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 401st Shanethegamer 🇺🇸 729 112 106ms 3 Oct 2024 402nd error256 728 98 497ms 17 Jan 2026 403rd dtbao20 🇻🇳 724 89 10ms 1 Oct 2024 403rd madeforlosers 724 89 11ms 17 Oct 2024 403rd junkondo-jp 724 89 15ms 14 Dec 2024 403rd alexsave 724 89 12ms 20 Jan 2026 407th zacjl 724 110 6ms 10 Oct 2024 408th Shanethegamer 🇺🇸 724 126 1,450ms 2 Oct 2024 409th Shanethegamer 🇺🇸 723 96 2ms 3 Oct 2024 410th annaproxy 723 132 15ms 1 Oct 2024 411th MeWhenI 🇻🇦 721 78 316ms 2 Oct 2024 412th MeWhenI 🇻🇦 721 179 1,697ms 7 Nov 2025 413th weeble 720 74 6ms 1 Jul 2025 414th nwellnhof 🇩🇪 718 90 20ms 1 Oct 2024 414th ovs-code 🇩🇪 718 90 17ms 3 Oct 2024 414th luuumine 🇫🇷 718 90 17ms 8 Oct 2025 414th firegene 🇮🇪 718 90 16ms 23 days ago 414th lukegustafson 🇺🇸 718 90 17ms 17 days ago 419th snyderek 🇺🇸 718 121 61ms 1 Oct 2024 420th ovs-code 🇩🇪 717 81 203ms 17 Apr 2025 421st JOrE20 716 90 10ms 11 Feb 2026 422nd Shanethegamer 🇺🇸 715 101 5ms 2 Oct 2024 423rd ovs-code 🇩🇪 714 75 1,104ms 1 Oct 2024 424th rzv-me 713 95 6ms 5 Oct 2024 425th DialFrost 🇸🇬 713 106 12ms 13 Dec 2024 426th h3ra993huskp 🇯🇵 713 131 422ms 30 Nov 2025 427th CLOStrophobic 🇮🇹 712 160 40ms 27 Feb 2025 428th 5cw 🇺🇸 710 91 16ms 1 Oct 2024 428th stefangimmillaro 710 91 16ms 13 Oct 2024 428th GrayJoKing 🇦🇺 710 91 19ms 2 Jul 2025 431st Natanaelel 🇸🇪 709 55 34ms 1 Mar 2025 432nd GrayJoKing 🇦🇺 708 82 133ms 1 Oct 2024 433rd DialFrost 🇸🇬 708 132 238ms 8 Apr 2025 434th Shanethegamer 🇺🇸 706 118 376ms 2 Oct 2024 435th BlankSpruce 706 123 427ms 1 Oct 2024 436th cbrt-x 706 157 139ms 1 Oct 2024 437th edsrzf 🇳🇿 705 76 1,005ms 1 Oct 2024 438th janlelis 704 68 39ms 1 Oct 2024 438th tatzyr 🇯🇵 704 68 38ms 23 Dec 2024 440th MeWhenI 🇻🇦 704 115 453ms 5 Oct 2024 441st Shanethegamer 🇺🇸 704 156 30ms 2 Oct 2024 442nd Shanethegamer 🇺🇸 703 92 16ms 3 Oct 2024 442nd error256 703 92 21ms 7 Oct 2024 442nd thatbirdguythatuknownot 703 92 18ms 14 Oct 2024 445th emgordon154 702 76 5ms 7 Jun 2025 446th mousetail 🇳🇱 702 133 169ms 3 Oct 2024 447th LukeBridges 🇬🇧 701 92 10ms 3 Oct 2024 448th Alex-x90 🇺🇸 701 124 435ms 1 Oct 2024 448th Herbert00709 🇵🇱 701 124 61ms 14 Jun 2025 450th albanian-laundromat 700 108 68ms 8 days ago 451st emgordon154 697 134 241ms 25 Feb 2025 452nd tobeannouncd 697 159 146ms 13 Dec 2024 453rd Bulmenisaurus 695 93 17ms 6 Oct 2024 453rd lynn 695 93 16ms 8 Jan 2025 453rd RaBa21 🇭🇺 695 93 17ms 19 Jul 2025 453rd KasperKivimaeki 🇫🇮 695 93 17ms 30 Nov 2025 453rd blaztoma 🇱🇹 695 93 17ms 18 Dec 2025 458th Shanethegamer 🇺🇸 693 41 3ms 4 Oct 2024 459th Shanethegamer 🇺🇸 693 83 445ms 5 Oct 2024 460th xyangst 693 93 11ms 1 Oct 2024 460th Salutations45 693 93 12ms 17 Nov 2024 460th strattonwhisler 693 93 10ms 26 Mar 2025 463rd pardouin 🇫🇷 691 57 4ms 3 Oct 2024 464th NickTheEASDude 🇺🇸 690 115 3ms 17 Dec 2024 465th DialFrost 🇸🇬 688 94 18ms 1 Oct 2024 466th Alex-x90 🇺🇸 688 100 2ms 1 Oct 2024 467th dokutan 687 116 7ms 19 Oct 2024 468th MeWhenI 🇻🇦 686 68 307ms 2 Oct 2024 469th XenThe 🇬🇧 686 94 10ms 7 Jul 2025 470th ovs-code 🇩🇪 685 84 458ms 3 Oct 2024 471st KatieLG 🇬🇧 684 70 36ms 2 Oct 2025 472nd aDwarfNamedUrist 684 162 138ms 1 Sep 2025 473rd MeWhenI 🇻🇦 681 108 206ms 2 Oct 2024 474th the-zammers 680 163 149ms 1 Dec 2024 475th tailorspy 679 128 440ms 4 Oct 2024 476th GrayJoKing 🇦🇺 678 79 1,204ms 1 Oct 2024 477th snoozingnewt 🇨🇦 676 95 78ms 23 Oct 2025 478th edsrzf 🇳🇿 674 99 2,281ms 5 Jul 2025 478th jkelly467 674 99 2,384ms 22 Jan 2026 480th Yax42 🇫🇷 674 129 68ms 8 Jan 2026 First Prev 401–480 of 908 Next Last