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 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input 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 ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel 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 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input 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 525th jared-hughes 615 105 15ms 3 Oct 2024 525th mattyhempstead 615 105 27ms 7 Oct 2024 528th olleicua 🇺🇸 612 78 40ms 18 Oct 2024 529th evnu 612 147 78ms 12 Oct 2025 530th bac0id 611 141 591ms 10 Jan 2025 531st davecame 609 106 15ms 1 Oct 2024 531st starfihs 609 106 10ms 2 Oct 2024 531st rschwa6308 🇺🇸 609 106 16ms 28 Oct 2024 531st snydej 609 106 15ms 21 Nov 2024 531st andrewjc2000 609 106 15ms 17 Jul 2025 531st travisdoesmath 609 106 16ms 7 Sep 2025 537th Seanharrs 609 117 470ms 15 Nov 2024 538th kaascevich 609 134 121ms 9 Jul 2025 539th daveberlin 607 106 9ms 27 Jun 2025 540th not-a-pokemon 607 113 2ms 23 Jul 2025 541st Shanethegamer 🇺🇸 606 154 145ms 3 Oct 2024 542nd MeWhenI 🇻🇦 605 73 2ms 2 Oct 2024 543rd alemelis 604 93 536ms 1 Oct 2024 544th commandblockguy 🇺🇸 604 107 15ms 7 Oct 2024 544th zbreit 🇺🇸 604 107 16ms 29 Oct 2024 544th StardustGogeta 604 107 16ms 30 Oct 2024 544th ZakkkkAttackkkk 🇵🇭 604 107 16ms 8 Feb 2025 544th InigoK 🇺🇸 604 107 16ms 22 Sep 2025 549th jupj 🇫🇮 601 114 2ms 20 Jul 2025 550th neihousaigaai 598 108 16ms 4 Oct 2024 550th StefanHabel 🇨🇦 598 108 16ms 23 Jan 2025 550th CaedenHarper 🇨🇦 598 108 16ms 22 Jul 2025 553rd MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 554th dokutan 596 116 2ms 19 Nov 2025 555th arcpolaris 593 120 351ms 28 Jan 2025 556th SirBogman 🇺🇸 591 64 184ms 11 Jul 2025 557th JunkIce 587 98 346ms 3 Dec 2024 557th commandblockguy 🇺🇸 587 98 471ms 1 Sep 2025 559th cros107 🇦🇺 587 110 16ms 1 Jan 2025 559th guilhem-roy 🇫🇷 587 110 17ms 29 May 2025 559th Lv0Sys 🇵🇱 587 110 17ms 7 days ago 562nd DialFrost 🇸🇬 586 67 8ms 25 Jan 2025 563rd roguh 🇬🇹 586 117 1ms 13 Oct 2024 563rd iczelia 🇩🇪 586 117 2ms 25 Sep 2025 565th Schmitt-Very-Cool 586 159 440ms 26 Sep 2025 566th gigaprofisi 🇺🇸 585 110 10ms 11 Aug 2025 567th dokutan 584 174 5ms 21 Feb 2025 568th Trip-kun 583 136 2ms 5 Oct 2024 569th mousetail 🇳🇱 582 111 16ms 6 Oct 2024 570th emgordon154 579 49 3ms 8 days ago 571st michelebastione 🇮🇹 579 123 404ms 26 Aug 2025 572nd dokutan 578 102 785ms 30 Aug 2025 573rd MeWhenI 🇻🇦 578 111 88ms 2 Oct 2024 574th OllieBoyne 🇬🇧 577 112 16ms 17 Oct 2024 574th WillConker 577 112 10ms 22 Oct 2024 574th maxgodfrey2004 🇨🇦 577 112 10ms 4 Jan 2025 577th bac0id 576 119 2ms 10 Jan 2025 578th MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 579th CaedenHarper 🇨🇦 575 100 454ms 22 Jul 2025 580th 823126 575 112 8ms 13 Nov 2024 580th snoozingnewt 🇨🇦 575 112 9ms 2 Nov 2025 582nd albanian-laundromat 574 77 2ms 3 Nov 2025 583rd KatieLG 🇬🇧 574 99 1,081ms 1 Oct 2024 584th MeWhenI 🇻🇦 569 164 181ms 6 Oct 2024 585th CaedenHarper 🇨🇦 567 104 730ms 23 days ago 586th Mabeloid 🇳🇴 567 121 1ms 21 Oct 2025 587th jipsong 🇩🇪 562 115 17ms 12 May 2025 588th aliakseikalosha 561 127 414ms 10 Oct 2024 589th ravnskjaer 🇩🇰 558 167 332ms 2 days ago 590th rowechenzhong 557 116 9ms 17 Oct 2024 591st madex 🇩🇪 555 116 9ms 1 Oct 2024 592nd FortuiteMan 🇫🇷 554 270 38ms 25 days ago 593rd MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 594th JDiLenarda 🇫🇷 553 165 1,344ms 1 Oct 2024 595th dtbao20 🇻🇳 552 117 16ms 1 Oct 2024 595th Pyroan 552 117 16ms 22 Feb 2025 595th vgamula 🇺🇦 552 117 19ms 5 Aug 2025 595th FortuiteMan 🇫🇷 552 117 20ms 16 days ago 595th yujqiao 552 117 18ms 29 hours ago 600th snoozingnewt 🇨🇦 552 148 122ms 27 days ago First Prev 526–600 of 845 Next Last