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 Crossword 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 Crossword 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 598th wobblybits 581 137 17ms 17 Aug 2025 602nd Mabeloid 🇳🇴 580 121 2ms 21 Oct 2025 603rd michelebastione 🇮🇹 579 123 402ms 26 Aug 2025 604th MeWhenI 🇻🇦 576 331 16ms 2 Oct 2024 605th albanian-laundromat 574 77 2ms 15 days ago 606th KatieLG 🇬🇧 574 99 1,081ms 1 Oct 2024 607th 823126 574 112 9ms 13 Nov 2024 607th dokutan 574 112 8ms 22 Jun 2025 607th snoozingnewt 🇺🇸 574 112 9ms 15 days ago 610th scpchicken 🇵🇼 573 139 16ms 6 Oct 2024 611th NanduBC 569 140 10ms 1 Oct 2024 611th jmerle 🇳🇱 569 140 10ms 10 Jan 2025 611th RobertHoeh 569 140 9ms 3 Mar 2025 611th smilesformiles3 569 140 15ms 12 Jun 2025 611th artem-aramma 569 140 16ms 18 Jun 2025 616th MeWhenI 🇻🇦 568 164 209ms 6 Oct 2024 617th snoozingnewt 🇺🇸 565 117 496ms 15 days ago 618th FranklinJiaChen 565 141 10ms 2 Oct 2024 619th KatieLG 🇬🇧 562 85 36ms 12 Jan 2025 620th aliakseikalosha 561 127 354ms 10 Oct 2024 621st brimstonetrader 561 142 10ms 17 Oct 2024 621st codewrite 🇬🇧 561 142 13ms 5 May 2025 621st RobGLambert 561 142 16ms 8 Jun 2025 624th CaedenHarper 🇨🇦 559 105 733ms 27 Sep 2025 625th GeneralFabian 557 143 9ms 9 Dec 2024 625th CutSandstone 557 143 9ms 30 Jan 2025 625th kistlerf 🇨🇭 557 143 16ms 19 May 2025 628th albanian-laundromat 556 343 56ms 17 Oct 2025 629th madex 🇩🇪 555 116 9ms 1 Oct 2024 630th MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 631st hiichbindermax 553 144 15ms 2 Oct 2024 631st mathisfun271 553 144 9ms 14 Oct 2024 631st bob-th 553 144 10ms 22 Oct 2024 634th JDiLenarda 🇫🇷 553 165 1,278ms 1 Oct 2024 635th KatieLG 🇬🇧 551 120 585ms 1 Oct 2024 636th edsrzf 🇳🇿 551 135 4ms 27 Feb 2025 637th msbranicky 550 185 4ms 20 Jan 2025 638th JunkIce 549 145 10ms 3 Dec 2024 638th Flekay 🇩🇪 549 145 10ms 10 Jul 2025 640th mousetail 🇳🇱 548 128 2ms 3 Oct 2024 641st gpikmddk 548 130 339ms 19 days ago 642nd emgordon154 546 52 2ms 3 Nov 2024 643rd zakariamouhid 545 118 10ms 1 Oct 2024 644th croc54 545 146 11ms 15 Dec 2024 645th najs91 544 131 382ms 15 Oct 2024 645th bac0id 544 131 375ms 9 Jan 2025 645th CaedenHarper 🇨🇦 544 131 377ms 17 Oct 2025 648th xyangst 544 171 171ms 1 Oct 2024 649th dokutan 542 122 459ms 19 Oct 2024 650th PyryL 🇫🇮 542 147 10ms 1 Mar 2025 651st eranws 541 119 9ms 23 Dec 2024 652nd Sciman101 539 147 2ms 26 Mar 2025 653rd mbittner20 538 148 9ms 13 Oct 2024 654th psaban 534 149 16ms 31 Jul 2025 655th deancureton 532 121 10ms 30 Dec 2024 656th msbranicky 532 175 162ms 13 Dec 2024 657th FlorianCassayre 🇫🇷 531 150 17ms 1 Oct 2024 657th jameswmccarty 531 150 9ms 5 Oct 2024 657th yousefalizadeh 531 150 10ms 23 Oct 2024 657th feherd 531 150 12ms 31 Oct 2024 657th TheZwierzLF 🇵🇱 531 150 10ms 17 May 2025 657th kadamkaustubh 531 150 9ms 10 days ago 663rd msbranicky 527 126 2,985ms 9 Jan 2025 664th adamnielson42 🇺🇸 524 152 9ms 6 Oct 2024 664th voidgloom 524 152 10ms 22 Oct 2024 664th omero-san 524 152 9ms 22 Sep 2025 664th brochmann 🇸🇪 524 152 10ms 12 Oct 2025 668th Macweese 524 178 308ms 3 Aug 2025 669th galloj 🇨🇿 522 112 27ms 4 Oct 2024 670th xyangst 520 153 10ms 1 Oct 2024 670th denisfouchard 520 153 11ms 21 Aug 2025 672nd snoozingnewt 🇺🇸 519 213 119ms 15 days ago 673rd bac0id 518 180 306ms 9 Jan 2025 674th osNiko 🇧🇷 517 154 22ms 21 Aug 2025 675th sidok 515 109 276ms 13 Nov 2024 First Prev 601–675 of 819 Next Last