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 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 Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers 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 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 Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 451st CatsAreFluffy 680 53 54ms 27 Dec 2024 452nd dtbao20 🇻🇳 680 117 18ms 1 Oct 2024 452nd Pyroan 680 117 17ms 22 Feb 2025 452nd vgamula 🇺🇦 680 117 22ms 5 Aug 2025 455th aDwarfNamedUrist 679 162 183ms 1 Sep 2025 456th Shanethegamer 🇺🇸 678 65 2ms 1 Oct 2024 457th plcc0 676 37 70ms 6 Apr 2025 458th commandblockguy 🇺🇸 675 98 669ms 1 Sep 2025 459th elgan65536 675 118 11ms 2 Oct 2024 459th logvp 675 118 19ms 6 Oct 2024 459th ahmetdemirag 🇨🇾 675 118 10ms 6 Feb 2025 459th plcc0 675 118 18ms 6 Apr 2025 459th KatieLG 🇬🇧 675 118 18ms 20 Apr 2025 459th dirckvdende 675 118 21ms 10 Jul 2025 465th the-zammers 675 163 140ms 1 Dec 2024 466th BlankSpruce 674 104 2ms 1 Oct 2024 467th MeWhenI 🇻🇦 673 108 179ms 2 Oct 2024 468th edsrzf 🇳🇿 671 99 5 Jul 2025 469th tailorspy 671 128 417ms 4 Oct 2024 470th jerrandolph 671 177 269ms 26 days ago 471st jtaxen 669 119 21 Oct 2024 471st psbpsbp 669 119 14ms 19 Dec 2024 471st klixel 🇨🇦 669 119 11ms 9 Apr 2025 474th error256 668 101 24 Oct 2024 475th Herbert00709 🇵🇱 668 105 2ms 14 Jun 2025 476th AlephSquirrel 664 146 4ms 14 May 2025 477th two-bad 🇬🇧 663 97 9ms 2 Oct 2024 477th LordSir101 663 97 11ms 10 Aug 2025 479th TaserTheFox 🇺🇸 663 120 19ms 8 Oct 2024 479th yokasuretsu 663 120 11ms 26 Jan 2025 479th Troon 663 120 9ms 17 Feb 2025 479th keelimeguy 🇺🇸 663 120 17ms 14 Jun 2025 483rd dbut2 🇦🇺 663 179 283ms 31 Oct 2024 484th CaedenHarper 🇨🇦 662 140 390ms 18 days ago 485th CaedenHarper 🇨🇦 661 100 574ms 22 Jul 2025 486th rniii 661 106 2ms 2 Oct 2024 486th gastropner 661 106 2ms 11 Feb 2025 488th 4hg 🇺🇸 659 59 5 Oct 2024 489th emgordon154 659 111 5ms 12 Jan 2025 490th DialFrost 🇸🇬 658 67 2ms 22 Dec 2024 491st BREMAUCY 🇫🇷 658 121 20ms 18 Jul 2025 492nd xyangst 656 98 11ms 15 Oct 2024 492nd BambooleanLogic 🇸🇪 656 98 10ms 21 Oct 2024 494th error256 654 142 172ms 31 May 2025 495th chartung17 653 122 10ms 24 Mar 2025 495th Babafaba 653 122 6 days ago 497th MeWhenI 🇻🇦 653 142 368ms 2 Oct 2024 498th w911 649 183 325ms 7 Oct 2024 499th albanian-laundromat 648 102 5 days ago 500th msbranicky 647 123 17ms 3 Oct 2024 500th bobbysq 647 123 11ms 5 Oct 2024 500th wuzekai518 647 123 11ms 8 Oct 2024 500th vhoulbreque 🇫🇷 647 123 14ms 4 Feb 2025 504th jwhear 🇺🇸 647 197 1,861ms 1 Oct 2024 505th MeWhenI 🇻🇦 645 91 903ms 29 Aug 2025 506th rucin93 🇵🇱 645 144 187ms 28 Oct 2024 507th CaedenHarper 🇨🇦 643 100 9ms 22 Aug 2025 507th iczelia 🇩🇪 643 100 10ms 11 days ago 509th koipondx86 642 123 2ms 8 Nov 2024 510th NotEvenIndian 642 124 11ms 22 Oct 2024 510th ridingqwerty 🇺🇸 642 124 17ms 16 Jan 2025 510th CommandLeo 🇮🇹 642 124 11ms 16 days ago 513th CaedenHarper 🇨🇦 642 185 297ms 3 Jan 2025 514th tomh1012 640 111 395ms 8 Sep 2025 515th stefangimmillaro 639 73 277ms 1 Oct 2024 516th Apataras 639 145 395ms 25 Jun 2025 517th MeWhenI 🇻🇦 638 73 8ms 3 Oct 2024 518th Yax42 🇫🇷 637 101 9ms 5 Sep 2025 519th Jonatan6 🇩🇰 637 110 2ms 24 Oct 2024 520th bnic24 637 125 23ms 3 Oct 2024 520th adoxography 637 125 12ms 22 Oct 2024 520th wh3n3v3r 🇨🇿 637 125 11ms 18 Nov 2024 520th lelbal 637 125 10ms 8 days ago 524th elgan65536 636 146 186ms 2 Oct 2024 525th Shanethegamer 🇺🇸 631 74 223ms 16 Oct 2024 First Prev 451–525 of 783 Next Last