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 MeWhenI 🇻🇦 686 68 254ms 2 Oct 2024 452nd Bmrl7 686 116 11ms 3 Oct 2024 452nd rowechenzhong 686 116 13ms 17 Oct 2024 454th error256 685 104 386ms 14 Oct 2024 455th Lv0Sys 🇵🇱 684 94 11ms 15 Jun 2025 456th aDwarfNamedUrist 682 162 183ms 1 Sep 2025 457th madex 🇩🇪 681 103 2ms 2 Oct 2024 458th dtbao20 🇻🇳 681 117 18ms 1 Oct 2024 458th Pyroan 681 117 17ms 22 Feb 2025 458th vgamula 🇺🇦 681 117 22ms 5 Aug 2025 461st CatsAreFluffy 680 53 55ms 27 Dec 2024 462nd Shanethegamer 🇺🇸 679 65 2ms 1 Oct 2024 463rd MeWhenI 🇻🇦 678 108 179ms 2 Oct 2024 464th the-zammers 678 163 140ms 1 Dec 2024 465th plcc0 676 37 70ms 6 Apr 2025 466th commandblockguy 🇺🇸 675 98 669ms 1 Sep 2025 467th BlankSpruce 675 104 2ms 1 Oct 2024 468th elgan65536 675 118 11ms 2 Oct 2024 468th logvp 675 118 19ms 6 Oct 2024 468th ahmetdemirag 🇨🇾 675 118 10ms 6 Feb 2025 468th plcc0 675 118 18ms 6 Apr 2025 468th KatieLG 🇬🇧 675 118 18ms 20 Apr 2025 468th dirckvdende 675 118 21ms 10 Jul 2025 474th jerrandolph 672 177 252ms 25 Sep 2025 475th edsrzf 🇳🇿 671 99 2,289ms 5 Jul 2025 476th tailorspy 671 128 362ms 4 Oct 2024 477th error256 669 101 4ms 24 Oct 2024 478th jtaxen 669 119 18ms 21 Oct 2024 478th psbpsbp 669 119 14ms 19 Dec 2024 478th klixel 🇨🇦 669 119 11ms 9 Apr 2025 481st Herbert00709 🇵🇱 668 105 2ms 14 Jun 2025 482nd dbut2 🇦🇺 665 179 265ms 31 Oct 2024 483rd TaserTheFox 🇺🇸 664 120 19ms 8 Oct 2024 483rd yokasuretsu 664 120 11ms 26 Jan 2025 483rd Troon 664 120 9ms 17 Feb 2025 483rd keelimeguy 🇺🇸 664 120 17ms 14 Jun 2025 487th AlephSquirrel 664 146 4ms 14 May 2025 488th two-bad 🇬🇧 663 97 9ms 2 Oct 2024 488th LordSir101 663 97 11ms 10 Aug 2025 490th CaedenHarper 🇨🇦 663 140 336ms 3 Oct 2025 491st rniii 662 106 2ms 2 Oct 2024 491st gastropner 662 106 2ms 11 Feb 2025 493rd 4hg 🇺🇸 661 59 34ms 5 Oct 2024 494th CaedenHarper 🇨🇦 661 100 574ms 22 Jul 2025 495th snoozingnewt 🇺🇸 661 180 256ms 5 days ago 496th DialFrost 🇸🇬 659 67 2ms 22 Dec 2024 497th emgordon154 659 111 5ms 12 Jan 2025 498th BREMAUCY 🇫🇷 658 121 20ms 18 Jul 2025 499th xyangst 656 98 11ms 15 Oct 2024 499th BambooleanLogic 🇸🇪 656 98 10ms 21 Oct 2024 501st error256 656 142 156ms 31 May 2025 502nd jwhear 🇺🇸 655 197 1,691ms 1 Oct 2024 503rd chartung17 653 122 10ms 24 Mar 2025 503rd Babafaba 653 122 21ms 24 days ago 505th w911 650 183 271ms 7 Oct 2024 506th msbranicky 647 123 17ms 3 Oct 2024 506th bobbysq 647 123 11ms 5 Oct 2024 506th wuzekai518 647 123 11ms 8 Oct 2024 506th vhoulbreque 🇫🇷 647 123 14ms 4 Feb 2025 510th rucin93 🇵🇱 646 144 145ms 28 Oct 2024 511th MeWhenI 🇻🇦 645 91 756ms 29 Aug 2025 512th koipondx86 644 123 2ms 8 Nov 2024 513th CaedenHarper 🇨🇦 643 100 9ms 22 Aug 2025 513th iczelia 🇩🇪 643 100 10ms 11 Oct 2025 515th CaedenHarper 🇨🇦 643 185 249ms 3 Jan 2025 516th NotEvenIndian 642 124 11ms 22 Oct 2024 516th ridingqwerty 🇺🇸 642 124 17ms 16 Jan 2025 516th CommandLeo 🇮🇹 642 124 11ms 5 Oct 2025 519th tomh1012 641 111 395ms 8 Sep 2025 520th Apataras 640 145 302ms 25 Jun 2025 521st stefangimmillaro 639 73 277ms 1 Oct 2024 522nd MeWhenI 🇻🇦 638 73 8ms 3 Oct 2024 523rd Jonatan6 🇩🇰 638 110 2ms 24 Oct 2024 524th elgan65536 638 146 152ms 2 Oct 2024 525th Yax42 🇫🇷 637 101 9ms 5 Sep 2025 First Prev 451–525 of 812 Next Last