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 526th elgan65536 636 146 152ms 2 Oct 2024 527th Shanethegamer 🇺🇸 631 74 223ms 16 Oct 2024 528th XenThe 🇬🇧 631 102 8ms 7 Jul 2025 529th msbranicky 631 188 276ms 7 Jan 2025 530th CatsAreFluffy 627 127 18ms 30 Oct 2024 530th WillowWispy 627 127 11ms 25 May 2025 532nd DialFrost 🇸🇬 627 304 159ms 13 Aug 2025 533rd AlephSquirrel 625 40 48ms 1 Oct 2024 534th dokutan 622 127 2ms 10 Dec 2024 535th Lv0Sys 🇵🇱 622 128 19ms 15 Jun 2025 536th not-a-pokemon 620 113 2ms 23 Jul 2025 537th BalaM314 618 104 10ms 4 Feb 2025 537th acollett89 618 104 9ms 15 Jul 2025 539th HumanoidCPU 618 107 490ms 17 Feb 2025 540th codereport 🇨🇦 617 63 34ms 2 Oct 2024 541st madex 🇩🇪 617 129 18ms 2 Oct 2024 541st RedzGoose 🇦🇺 617 129 11ms 15 Oct 2024 541st calebaitken 617 129 10ms 11 Apr 2025 544th MarcMush 🇫🇷 615 91 746ms 8 Oct 2024 545th jupj 🇫🇮 615 114 2ms 20 Jul 2025 546th Ripick 615 135 355ms 23 Mar 2025 547th Europe2048 612 130 11ms 2 Oct 2024 547th nstearns96 🇬🇧 612 130 16ms 2 Oct 2024 547th rollershutter 612 130 11ms 10 Jan 2025 547th Stockoh 🇫🇷 612 130 18ms 4 Jul 2025 547th luuumine 🇫🇷 612 130 17ms 25 days ago 552nd bac0id 609 141 433ms 10 Jan 2025 553rd Seanharrs 608 117 405ms 15 Nov 2024 554th inverseLorentz 🇦🇺 608 131 11ms 7 Oct 2024 554th dokutan 608 131 10ms 19 Oct 2024 554th sciencejiho 608 131 19ms 11 Feb 2025 554th Jaydosu 608 131 10ms 11 Apr 2025 558th HumanoidCPU 607 106 12ms 7 Mar 2025 558th daveberlin 607 106 10ms 27 Jun 2025 560th MeWhenI 🇻🇦 607 111 79ms 2 Oct 2024 561st emgordon154 606 156 10ms 13 Dec 2024 562nd evnu 605 147 345ms 21 days ago 563rd kaascevich 604 134 155ms 9 Jul 2025 564th MeWhenI 🇻🇦 603 73 2ms 2 Oct 2024 565th Shanethegamer 🇺🇸 603 154 142ms 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 593 120 358ms 28 Jan 2025 575th SirBogman 🇺🇸 591 64 133ms 11 Jul 2025 576th Babafaba 590 112 651ms 18 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 albanian-laundromat 587 284 845ms 5 days ago 581st DialFrost 🇸🇬 586 67 9ms 25 Jan 2025 582nd gigaprofisi 🇺🇸 585 110 10ms 11 Aug 2025 583rd sciencedjinn 585 136 10ms 8 Nov 2024 583rd ihatethefrench 585 136 18ms 4 Jan 2025 585th dokutan 584 174 5ms 21 Feb 2025 586th h3ra993huskp 🇯🇵 583 159 336ms 25 Nov 2024 586th Schmitt-Very-Cool 583 159 370ms 26 Sep 2025 588th olleicua 🇺🇸 582 82 33ms 18 Oct 2024 589th Trip-kun 581 136 2ms 5 Oct 2024 590th kurkale6ka 581 137 22ms 16 Oct 2024 590th 4ndyJ 🇬🇧 581 137 11ms 14 Nov 2024 590th Mikey-Beep 🇬🇧 581 137 16ms 6 Aug 2025 590th wobblybits 581 137 21ms 17 Aug 2025 594th Mabeloid 🇳🇴 579 121 2ms 12 days ago 595th michelebastione 🇮🇹 578 123 402ms 26 Aug 2025 596th MeWhenI 🇻🇦 576 331 18ms 2 Oct 2024 597th 823126 574 112 10ms 13 Nov 2024 597th dokutan 574 112 10ms 22 Jun 2025 599th scpchicken 🇵🇼 573 139 20ms 6 Oct 2024 600th KatieLG 🇬🇧 572 99 1,081ms 1 Oct 2024 First Prev 526–600 of 785 Next Last