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 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers 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 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 526th Shanethegamer 🇺🇸 631 74 223ms 16 Oct 2024 527th XenThe 🇬🇧 631 102 8ms 7 Jul 2025 528th msbranicky 631 188 276ms 7 Jan 2025 529th CatsAreFluffy 627 127 18ms 30 Oct 2024 529th WillowWispy 627 127 11ms 25 May 2025 531st DialFrost 🇸🇬 627 304 159ms 13 Aug 2025 532nd AlephSquirrel 625 40 48ms 1 Oct 2024 533rd dokutan 622 127 2ms 10 Dec 2024 534th Lv0Sys 🇵🇱 622 128 19ms 15 Jun 2025 535th not-a-pokemon 620 113 2ms 23 Jul 2025 536th BalaM314 618 104 10ms 4 Feb 2025 536th acollett89 618 104 9ms 15 Jul 2025 538th HumanoidCPU 618 107 490ms 17 Feb 2025 539th codereport 🇨🇦 617 63 34ms 2 Oct 2024 540th madex 🇩🇪 617 129 18ms 2 Oct 2024 540th RedzGoose 🇦🇺 617 129 11ms 15 Oct 2024 540th calebaitken 617 129 10ms 11 Apr 2025 543rd MarcMush 🇫🇷 615 91 746ms 8 Oct 2024 544th jupj 🇫🇮 615 114 2ms 20 Jul 2025 545th Ripick 615 135 390ms 23 Mar 2025 546th Europe2048 612 130 11ms 2 Oct 2024 546th nstearns96 🇬🇧 612 130 16ms 2 Oct 2024 546th rollershutter 612 130 11ms 10 Jan 2025 546th Stockoh 🇫🇷 612 130 18ms 4 Jul 2025 546th luuumine 🇫🇷 612 130 17ms 15 days ago 551st bac0id 609 141 433ms 10 Jan 2025 552nd inverseLorentz 🇦🇺 608 131 11ms 7 Oct 2024 552nd dokutan 608 131 10ms 19 Oct 2024 552nd sciencejiho 608 131 19ms 11 Feb 2025 552nd Jaydosu 608 131 10ms 11 Apr 2025 552nd snoozingnewt 🇺🇸 608 131 10ms 16 days ago 557th HumanoidCPU 607 106 12ms 7 Mar 2025 557th daveberlin 607 106 10ms 27 Jun 2025 559th MeWhenI 🇻🇦 607 111 88ms 2 Oct 2024 560th Seanharrs 607 117 405ms 15 Nov 2024 561st emgordon154 606 156 10ms 13 Dec 2024 562nd evnu 605 147 345ms 11 days ago 563rd kaascevich 604 134 155ms 9 Jul 2025 564th MeWhenI 🇻🇦 603 73 2ms 2 Oct 2024 565th Shanethegamer 🇺🇸 603 154 175ms 3 Oct 2024 566th alemelis 602 93 485ms 1 Oct 2024 567th roguh 🇬🇹 599 117 2ms 13 Oct 2024 567th iczelia 🇩🇪 599 117 3ms 25 Sep 2025 569th Mabeloid 🇳🇴 599 133 11ms 2 Oct 2024 569th Emutis 🇱🇹 599 133 11ms 4 Feb 2025 571st dokutan 598 117 2ms 3 Oct 2024 572nd MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 573rd dokutan 595 159 7ms 19 Oct 2024 574th arcpolaris 592 120 358ms 28 Jan 2025 575th SirBogman 🇺🇸 591 64 133ms 11 Jul 2025 576th Babafaba 590 112 651ms 8 days ago 577th RaBa21 🇭🇺 590 135 17ms 19 Jul 2025 578th tatzyr 🇯🇵 589 81 36ms 23 Dec 2024 579th bac0id 589 119 2ms 10 Jan 2025 580th DialFrost 🇸🇬 586 67 9ms 25 Jan 2025 581st gigaprofisi 🇺🇸 585 110 10ms 11 Aug 2025 582nd sciencedjinn 585 136 10ms 8 Nov 2024 582nd ihatethefrench 585 136 18ms 4 Jan 2025 584th dokutan 584 174 5ms 21 Feb 2025 585th h3ra993huskp 🇯🇵 583 159 398ms 25 Nov 2024 585th Schmitt-Very-Cool 583 159 460ms 26 days ago 587th olleicua 🇺🇸 582 82 33ms 18 Oct 2024 588th Trip-kun 581 136 2ms 5 Oct 2024 589th kurkale6ka 581 137 22ms 16 Oct 2024 589th 4ndyJ 🇬🇧 581 137 11ms 14 Nov 2024 589th Mikey-Beep 🇬🇧 581 137 16ms 6 Aug 2025 589th wobblybits 581 137 21ms 17 Aug 2025 593rd Mabeloid 🇳🇴 579 121 2ms 2 days ago 594th michelebastione 🇮🇹 577 123 402ms 26 Aug 2025 595th MeWhenI 🇻🇦 576 331 18ms 2 Oct 2024 596th 823126 574 112 10ms 13 Nov 2024 596th dokutan 574 112 10ms 22 Jun 2025 598th scpchicken 🇵🇼 573 139 20ms 6 Oct 2024 599th KatieLG 🇬🇧 572 99 1,081ms 1 Oct 2024 600th NanduBC 569 140 10ms 1 Oct 2024 First Prev 526–600 of 783 Next Last