Card Number Validation in all languages in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 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 Tower of Hanoi Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 Erlang 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 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 Erlang 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 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 Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 450th snoozingnewt 🇺🇸 692 115 11ms 2 hours ago 452nd Alex-x90 🇺🇸 692 124 381ms 1 Oct 2024 452nd Herbert00709 🇵🇱 692 124 56ms 14 Jun 2025 454th NickTheEASDude 🇺🇸 690 115 3ms 17 Dec 2024 455th pardouin 🇫🇷 688 57 5ms 3 Oct 2024 456th MeWhenI 🇻🇦 686 68 254ms 2 Oct 2024 457th Bmrl7 686 116 10ms 3 Oct 2024 457th rowechenzhong 686 116 10ms 17 Oct 2024 459th error256 685 104 386ms 14 Oct 2024 460th Lv0Sys 🇵🇱 684 94 9ms 15 Jun 2025 461st aDwarfNamedUrist 682 162 183ms 1 Sep 2025 462nd madex 🇩🇪 681 103 2ms 2 Oct 2024 463rd dtbao20 🇻🇳 681 117 17ms 1 Oct 2024 463rd Pyroan 681 117 16ms 22 Feb 2025 463rd vgamula 🇺🇦 681 117 16ms 5 Aug 2025 466th CatsAreFluffy 680 53 52ms 27 Dec 2024 467th Shanethegamer 🇺🇸 679 65 2ms 1 Oct 2024 468th MeWhenI 🇻🇦 678 108 179ms 2 Oct 2024 469th the-zammers 678 163 140ms 1 Dec 2024 470th plcc0 676 37 70ms 6 Apr 2025 471st commandblockguy 🇺🇸 675 98 669ms 1 Sep 2025 472nd BlankSpruce 675 104 2ms 1 Oct 2024 473rd elgan65536 675 118 10ms 2 Oct 2024 473rd logvp 675 118 18ms 6 Oct 2024 473rd ahmetdemirag 🇨🇾 675 118 9ms 6 Feb 2025 473rd plcc0 675 118 16ms 6 Apr 2025 473rd KatieLG 🇬🇧 675 118 17ms 20 Apr 2025 473rd dirckvdende 675 118 16ms 10 Jul 2025 479th jerrandolph 672 177 252ms 25 Sep 2025 479th CaedenHarper 🇨🇦 672 177 241ms 2 days ago 481st edsrzf 🇳🇿 671 99 2,289ms 5 Jul 2025 482nd tailorspy 671 128 362ms 4 Oct 2024 483rd error256 669 101 4ms 24 Oct 2024 484th jtaxen 669 119 16ms 21 Oct 2024 484th psbpsbp 669 119 10ms 19 Dec 2024 484th klixel 🇨🇦 669 119 10ms 9 Apr 2025 487th Herbert00709 🇵🇱 668 105 2ms 14 Jun 2025 488th CaedenHarper 🇨🇦 666 140 336ms 3 Oct 2025 489th emgordon154 665 111 4ms 12 Jan 2025 490th dbut2 🇦🇺 665 179 265ms 31 Oct 2024 491st TaserTheFox 🇺🇸 664 120 20ms 8 Oct 2024 491st yokasuretsu 664 120 11ms 26 Jan 2025 491st Troon 664 120 10ms 17 Feb 2025 491st keelimeguy 🇺🇸 664 120 16ms 14 Jun 2025 495th AlephSquirrel 664 146 4ms 14 May 2025 496th two-bad 🇬🇧 663 97 10ms 2 Oct 2024 496th LordSir101 663 97 9ms 10 Aug 2025 498th rniii 662 106 2ms 2 Oct 2024 498th gastropner 662 106 2ms 11 Feb 2025 500th 4hg 🇺🇸 661 59 34ms 5 Oct 2024 501st CaedenHarper 🇨🇦 661 100 574ms 22 Jul 2025 502nd snoozingnewt 🇺🇸 661 180 256ms 17 days ago 503rd DialFrost 🇸🇬 659 67 2ms 22 Dec 2024 504th BREMAUCY 🇫🇷 658 121 16ms 18 Jul 2025 505th xyangst 656 98 10ms 15 Oct 2024 505th BambooleanLogic 🇸🇪 656 98 9ms 21 Oct 2024 507th error256 656 142 159ms 31 May 2025 508th jwhear 🇺🇸 655 197 1,691ms 1 Oct 2024 509th chartung17 653 122 10ms 24 Mar 2025 510th w911 650 183 271ms 7 Oct 2024 511th Babafaba 648 102 406ms 9 days ago 512th msbranicky 647 123 15ms 3 Oct 2024 512th bobbysq 647 123 9ms 5 Oct 2024 512th wuzekai518 647 123 9ms 8 Oct 2024 512th vhoulbreque 🇫🇷 647 123 9ms 4 Feb 2025 516th rucin93 🇵🇱 646 144 151ms 28 Oct 2024 517th MeWhenI 🇻🇦 645 91 756ms 29 Aug 2025 518th koipondx86 645 123 2ms 8 Nov 2024 519th CaedenHarper 🇨🇦 643 100 10ms 22 Aug 2025 519th iczelia 🇩🇪 643 100 9ms 11 Oct 2025 521st Apataras 643 145 302ms 25 Jun 2025 522nd NotEvenIndian 642 124 10ms 22 Oct 2024 522nd ridingqwerty 🇺🇸 642 124 16ms 16 Jan 2025 522nd CommandLeo 🇮🇹 642 124 10ms 5 Oct 2025 525th tomh1012 641 111 395ms 8 Sep 2025 First Prev 451–525 of 819 Next Last