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 373rd GrayJoKing 🇦🇺 709 91 2 Jul 2025 373rd snoozingnewt 🇺🇸 709 91 2 days ago 378th Natanaelel 🇸🇪 707 55 1 Mar 2025 379th GrayJoKing 🇦🇺 707 82 1 Oct 2024 380th MeWhenI 🇻🇦 704 115 5 Oct 2024 381st DialFrost 🇸🇬 704 132 8 Apr 2025 382nd Shanethegamer 🇺🇸 703 118 2 Oct 2024 383rd janlelis 702 68 1 Oct 2024 383rd tatzyr 🇯🇵 702 68 23 Dec 2024 385th emgordon154 702 76 7 Jun 2025 386th Shanethegamer 🇺🇸 701 92 3 Oct 2024 386th error256 701 92 7 Oct 2024 386th thatbirdguythatuknownot 701 92 14 Oct 2024 389th Alex-x90 🇺🇸 701 100 1 Oct 2024 390th cbrt-x 701 157 1 Oct 2024 391st sean-niemann 🇺🇸 699 82 23 Dec 2024 392nd LukeBridges 🇬🇧 699 92 3 Oct 2024 393rd mousetail 🇳🇱 699 133 3 Oct 2024 394th BlankSpruce 698 123 1 Oct 2024 395th Bulmenisaurus 694 93 6 Oct 2024 395th lynn 694 93 8 Jan 2025 395th RaBa21 🇭🇺 694 93 19 Jul 2025 398th emgordon154 694 101 25 Nov 2024 399th Shanethegamer 🇺🇸 693 41 4 Oct 2024 400th emgordon154 693 134 25 Feb 2025 401st xyangst 692 93 1 Oct 2024 401st Salutations45 692 93 17 Nov 2024 401st strattonwhisler 692 93 26 Mar 2025 404th Alex-x90 🇺🇸 692 124 1 Oct 2024 404th Herbert00709 🇵🇱 692 124 14 Jun 2025 406th albanian-laundromat 692 147 30 Jun 2025 407th tobeannouncd 692 159 13 Dec 2024 408th Shanethegamer 🇺🇸 691 83 5 Oct 2024 409th pardouin 🇫🇷 688 57 3 Oct 2024 410th DialFrost 🇸🇬 687 94 1 Oct 2024 411th NickTheEASDude 🇺🇸 687 115 17 Dec 2024 412th dokutan 687 116 19 Oct 2024 413th MeWhenI 🇻🇦 686 68 2 Oct 2024 414th Lv0Sys 🇵🇱 684 94 15 Jun 2025 414th XenThe 🇬🇧 684 94 7 Jul 2025 416th albanian-laundromat 683 86 11 days ago 417th KatieLG 🇬🇧 682 70 7 days ago 418th ovs-code 🇩🇪 682 84 3 Oct 2024 419th error256 682 104 14 Oct 2024 420th madex 🇩🇪 681 103 2 Oct 2024 421st aDwarfNamedUrist 679 162 1 Sep 2025 422nd Shanethegamer 🇺🇸 678 65 1 Oct 2024 423rd plcc0 676 37 6 Apr 2025 424th the-zammers 675 163 1 Dec 2024 425th BlankSpruce 674 104 1 Oct 2024 426th MeWhenI 🇻🇦 673 108 2 Oct 2024 427th KasperKivimaeki 🇫🇮 672 96 1 Jul 2025 427th MeWhenI 🇻🇦 672 96 30 Jul 2025 429th Shanethegamer 🇺🇸 672 172 2 Oct 2024 430th edsrzf 🇳🇿 671 99 5 Jul 2025 431st tailorspy 671 128 4 Oct 2024 432nd jerrandolph 671 177 14 days ago 433rd HumanoidCPU 670 96 7 Mar 2025 434th error256 668 101 24 Oct 2024 435th Herbert00709 🇵🇱 668 105 14 Jun 2025 436th AlephSquirrel 664 146 14 May 2025 437th MeWhenI 🇻🇦 664 174 13 Feb 2025 438th two-bad 🇬🇧 663 97 2 Oct 2024 438th LordSir101 663 97 10 Aug 2025 440th dbut2 🇦🇺 663 179 31 Oct 2024 441st CaedenHarper 🇨🇦 662 140 6 days ago 442nd rniii 661 106 2 Oct 2024 442nd gastropner 661 106 11 Feb 2025 444th 4hg 🇺🇸 659 59 5 Oct 2024 445th snoozingnewt 🇺🇸 659 87 2 days ago 446th MeWhenI 🇻🇦 659 88 2 Oct 2024 446th Shanethegamer 🇺🇸 659 88 5 Oct 2024 448th GolfingSuccess 🇬🇷 659 98 5 Oct 2024 448th firegene 🇮🇪 659 98 21 Oct 2024 448th JunkIce 659 98 3 Dec 2024 First Prev 376–450 of 770 Next Last