🇺🇸 692 124 366ms 1 Oct 2024 457th Herbert00709 🇵🇱 692 124 50ms 14 Jun 2025 459th NickTheEASDude 🇺🇸 690 115 3ms 17 Dec 2024 460th pardouin 🇫🇷 688 57 5ms 3 Oct 2024 461st Bmrl7 687 116 10ms 3 Oct 2024 461st rowechenzhong 687 116 9ms 17 Oct 2024 463rd MeWhenI 🇻🇦 686 68 223ms 2 Oct 2024 464th Lv0Sys 🇵🇱 685 94 9ms 15 Jun 2025 465th error256 685 104 367ms 14 Oct 2024 466th madex 🇩🇪 683 103 2ms 2 Oct 2024 467th aDwarfNamedUrist 682 162 183ms 1 Sep 2025 468th dtbao20 🇻🇳 681 117 16ms 1 Oct 2024 468th Pyroan 681 117 16ms 22 Feb 2025 468th vgamula 🇺🇦 681 117 16ms 5 Aug 2025 468th FortuiteMan 🇫🇷 681 117 21ms 2 days ago 472nd CatsAreFluffy 680 53 50ms 27 Dec 2024 473rd Shanethegamer 🇺🇸 679 65 2ms 1 Oct 2024 474th MeWhenI 🇻🇦 678 108 179ms 2 Oct 2024 475th the-zammers 678 163 140ms 1 Dec 2024 476th plcc0 676 37 70ms 6 Apr 2025 477th commandblockguy 🇺🇸 676 98 476ms 1 Sep 2025 478th BlankSpruce 676 104 2ms 1 Oct 2024 479th elgan65536 675 118 10ms 2 Oct 2024 479th logvp 675 118 16ms 6 Oct 2024 479th ahmetdemirag 🇨🇾 675 118 13ms 6 Feb 2025 479th plcc0 675 118 15ms 6 Apr 2025 479th KatieLG 🇬🇧 675 118 17ms 20 Apr 2025 479th dirckvdende 675 118 15ms 10 Jul 2025 485th jerrandolph 673 177 258ms 25 Sep 2025 485th CaedenHarper 🇨🇦 673 177 270ms 15 days ago 487th edsrzf 🇳🇿 671 99 2,289ms 5 Jul 2025 488th tailorspy 671 128 362ms 4 Oct 2024 489th Herbert00709 🇵🇱 670 105 2ms 14 Jun 2025 489th luuumine 🇫🇷 670 105 2ms 6 days ago 491st error256 669 101 4ms 24 Oct 2024 492nd jtaxen 669 119 17ms 21 Oct 2024 492nd psbpsbp 669 119 11ms 19 Dec 2024 492nd klixel 🇨🇦 669 119 10ms 9 Apr 2025 492nd vhoulbreque 🇫🇷 669 119 11ms 11 days ago 496th CaedenHarper 🇨🇦 666 140 336ms 3 Oct 2025 497th dbut2 🇦🇺 666 179 256ms 31 Oct 2024 498th emgordon154 665 111 4ms 12 Jan 2025 499th rniii 664 106 2ms 2 Oct 2024 499th gastropner 664 106 2ms 11 Feb 2025 501st TaserTheFox 🇺🇸 664 120 17ms 8 Oct 2024 501st yokasuretsu 664 120 11ms 26 Jan 2025 501st Troon 664 120 10ms 17 Feb 2025 501st keelimeguy 🇺🇸 664 120 16ms 14 Jun 2025 505th AlephSquirrel 664 146 4ms 14 May 2025 506th two-bad 🇬🇧 663 97 10ms 2 Oct 2024 506th LordSir101 663 97 8ms 10 Aug 2025 508th CaedenHarper 🇨🇦 663 100 477ms 22 Jul 2025 509th snoozingnewt 🇺🇸 662 180 258ms 2 Nov 2025 510th 4hg 🇺🇸 661 59 34ms 5 Oct 2024 511th DialFrost 🇸🇬 659 67 2ms 22 Dec 2024 512th BREMAUCY 🇫🇷 658 121 17ms 18 Jul 2025 513th xyangst 657 98 10ms 15 Oct 2024 513th BambooleanLogic 🇸🇪 657 98 10ms 21 Oct 2024 515th error256 657 142 159ms 31 May 2025 516th jwhear 🇺🇸 655 197 1,691ms 1 Oct 2024 517th chartung17 653 122 9ms 24 Mar 2025 518th w911 651 183 257ms 7 Oct 2024 519th Babafaba 650 102 491ms 22 days ago 520th msbranicky 648 123 17ms 3 Oct 2024 520th bobbysq 648 123 10ms 5 Oct 2024 520th wuzekai518 648 123 10ms 8 Oct 2024 523rd rucin93 🇵🇱 648 144 149ms 28 Oct 2024 524th MeWhenI 🇻🇦 645 91 756ms 29 Aug 2025 525th koipondx86 645 123 2ms 8 Nov 2024 First Prev 451–525 of 835 Next Last