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 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 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 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 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 451st aDwarfNamedUrist 682 162 183ms 1 Sep 2025 452nd madex 🇩🇪 681 103 2ms 2 Oct 2024 453rd CatsAreFluffy 680 53 55ms 27 Dec 2024 454th dtbao20 🇻🇳 680 117 18ms 1 Oct 2024 454th Pyroan 680 117 17ms 22 Feb 2025 454th vgamula 🇺🇦 680 117 22ms 5 Aug 2025 457th Shanethegamer 🇺🇸 679 65 2ms 1 Oct 2024 458th MeWhenI 🇻🇦 678 108 179ms 2 Oct 2024 459th the-zammers 678 163 140ms 1 Dec 2024 460th plcc0 676 37 70ms 6 Apr 2025 461st commandblockguy 🇺🇸 675 98 669ms 1 Sep 2025 462nd elgan65536 675 118 11ms 2 Oct 2024 462nd logvp 675 118 19ms 6 Oct 2024 462nd ahmetdemirag 🇨🇾 675 118 10ms 6 Feb 2025 462nd plcc0 675 118 18ms 6 Apr 2025 462nd KatieLG 🇬🇧 675 118 18ms 20 Apr 2025 462nd dirckvdende 675 118 21ms 10 Jul 2025 468th BlankSpruce 674 104 2ms 1 Oct 2024 469th jerrandolph 672 177 269ms 25 Sep 2025 470th edsrzf 🇳🇿 671 99 3,049ms 5 Jul 2025 471st tailorspy 671 128 417ms 4 Oct 2024 472nd error256 669 101 4ms 24 Oct 2024 473rd jtaxen 669 119 18ms 21 Oct 2024 473rd psbpsbp 669 119 14ms 19 Dec 2024 473rd klixel 🇨🇦 669 119 11ms 9 Apr 2025 476th Herbert00709 🇵🇱 668 105 2ms 14 Jun 2025 477th dbut2 🇦🇺 665 179 283ms 31 Oct 2024 478th AlephSquirrel 664 146 4ms 14 May 2025 479th two-bad 🇬🇧 663 97 9ms 2 Oct 2024 479th LordSir101 663 97 11ms 10 Aug 2025 481st TaserTheFox 🇺🇸 663 120 19ms 8 Oct 2024 481st yokasuretsu 663 120 11ms 26 Jan 2025 481st Troon 663 120 9ms 17 Feb 2025 481st keelimeguy 🇺🇸 663 120 17ms 14 Jun 2025 485th CaedenHarper 🇨🇦 663 140 630ms 3 Oct 2025 486th CaedenHarper 🇨🇦 661 100 574ms 22 Jul 2025 487th rniii 661 106 2ms 2 Oct 2024 487th gastropner 661 106 2ms 11 Feb 2025 489th snoozingnewt 🇺🇸 661 180 242ms 25 mins ago 490th 4hg 🇺🇸 659 59 34ms 5 Oct 2024 491st DialFrost 🇸🇬 659 67 2ms 22 Dec 2024 492nd emgordon154 659 111 5ms 12 Jan 2025 493rd BREMAUCY 🇫🇷 658 121 20ms 18 Jul 2025 494th xyangst 656 98 11ms 15 Oct 2024 494th BambooleanLogic 🇸🇪 656 98 10ms 21 Oct 2024 496th error256 656 142 156ms 31 May 2025 497th MeWhenI 🇻🇦 654 142 508ms 2 Oct 2024 498th chartung17 653 122 10ms 24 Mar 2025 498th Babafaba 653 122 21ms 18 days ago 500th w911 650 183 275ms 7 Oct 2024 501st albanian-laundromat 648 102 433ms 16 days ago 502nd msbranicky 647 123 17ms 3 Oct 2024 502nd bobbysq 647 123 11ms 5 Oct 2024 502nd wuzekai518 647 123 11ms 8 Oct 2024 502nd vhoulbreque 🇫🇷 647 123 14ms 4 Feb 2025 506th jwhear 🇺🇸 647 197 1,861ms 1 Oct 2024 507th rucin93 🇵🇱 646 144 145ms 28 Oct 2024 508th MeWhenI 🇻🇦 645 91 921ms 29 Aug 2025 509th koipondx86 644 123 2ms 8 Nov 2024 510th CaedenHarper 🇨🇦 643 100 9ms 22 Aug 2025 510th iczelia 🇩🇪 643 100 10ms 22 days ago 512th CaedenHarper 🇨🇦 643 185 289ms 3 Jan 2025 513th NotEvenIndian 642 124 11ms 22 Oct 2024 513th ridingqwerty 🇺🇸 642 124 17ms 16 Jan 2025 513th CommandLeo 🇮🇹 642 124 11ms 5 Oct 2025 516th tomh1012 641 111 395ms 8 Sep 2025 517th Apataras 640 145 589ms 25 Jun 2025 518th stefangimmillaro 639 73 277ms 1 Oct 2024 519th MeWhenI 🇻🇦 638 73 8ms 3 Oct 2024 520th elgan65536 638 146 152ms 2 Oct 2024 521st Yax42 🇫🇷 637 101 9ms 5 Sep 2025 522nd Jonatan6 🇩🇰 637 110 2ms 24 Oct 2024 523rd bnic24 637 125 23ms 3 Oct 2024 523rd adoxography 637 125 12ms 22 Oct 2024 523rd wh3n3v3r 🇨🇿 637 125 11ms 18 Nov 2024 First Prev 451–525 of 807 Next Last