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 error256 685 104 386ms 14 Oct 2024 452nd Lv0Sys 🇵🇱 684 94 11ms 15 Jun 2025 453rd aDwarfNamedUrist 682 162 183ms 1 Sep 2025 454th madex 🇩🇪 681 103 2ms 2 Oct 2024 455th dtbao20 🇻🇳 681 117 18ms 1 Oct 2024 455th Pyroan 681 117 17ms 22 Feb 2025 455th vgamula 🇺🇦 681 117 22ms 5 Aug 2025 458th CatsAreFluffy 680 53 55ms 27 Dec 2024 459th Shanethegamer 🇺🇸 679 65 2ms 1 Oct 2024 460th MeWhenI 🇻🇦 678 108 179ms 2 Oct 2024 461st the-zammers 678 163 140ms 1 Dec 2024 462nd plcc0 676 37 70ms 6 Apr 2025 463rd commandblockguy 🇺🇸 675 98 669ms 1 Sep 2025 464th BlankSpruce 675 104 2ms 1 Oct 2024 465th elgan65536 675 118 11ms 2 Oct 2024 465th logvp 675 118 19ms 6 Oct 2024 465th ahmetdemirag 🇨🇾 675 118 10ms 6 Feb 2025 465th plcc0 675 118 18ms 6 Apr 2025 465th KatieLG 🇬🇧 675 118 18ms 20 Apr 2025 465th dirckvdende 675 118 21ms 10 Jul 2025 471st jerrandolph 672 177 269ms 25 Sep 2025 472nd edsrzf 🇳🇿 671 99 2,289ms 5 Jul 2025 473rd tailorspy 671 128 417ms 4 Oct 2024 474th error256 669 101 4ms 24 Oct 2024 475th jtaxen 669 119 18ms 21 Oct 2024 475th psbpsbp 669 119 14ms 19 Dec 2024 475th klixel 🇨🇦 669 119 11ms 9 Apr 2025 478th Herbert00709 🇵🇱 668 105 2ms 14 Jun 2025 479th dbut2 🇦🇺 665 179 283ms 31 Oct 2024 480th TaserTheFox 🇺🇸 664 120 19ms 8 Oct 2024 480th yokasuretsu 664 120 11ms 26 Jan 2025 480th Troon 664 120 9ms 17 Feb 2025 480th keelimeguy 🇺🇸 664 120 17ms 14 Jun 2025 484th AlephSquirrel 664 146 4ms 14 May 2025 485th two-bad 🇬🇧 663 97 9ms 2 Oct 2024 485th LordSir101 663 97 11ms 10 Aug 2025 487th CaedenHarper 🇨🇦 663 140 529ms 3 Oct 2025 488th rniii 662 106 2ms 2 Oct 2024 488th gastropner 662 106 2ms 11 Feb 2025 490th CaedenHarper 🇨🇦 661 100 574ms 22 Jul 2025 491st snoozingnewt 🇺🇸 661 180 242ms 2 days ago 492nd 4hg 🇺🇸 659 59 34ms 5 Oct 2024 493rd DialFrost 🇸🇬 659 67 2ms 22 Dec 2024 494th emgordon154 659 111 5ms 12 Jan 2025 495th BREMAUCY 🇫🇷 658 121 20ms 18 Jul 2025 496th xyangst 656 98 11ms 15 Oct 2024 496th BambooleanLogic 🇸🇪 656 98 10ms 21 Oct 2024 498th error256 656 142 156ms 31 May 2025 499th MeWhenI 🇻🇦 654 142 508ms 2 Oct 2024 500th chartung17 653 122 10ms 24 Mar 2025 500th Babafaba 653 122 21ms 20 days ago 502nd w911 650 183 275ms 7 Oct 2024 503rd msbranicky 647 123 17ms 3 Oct 2024 503rd bobbysq 647 123 11ms 5 Oct 2024 503rd wuzekai518 647 123 11ms 8 Oct 2024 503rd vhoulbreque 🇫🇷 647 123 14ms 4 Feb 2025 507th jwhear 🇺🇸 647 197 1,861ms 1 Oct 2024 508th rucin93 🇵🇱 646 144 145ms 28 Oct 2024 509th MeWhenI 🇻🇦 645 91 921ms 29 Aug 2025 510th koipondx86 644 123 2ms 8 Nov 2024 511th CaedenHarper 🇨🇦 643 100 9ms 22 Aug 2025 511th iczelia 🇩🇪 643 100 10ms 24 days ago 513th CaedenHarper 🇨🇦 643 185 289ms 3 Jan 2025 514th NotEvenIndian 642 124 11ms 22 Oct 2024 514th ridingqwerty 🇺🇸 642 124 17ms 16 Jan 2025 514th CommandLeo 🇮🇹 642 124 11ms 5 Oct 2025 517th tomh1012 641 111 395ms 8 Sep 2025 518th Apataras 640 145 405ms 25 Jun 2025 519th stefangimmillaro 639 73 277ms 1 Oct 2024 520th MeWhenI 🇻🇦 638 73 8ms 3 Oct 2024 521st Jonatan6 🇩🇰 638 110 2ms 24 Oct 2024 522nd elgan65536 638 146 152ms 2 Oct 2024 523rd Yax42 🇫🇷 637 101 9ms 5 Sep 2025 524th bnic24 637 125 23ms 3 Oct 2024 524th adoxography 637 125 12ms 22 Oct 2024 First Prev 451–525 of 809 Next Last