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 526th Jonatan6 🇩🇰 638 110 2ms 24 Oct 2024 527th elgan65536 638 146 152ms 2 Oct 2024 528th Yax42 🇫🇷 637 101 9ms 5 Sep 2025 529th bnic24 637 125 23ms 3 Oct 2024 529th adoxography 637 125 12ms 22 Oct 2024 529th wh3n3v3r 🇨🇿 637 125 11ms 18 Nov 2024 529th lelbal 637 125 10ms 14 Oct 2025 529th snoozingnewt 🇺🇸 637 125 10ms 9 days ago 534th msbranicky 633 188 250ms 7 Jan 2025 535th Shanethegamer 🇺🇸 631 74 223ms 16 Oct 2024 536th XenThe 🇬🇧 631 102 9ms 7 Jul 2025 537th albanian-laundromat 631 264 843ms 8 days ago 538th CatsAreFluffy 627 127 18ms 30 Oct 2024 538th WillowWispy 627 127 11ms 25 May 2025 540th DialFrost 🇸🇬 627 304 152ms 13 Aug 2025 541st AlephSquirrel 625 40 48ms 1 Oct 2024 542nd dokutan 623 127 2ms 10 Dec 2024 543rd Lv0Sys 🇵🇱 622 128 19ms 15 Jun 2025 544th not-a-pokemon 621 113 2ms 23 Jul 2025 545th codereport 🇨🇦 619 63 34ms 2 Oct 2024 546th BalaM314 619 104 9ms 4 Feb 2025 546th acollett89 619 104 12ms 15 Jul 2025 548th HumanoidCPU 618 107 490ms 17 Feb 2025 549th MarcMush 🇫🇷 617 91 746ms 8 Oct 2024 550th madex 🇩🇪 617 129 18ms 2 Oct 2024 550th RedzGoose 🇦🇺 617 129 11ms 15 Oct 2024 550th calebaitken 617 129 10ms 11 Apr 2025 553rd Ripick 617 135 340ms 23 Mar 2025 554th jupj 🇫🇮 616 114 2ms 20 Jul 2025 555th Europe2048 613 130 11ms 2 Oct 2024 555th nstearns96 🇬🇧 613 130 16ms 2 Oct 2024 555th rollershutter 613 130 11ms 10 Jan 2025 555th Stockoh 🇫🇷 613 130 18ms 4 Jul 2025 555th luuumine 🇫🇷 613 130 17ms 8 Oct 2025 560th evnu 612 147 304ms 12 Oct 2025 561st Seanharrs 609 117 405ms 15 Nov 2024 562nd bac0id 609 141 368ms 10 Jan 2025 563rd inverseLorentz 🇦🇺 608 131 11ms 7 Oct 2024 563rd dokutan 608 131 10ms 19 Oct 2024 563rd sciencejiho 608 131 19ms 11 Feb 2025 563rd Jaydosu 608 131 10ms 11 Apr 2025 563rd Emutis 🇱🇹 608 131 11ms 78 mins ago 568th HumanoidCPU 607 106 9ms 7 Mar 2025 568th daveberlin 607 106 10ms 27 Jun 2025 570th MeWhenI 🇻🇦 607 111 79ms 2 Oct 2024 571st kaascevich 607 134 122ms 9 Jul 2025 572nd emgordon154 606 156 10ms 13 Dec 2024 573rd MeWhenI 🇻🇦 605 73 2ms 2 Oct 2024 574th alemelis 604 93 485ms 1 Oct 2024 575th Shanethegamer 🇺🇸 604 154 142ms 3 Oct 2024 576th roguh 🇬🇹 600 117 2ms 13 Oct 2024 576th iczelia 🇩🇪 600 117 3ms 25 Sep 2025 578th Mabeloid 🇳🇴 599 133 11ms 2 Oct 2024 579th dokutan 598 117 2ms 3 Oct 2024 580th MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 581st dokutan 595 159 7ms 19 Oct 2024 582nd arcpolaris 593 120 358ms 28 Jan 2025 583rd SirBogman 🇺🇸 591 64 133ms 11 Jul 2025 584th tatzyr 🇯🇵 590 81 36ms 23 Dec 2024 585th bac0id 590 119 2ms 10 Jan 2025 586th RaBa21 🇭🇺 590 135 17ms 19 Jul 2025 587th DialFrost 🇸🇬 586 67 9ms 25 Jan 2025 588th sciencedjinn 586 136 10ms 8 Nov 2024 588th ihatethefrench 586 136 18ms 4 Jan 2025 590th gigaprofisi 🇺🇸 585 110 9ms 11 Aug 2025 591st h3ra993huskp 🇯🇵 584 159 295ms 25 Nov 2024 591st Schmitt-Very-Cool 584 159 339ms 26 Sep 2025 593rd dokutan 584 174 5ms 21 Feb 2025 594th olleicua 🇺🇸 582 82 33ms 18 Oct 2024 595th Trip-kun 582 136 2ms 5 Oct 2024 596th kurkale6ka 581 137 22ms 16 Oct 2024 596th 4ndyJ 🇬🇧 581 137 11ms 14 Nov 2024 596th Mikey-Beep 🇬🇧 581 137 16ms 6 Aug 2025 596th wobblybits 581 137 21ms 17 Aug 2025 600th Mabeloid 🇳🇴 580 121 2ms 21 days ago First Prev 526–600 of 814 Next Last