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 526th olleicua 🇺🇸 612 78 33ms 18 Oct 2024 527th evnu 612 147 78ms 12 Oct 2025 528th bac0id 610 141 369ms 10 Jan 2025 529th davecame 609 106 15ms 1 Oct 2024 529th starfihs 609 106 10ms 2 Oct 2024 529th rschwa6308 🇺🇸 609 106 16ms 28 Oct 2024 529th snydej 609 106 15ms 21 Nov 2024 529th andrewjc2000 609 106 15ms 17 Jul 2025 529th travisdoesmath 609 106 16ms 7 Sep 2025 535th Seanharrs 609 117 411ms 15 Nov 2024 536th kaascevich 609 134 124ms 9 Jul 2025 537th daveberlin 607 106 9ms 27 Jun 2025 538th not-a-pokemon 607 113 2ms 23 Jul 2025 539th Shanethegamer 🇺🇸 606 154 216ms 3 Oct 2024 540th MeWhenI 🇻🇦 605 73 2ms 2 Oct 2024 541st alemelis 604 93 452ms 1 Oct 2024 542nd commandblockguy 🇺🇸 604 107 15ms 7 Oct 2024 542nd zbreit 🇺🇸 604 107 16ms 29 Oct 2024 542nd StardustGogeta 604 107 16ms 30 Oct 2024 542nd ZakkkkAttackkkk 🇵🇭 604 107 16ms 8 Feb 2025 542nd InigoK 🇺🇸 604 107 16ms 22 Sep 2025 547th jupj 🇫🇮 601 114 2ms 20 Jul 2025 548th neihousaigaai 598 108 16ms 4 Oct 2024 548th StefanHabel 🇨🇦 598 108 16ms 23 Jan 2025 548th CaedenHarper 🇨🇦 598 108 16ms 22 Jul 2025 551st MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 552nd dokutan 596 116 2ms 21 days ago 553rd arcpolaris 593 120 347ms 28 Jan 2025 554th SirBogman 🇺🇸 591 64 184ms 11 Jul 2025 555th JunkIce 587 98 346ms 3 Dec 2024 555th commandblockguy 🇺🇸 587 98 471ms 1 Sep 2025 557th cros107 🇦🇺 587 110 16ms 1 Jan 2025 557th guilhem-roy 🇫🇷 587 110 17ms 29 May 2025 557th Lv0Sys 🇵🇱 587 110 18ms 18 hours ago 560th DialFrost 🇸🇬 586 67 8ms 25 Jan 2025 561st roguh 🇬🇹 586 117 1ms 13 Oct 2024 561st iczelia 🇩🇪 586 117 2ms 25 Sep 2025 563rd Schmitt-Very-Cool 586 159 440ms 26 Sep 2025 564th gigaprofisi 🇺🇸 585 110 10ms 11 Aug 2025 565th dokutan 584 174 5ms 21 Feb 2025 566th Trip-kun 583 136 2ms 5 Oct 2024 567th mousetail 🇳🇱 582 111 16ms 6 Oct 2024 568th emgordon154 579 49 3ms 35 hours ago 569th michelebastione 🇮🇹 579 123 375ms 26 Aug 2025 570th dokutan 578 102 785ms 30 Aug 2025 571st MeWhenI 🇻🇦 578 111 88ms 2 Oct 2024 572nd OllieBoyne 🇬🇧 577 112 16ms 17 Oct 2024 572nd WillConker 577 112 10ms 22 Oct 2024 572nd maxgodfrey2004 🇨🇦 577 112 10ms 4 Jan 2025 575th bac0id 576 119 2ms 10 Jan 2025 576th MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 577th CaedenHarper 🇨🇦 575 100 454ms 22 Jul 2025 578th 823126 575 112 8ms 13 Nov 2024 578th snoozingnewt 🇨🇦 575 112 9ms 2 Nov 2025 580th albanian-laundromat 574 77 2ms 3 Nov 2025 581st KatieLG 🇬🇧 574 99 1,081ms 1 Oct 2024 582nd MeWhenI 🇻🇦 569 164 285ms 6 Oct 2024 583rd CaedenHarper 🇨🇦 567 104 730ms 17 days ago 584th blaztoma 🇱🇹 567 114 16ms 25 Sep 2025 585th Mabeloid 🇳🇴 567 121 1ms 21 Oct 2025 586th jipsong 🇩🇪 562 115 17ms 12 May 2025 587th aliakseikalosha 561 127 401ms 10 Oct 2024 588th rowechenzhong 557 116 9ms 17 Oct 2024 589th madex 🇩🇪 555 116 9ms 1 Oct 2024 590th FortuiteMan 🇫🇷 554 270 37ms 18 days ago 591st MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 592nd JDiLenarda 🇫🇷 553 165 1,278ms 1 Oct 2024 593rd dtbao20 🇻🇳 552 117 16ms 1 Oct 2024 593rd Pyroan 552 117 16ms 22 Feb 2025 593rd vgamula 🇺🇦 552 117 19ms 5 Aug 2025 593rd FortuiteMan 🇫🇷 552 117 20ms 9 days ago 597th snoozingnewt 🇨🇦 552 148 124ms 20 days ago 598th edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 599th msbranicky 550 185 4ms 20 Jan 2025 600th ethanlally 549 170 402ms 22 days ago First Prev 526–600 of 842 Next Last