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 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 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 ArkScript 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 ArkScript 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 Calendar 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 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 639th wuzekai518 525 123 10ms 8 Oct 2024 642nd Macweese 524 178 382ms 3 Aug 2025 643rd galloj 🇨🇿 522 112 19ms 4 Oct 2024 644th NotEvenIndian 521 124 10ms 22 Oct 2024 644th ridingqwerty 🇺🇸 521 124 16ms 16 Jan 2025 644th CommandLeo 🇮🇹 521 124 9ms 5 Oct 2025 647th snoozingnewt 🇨🇦 520 213 138ms 2 Nov 2025 648th bac0id 518 180 370ms 9 Jan 2025 649th bnic24 517 125 16ms 3 Oct 2024 649th adoxography 517 125 11ms 22 Oct 2024 649th lelbal 517 125 9ms 14 Oct 2025 652nd sidok 515 109 239ms 13 Nov 2024 653rd dokutan 514 143 155ms 19 Oct 2024 654th nephila-nacrea 🇬🇧 511 77 3ms 2 Oct 2024 655th emgordon154 511 156 8ms 13 Dec 2024 656th KatieLG 🇬🇧 510 140 440ms 1 Oct 2024 657th yoshykai 510 183 364ms 12 Apr 2025 658th CatsAreFluffy 509 127 15ms 30 Oct 2024 658th WillowWispy 509 127 10ms 25 May 2025 660th KatieLG 🇬🇧 509 146 11ms 2 Oct 2024 661st Chinay-Domitrix 🇺🇸 508 131 4,591ms 30 Mar 2025 662nd snoozingnewt 🇨🇦 503 142 463ms 2 Nov 2025 663rd madex 🇩🇪 501 129 16ms 2 Oct 2024 663rd RedzGoose 🇦🇺 501 129 13ms 15 Oct 2024 663rd calebaitken 501 129 9ms 11 Apr 2025 663rd rollershutter 501 129 17ms 20 Nov 2025 667th msbranicky 501 138 3ms 3 Oct 2024 668th blaztoma 🇱🇹 500 154 109ms 28 Nov 2025 669th MeWhenI 🇻🇦 499 149 69ms 4 Oct 2024 670th janAkali 🇷🇺 499 167 357ms 8 Oct 2024 671st Europe2048 497 130 9ms 2 Oct 2024 671st nstearns96 🇬🇧 497 130 16ms 2 Oct 2024 671st Stockoh 🇫🇷 497 130 16ms 4 Jul 2025 674th inverseLorentz 🇦🇺 493 131 9ms 7 Oct 2024 674th sciencejiho 493 131 16ms 11 Feb 2025 674th Jaydosu 493 131 9ms 11 Apr 2025 674th Emutis 🇱🇹 493 131 9ms 11 Nov 2025 678th HumanoidCPU 492 145 479ms 5 Oct 2024 679th CarterStroik 492 161 2ms 19 Nov 2025 680th TheRealOhead 🇺🇸 491 131 14ms 1 Oct 2024 681st snoozingnewt 🇨🇦 490 150 154ms 2 Nov 2025 682nd h-hh-hhh 🇺🇦 488 177 65ms 2 Nov 2024 683rd jlangvand 487 141 2ms 15 Oct 2024 683rd HumanoidCPU 487 141 1ms 7 Mar 2025 685th snoozingnewt 🇨🇦 487 249 26ms 2 Nov 2025 686th snoozingnewt 🇨🇦 486 117 904ms 2 Nov 2025 687th Mabeloid 🇳🇴 486 133 9ms 2 Oct 2024 688th snoozingnewt 🇨🇦 482 173 332ms 2 Nov 2025 689th alphafalfa 480 92 2ms 8 Nov 2024 690th mitzal 480 180 66ms 9 Feb 2025 691st KatieLG 🇬🇧 479 120 413ms 1 Oct 2024 692nd MiffOttah 476 150 457ms 6 Oct 2024 692nd mwarvik 🇳🇴 476 150 450ms 13 days ago 694th sciencedjinn 475 136 9ms 8 Nov 2024 694th ihatethefrench 475 136 16ms 4 Jan 2025 694th Florian-Mt 475 136 19ms 5 Dec 2025 697th kurkale6ka 472 137 21ms 16 Oct 2024 697th 4ndyJ 🇬🇧 472 137 10ms 14 Nov 2024 697th Mikey-Beep 🇬🇧 472 137 16ms 6 Aug 2025 697th wobblybits 472 137 15ms 17 Aug 2025 701st luca1339 471 198 371ms 4 Nov 2024 702nd iczelia 🇩🇪 470 94 2ms 23 Sep 2025 703rd ejini6969 469 102 37ms 14 Jun 2025 704th h-hh-hhh 🇺🇦 467 147 2ms 2 Nov 2024 705th snoozingnewt 🇨🇦 466 200 228ms 2 Nov 2025 706th scpchicken 🇵🇼 465 139 16ms 6 Oct 2024 707th snoozingnewt 🇨🇦 464 121 222ms 27 Nov 2025 708th Jacob385 462 202 358ms 2 Oct 2024 709th NanduBC 461 140 10ms 1 Oct 2024 709th jmerle 🇳🇱 461 140 10ms 10 Jan 2025 709th RobertHoeh 461 140 9ms 3 Mar 2025 709th smilesformiles3 461 140 15ms 12 Jun 2025 709th artem-aramma 461 140 18ms 18 Jun 2025 709th Andrey2001 461 140 10ms 27 Nov 2025 715th snoozingnewt 🇨🇦 460 96 2ms 2 Nov 2025 716th madex 🇩🇪 460 104 38ms 2 Oct 2024 717th FranklinJiaChen 458 141 13ms 2 Oct 2024 718th TheZwierzLF 🇵🇱 455 105 37ms 6 days ago 719th brimstonetrader 455 142 10ms 17 Oct 2024 719th codewrite 🇬🇧 455 142 11ms 5 May 2025 First Prev 641–720 of 859 Next Last