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 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 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 Alex-x90 🇺🇸 692 124 381ms 1 Oct 2024 451st Herbert00709 🇵🇱 692 124 56ms 14 Jun 2025 453rd NickTheEASDude 🇺🇸 690 115 3ms 17 Dec 2024 454th pardouin 🇫🇷 688 57 5ms 3 Oct 2024 455th MeWhenI 🇻🇦 686 68 254ms 2 Oct 2024 456th Bmrl7 686 116 11ms 3 Oct 2024 456th rowechenzhong 686 116 13ms 17 Oct 2024 458th error256 685 104 386ms 14 Oct 2024 459th Lv0Sys 🇵🇱 684 94 9ms 15 Jun 2025 460th aDwarfNamedUrist 682 162 183ms 1 Sep 2025 461st madex 🇩🇪 681 103 2ms 2 Oct 2024 462nd dtbao20 🇻🇳 681 117 18ms 1 Oct 2024 462nd Pyroan 681 117 17ms 22 Feb 2025 462nd vgamula 🇺🇦 681 117 22ms 5 Aug 2025 465th CatsAreFluffy 680 53 52ms 27 Dec 2024 466th Shanethegamer 🇺🇸 679 65 2ms 1 Oct 2024 467th MeWhenI 🇻🇦 678 108 179ms 2 Oct 2024 468th the-zammers 678 163 140ms 1 Dec 2024 469th plcc0 676 37 70ms 6 Apr 2025 470th commandblockguy 🇺🇸 675 98 669ms 1 Sep 2025 471st BlankSpruce 675 104 2ms 1 Oct 2024 472nd elgan65536 675 118 11ms 2 Oct 2024 472nd logvp 675 118 19ms 6 Oct 2024 472nd ahmetdemirag 🇨🇾 675 118 10ms 6 Feb 2025 472nd plcc0 675 118 18ms 6 Apr 2025 472nd KatieLG 🇬🇧 675 118 18ms 20 Apr 2025 472nd dirckvdende 675 118 21ms 10 Jul 2025 478th jerrandolph 672 177 252ms 25 Sep 2025 479th edsrzf 🇳🇿 671 99 2,289ms 5 Jul 2025 480th tailorspy 671 128 362ms 4 Oct 2024 481st error256 669 101 4ms 24 Oct 2024 482nd jtaxen 669 119 18ms 21 Oct 2024 482nd psbpsbp 669 119 14ms 19 Dec 2024 482nd klixel 🇨🇦 669 119 11ms 9 Apr 2025 485th Herbert00709 🇵🇱 668 105 2ms 14 Jun 2025 486th emgordon154 665 111 5ms 12 Jan 2025 487th dbut2 🇦🇺 665 179 265ms 31 Oct 2024 488th TaserTheFox 🇺🇸 664 120 19ms 8 Oct 2024 488th yokasuretsu 664 120 11ms 26 Jan 2025 488th Troon 664 120 9ms 17 Feb 2025 488th keelimeguy 🇺🇸 664 120 17ms 14 Jun 2025 492nd AlephSquirrel 664 146 4ms 14 May 2025 493rd two-bad 🇬🇧 663 97 10ms 2 Oct 2024 493rd LordSir101 663 97 9ms 10 Aug 2025 495th CaedenHarper 🇨🇦 663 140 336ms 3 Oct 2025 496th rniii 662 106 2ms 2 Oct 2024 496th gastropner 662 106 2ms 11 Feb 2025 498th 4hg 🇺🇸 661 59 34ms 5 Oct 2024 499th CaedenHarper 🇨🇦 661 100 574ms 22 Jul 2025 500th snoozingnewt 🇺🇸 661 180 256ms 10 days ago 501st DialFrost 🇸🇬 659 67 2ms 22 Dec 2024 502nd BREMAUCY 🇫🇷 658 121 20ms 18 Jul 2025 503rd xyangst 656 98 10ms 15 Oct 2024 503rd BambooleanLogic 🇸🇪 656 98 9ms 21 Oct 2024 505th error256 656 142 159ms 31 May 2025 506th jwhear 🇺🇸 655 197 1,691ms 1 Oct 2024 507th chartung17 653 122 10ms 24 Mar 2025 508th w911 650 183 271ms 7 Oct 2024 509th Babafaba 648 102 406ms 47 hours ago 510th msbranicky 647 123 17ms 3 Oct 2024 510th bobbysq 647 123 11ms 5 Oct 2024 510th wuzekai518 647 123 11ms 8 Oct 2024 510th vhoulbreque 🇫🇷 647 123 14ms 4 Feb 2025 514th rucin93 🇵🇱 646 144 152ms 28 Oct 2024 515th MeWhenI 🇻🇦 645 91 756ms 29 Aug 2025 516th koipondx86 645 123 2ms 8 Nov 2024 517th CaedenHarper 🇨🇦 643 100 10ms 22 Aug 2025 517th iczelia 🇩🇪 643 100 9ms 11 Oct 2025 519th CaedenHarper 🇨🇦 643 185 249ms 3 Jan 2025 520th NotEvenIndian 642 124 11ms 22 Oct 2024 520th ridingqwerty 🇺🇸 642 124 17ms 16 Jan 2025 520th CommandLeo 🇮🇹 642 124 11ms 5 Oct 2025 523rd tomh1012 641 111 395ms 8 Sep 2025 524th Apataras 640 145 302ms 25 Jun 2025 525th stefangimmillaro 639 73 277ms 1 Oct 2024 First Prev 451–525 of 816 Next Last