Card Number Validation in all languages in chars. Achievements Cheevos Holes Languages Medals Miscellaneous 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Multitap Input 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 Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus 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 Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang 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 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang 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 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Multitap Input 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 Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus 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 Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 559th mattyhempstead 616 105 26ms 7 Oct 2024 562nd bac0id 616 141 420ms 10 Jan 2025 563rd olleicua 🇺🇸 614 78 34ms 18 Oct 2024 564th evnu 612 147 87ms 12 Oct 2025 565th davecame 610 106 17ms 1 Oct 2024 565th starfihs 610 106 10ms 2 Oct 2024 565th rschwa6308 🇺🇸 610 106 16ms 28 Oct 2024 565th snydej 610 106 17ms 21 Nov 2024 565th andrewjc2000 610 106 17ms 17 Jul 2025 565th travisdoesmath 610 106 17ms 7 Sep 2025 571st Seanharrs 🇦🇺 610 117 471ms 15 Nov 2024 572nd not-a-pokemon 609 113 1ms 23 Jul 2025 573rd kaascevich 609 134 125ms 9 Jul 2025 574th daveberlin 608 106 10ms 27 Jun 2025 575th Shanethegamer 🇺🇸 606 154 156ms 3 Oct 2024 576th alemelis 605 93 467ms 1 Oct 2024 577th commandz0 🇺🇸 604 107 17ms 7 Oct 2024 577th zbreit 🇺🇸 604 107 16ms 29 Oct 2024 577th StardustGogeta 604 107 17ms 30 Oct 2024 577th ZakkkkAttackkkk 🇵🇭 604 107 16ms 8 Feb 2025 577th InigoK 🇺🇸 604 107 17ms 22 Sep 2025 577th Lv0Sys 🇵🇱 604 107 17ms 15 days ago 583rd jupj 🇫🇮 604 114 2ms 20 Jul 2025 584th albanian-laundromat 603 72 1ms 13 days ago 585th neihousaigaai 598 108 17ms 4 Oct 2024 585th StefanHabel 🇨🇦 598 108 15ms 23 Jan 2025 585th CaedenHarper 🇨🇦 598 108 17ms 22 Jul 2025 588th dokutan 598 116 2ms 19 Nov 2025 589th MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 590th MeWhenI 🇻🇦 595 73 2ms 2 Oct 2024 591st arcpolaris 595 120 396ms 28 Jan 2025 592nd SirBogman 🇺🇸 593 64 124ms 11 Jul 2025 593rd DialFrost 🇸🇬 588 67 9ms 25 Jan 2025 594th cros107 🇦🇺 588 110 17ms 1 Jan 2025 594th guilhem-roy 🇫🇷 588 110 17ms 29 May 2025 596th roguh 🇬🇹 588 117 1ms 13 Oct 2024 596th iczelia 🇩🇪 588 117 2ms 25 Sep 2025 598th JunkIce 587 98 416ms 3 Dec 2024 598th commandz0 🇺🇸 587 98 505ms 1 Sep 2025 600th Schmitt-Very-Cool 587 159 445ms 26 Sep 2025 601st dokutan 587 174 5ms 21 Feb 2025 602nd gigaprofisi 🇺🇸 586 110 10ms 11 Aug 2025 603rd amazingalek 🇳🇴 585 122 458ms 1 Jan 2026 604th mousetail 🇳🇱 582 111 17ms 6 Oct 2024 605th CaedenHarper 🇨🇦 581 99 425ms 34 hours ago 606th michelebastione 🇮🇹 580 123 418ms 26 Aug 2025 607th emgordon154 579 49 3ms 9 Dec 2025 608th MeWhenI 🇻🇦 578 111 88ms 2 Oct 2024 609th bac0id 578 119 2ms 10 Jan 2025 610th OllieBoyne 🇬🇧 577 112 17ms 17 Oct 2024 610th WillConker 577 112 12ms 22 Oct 2024 610th maxgodfrey2004 🇨🇦 577 112 10ms 4 Jan 2025 613th MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 614th 823126 575 112 9ms 13 Nov 2024 614th snoozingnewt 🇨🇦 575 112 10ms 2 Nov 2025 616th KatieLG 🇬🇧 574 99 1,368ms 1 Oct 2024 617th dokutan 571 101 859ms 16 days ago 618th Mabeloid 🇳🇴 569 121 1ms 21 Oct 2025 619th MeWhenI 🇻🇦 569 164 197ms 6 Oct 2024 620th janAkali 🇷🇺 567 147 373ms 7 hours ago 621st jipsong 🇩🇪 562 115 16ms 12 May 2025 622nd aliakseikalosha 562 127 456ms 10 Oct 2024 623rd dokutan 561 155 423ms 27 days ago 624th jgbaldwinbrown 560 123 2ms 14 Jan 2026 625th ravnskjaer 🇩🇰 559 167 455ms 15 Dec 2025 626th rowechenzhong 557 116 10ms 17 Oct 2024 627th CaedenHarper 🇨🇦 555 104 1,139ms 24 Nov 2025 628th madex 🇩🇪 555 116 10ms 1 Oct 2024 629th FortuiteMan 🇫🇷 554 270 36ms 22 Nov 2025 630th MeWhenI 🇻🇦 554 290 8ms 2 Oct 2024 631st JDiLenarda 🇫🇷 553 165 1,573ms 1 Oct 2024 632nd dtbao20 🇻🇳 552 117 18ms 1 Oct 2024 632nd Pyroan 552 117 17ms 22 Feb 2025 632nd vgamula 🇺🇦 552 117 16ms 5 Aug 2025 632nd FortuiteMan 🇫🇷 552 117 17ms 1 Dec 2025 632nd yujqiao 552 117 17ms 16 Dec 2025 637th snoozingnewt 🇨🇦 552 148 122ms 20 Nov 2025 638th msbranicky 552 185 4ms 20 Jan 2025 639th edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 640th gpikmddk 549 130 464ms 30 Oct 2025 First Prev 561–640 of 906 Next Last