Card Number Validation in all languages in chars. Cheevos Holes Recent Holes Langs Medals Misc 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 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 CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 Erlang 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 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 Erlang 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 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 CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Chars Time Submitted 375th ovs-code 🇩🇪 717 90 22ms 3 Oct 2024 375th ryyyn 🇺🇸 717 90 20ms 26 Jul 2025 375th luuumine 🇫🇷 717 90 17ms 8 Oct 2025 379th ovs-code 🇩🇪 716 81 137ms 17 Apr 2025 380th alexsave 715 90 9ms 28 Oct 2024 381st rzv-me 711 95 4ms 5 Oct 2024 382nd snyderek 🇺🇸 710 121 53ms 1 Oct 2024 383rd Natanaelel 🇸🇪 709 55 42ms 1 Mar 2025 384th 5cw 🇺🇸 709 91 15ms 1 Oct 2024 384th stefangimmillaro 709 91 22ms 13 Oct 2024 384th dokutan 709 91 11ms 19 Oct 2024 384th GrayJoKing 🇦🇺 709 91 20ms 2 Jul 2025 388th GrayJoKing 🇦🇺 707 82 121ms 1 Oct 2024 389th Shanethegamer 🇺🇸 706 118 332ms 2 Oct 2024 390th DialFrost 🇸🇬 705 132 205ms 8 Apr 2025 391st MeWhenI 🇻🇦 704 115 435ms 5 Oct 2024 392nd cbrt-x 703 157 197ms 1 Oct 2024 393rd janlelis 702 68 37ms 1 Oct 2024 393rd tatzyr 🇯🇵 702 68 39ms 23 Dec 2024 395th emgordon154 702 76 6ms 7 Jun 2025 396th Shanethegamer 🇺🇸 702 92 18ms 3 Oct 2024 396th error256 702 92 26ms 7 Oct 2024 396th thatbirdguythatuknownot 702 92 17ms 14 Oct 2024 399th Alex-x90 🇺🇸 702 100 2ms 1 Oct 2024 400th sean-niemann 🇺🇸 700 82 450ms 23 Dec 2024 401st mousetail 🇳🇱 700 133 147ms 3 Oct 2024 402nd LukeBridges 🇬🇧 699 92 9ms 3 Oct 2024 403rd BlankSpruce 698 123 385ms 1 Oct 2024 404th emgordon154 695 101 2ms 25 Nov 2024 405th emgordon154 695 134 203ms 25 Feb 2025 406th tobeannouncd 695 159 162ms 13 Dec 2024 407th Bulmenisaurus 694 93 19ms 6 Oct 2024 407th lynn 694 93 17ms 8 Jan 2025 407th RaBa21 🇭🇺 694 93 17ms 19 Jul 2025 410th Shanethegamer 🇺🇸 693 41 3ms 4 Oct 2024 411th xyangst 692 93 13ms 1 Oct 2024 411th Salutations45 692 93 10ms 17 Nov 2024 411th strattonwhisler 692 93 9ms 26 Mar 2025 414th Alex-x90 🇺🇸 692 124 381ms 1 Oct 2024 414th Herbert00709 🇵🇱 692 124 56ms 14 Jun 2025 416th Shanethegamer 🇺🇸 691 83 508ms 5 Oct 2024 417th pardouin 🇫🇷 688 57 5ms 3 Oct 2024 418th NickTheEASDude 🇺🇸 688 115 3ms 17 Dec 2024 419th DialFrost 🇸🇬 687 94 21ms 1 Oct 2024 420th dokutan 687 116 8ms 19 Oct 2024 421st MeWhenI 🇻🇦 686 68 254ms 2 Oct 2024 422nd error256 685 104 386ms 14 Oct 2024 423rd Lv0Sys 🇵🇱 684 94 9ms 15 Jun 2025 423rd XenThe 🇬🇧 684 94 8ms 7 Jul 2025 425th ovs-code 🇩🇪 683 84 415ms 3 Oct 2024 425th snoozingnewt 🇺🇸 683 84 346ms 8 days ago 427th KatieLG 🇬🇧 682 70 41ms 2 Oct 2025 428th aDwarfNamedUrist 682 162 183ms 1 Sep 2025 429th madex 🇩🇪 681 103 2ms 2 Oct 2024 430th Shanethegamer 🇺🇸 679 65 2ms 1 Oct 2024 431st MeWhenI 🇻🇦 678 108 179ms 2 Oct 2024 432nd the-zammers 678 163 140ms 1 Dec 2024 433rd Shanethegamer 🇺🇸 677 172 42ms 2 Oct 2024 434th plcc0 676 37 70ms 6 Apr 2025 435th snoozingnewt 🇺🇸 676 95 75ms 19 days ago 436th BlankSpruce 675 104 2ms 1 Oct 2024 437th KasperKivimaeki 🇫🇮 672 96 43ms 1 Jul 2025 437th MeWhenI 🇻🇦 672 96 18ms 30 Jul 2025 439th jerrandolph 672 177 252ms 25 Sep 2025 440th edsrzf 🇳🇿 671 99 2,289ms 5 Jul 2025 441st tailorspy 671 128 362ms 4 Oct 2024 442nd HumanoidCPU 670 96 9ms 7 Mar 2025 443rd error256 669 101 4ms 24 Oct 2024 444th MeWhenI 🇻🇦 669 174 39ms 13 Feb 2025 445th Herbert00709 🇵🇱 668 105 2ms 14 Jun 2025 446th dbut2 🇦🇺 665 179 265ms 31 Oct 2024 447th AlephSquirrel 664 146 4ms 14 May 2025 448th two-bad 🇬🇧 663 97 10ms 2 Oct 2024 448th LordSir101 663 97 9ms 10 Aug 2025 450th CaedenHarper 🇨🇦 663 140 336ms 3 Oct 2025 First Prev 376–450 of 810 Next Last