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 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 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers 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 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 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Chars Time 376th MeWhenI 🇻🇦 704 115 5 Oct 2024 377th DialFrost 🇸🇬 704 132 8 Apr 2025 378th Shanethegamer 🇺🇸 703 118 2 Oct 2024 379th janlelis 702 68 1 Oct 2024 379th tatzyr 🇯🇵 702 68 23 Dec 2024 381st emgordon154 702 76 7 Jun 2025 382nd Shanethegamer 🇺🇸 701 92 3 Oct 2024 382nd error256 701 92 7 Oct 2024 382nd thatbirdguythatuknownot 701 92 14 Oct 2024 385th Alex-x90 🇺🇸 701 100 1 Oct 2024 386th cbrt-x 701 157 1 Oct 2024 387th sean-niemann 🇺🇸 699 82 23 Dec 2024 388th LukeBridges 🇬🇧 699 92 3 Oct 2024 389th mousetail 🇳🇱 699 133 3 Oct 2024 390th BlankSpruce 698 123 1 Oct 2024 391st Bulmenisaurus 694 93 6 Oct 2024 391st lynn 694 93 8 Jan 2025 391st RaBa21 🇭🇺 694 93 19 Jul 2025 394th emgordon154 694 101 25 Nov 2024 395th Shanethegamer 🇺🇸 693 41 4 Oct 2024 396th emgordon154 693 134 25 Feb 2025 397th xyangst 692 93 1 Oct 2024 397th Salutations45 692 93 17 Nov 2024 397th strattonwhisler 692 93 26 Mar 2025 400th Alex-x90 🇺🇸 692 124 1 Oct 2024 400th Herbert00709 🇵🇱 692 124 14 Jun 2025 402nd albanian-laundromat 692 147 30 Jun 2025 403rd tobeannouncd 692 159 13 Dec 2024 404th Shanethegamer 🇺🇸 691 83 5 Oct 2024 405th pardouin 🇫🇷 688 57 3 Oct 2024 406th NickTheEASDude 🇺🇸 687 115 17 Dec 2024 407th dokutan 687 116 19 Oct 2024 408th MeWhenI 🇻🇦 686 68 2 Oct 2024 409th DialFrost 🇸🇬 686 94 1 Oct 2024 409th snoozingnewt 🇺🇸 686 94 15 days ago 411th Lv0Sys 🇵🇱 684 94 15 Jun 2025 411th XenThe 🇬🇧 684 94 7 Jul 2025 413th albanian-laundromat 683 86 7 days ago 414th KatieLG 🇬🇧 682 70 3 days ago 415th ovs-code 🇩🇪 682 84 3 Oct 2024 416th error256 682 104 14 Oct 2024 417th madex 🇩🇪 681 103 2 Oct 2024 418th aDwarfNamedUrist 679 162 1 Sep 2025 419th Shanethegamer 🇺🇸 678 65 1 Oct 2024 420th plcc0 676 37 6 Apr 2025 421st the-zammers 675 163 1 Dec 2024 422nd BlankSpruce 674 104 1 Oct 2024 423rd MeWhenI 🇻🇦 673 108 2 Oct 2024 424th KasperKivimaeki 🇫🇮 672 96 1 Jul 2025 424th MeWhenI 🇻🇦 672 96 30 Jul 2025 426th Shanethegamer 🇺🇸 672 172 2 Oct 2024 427th edsrzf 🇳🇿 671 99 5 Jul 2025 428th tailorspy 671 128 4 Oct 2024 429th HumanoidCPU 670 96 7 Mar 2025 430th jerrandolph 669 177 11 days ago 431st error256 668 101 24 Oct 2024 432nd Herbert00709 🇵🇱 668 105 14 Jun 2025 433rd AlephSquirrel 664 146 14 May 2025 434th MeWhenI 🇻🇦 664 174 13 Feb 2025 435th two-bad 🇬🇧 663 97 2 Oct 2024 435th LordSir101 663 97 10 Aug 2025 437th dbut2 🇦🇺 662 179 31 Oct 2024 438th rniii 661 106 2 Oct 2024 438th gastropner 661 106 11 Feb 2025 440th CaedenHarper 🇨🇦 661 140 2 days ago 441st 4hg 🇺🇸 659 59 5 Oct 2024 442nd MeWhenI 🇻🇦 659 88 2 Oct 2024 442nd Shanethegamer 🇺🇸 659 88 5 Oct 2024 444th emgordon154 659 111 12 Jan 2025 445th DialFrost 🇸🇬 658 67 22 Dec 2024 446th GolfingSuccess 🇬🇷 658 98 5 Oct 2024 446th firegene 🇮🇪 658 98 21 Oct 2024 446th JunkIce 658 98 3 Dec 2024 449th BambooleanLogic 🇸🇪 656 98 21 Oct 2024 450th error256 654 142 31 May 2025 First Prev 376–450 of 767 Next Last