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 450th firegene 🇮🇪 659 98 21 Oct 2024 450th JunkIce 659 98 3 Dec 2024 453rd emgordon154 659 111 12 Jan 2025 454th DialFrost 🇸🇬 658 67 22 Dec 2024 455th BambooleanLogic 🇸🇪 656 98 21 Oct 2024 456th error256 654 142 31 May 2025 457th MeWhenI 🇻🇦 653 142 2 Oct 2024 458th MeWhenI 🇻🇦 652 88 2 Oct 2024 459th SirBogman 🇺🇸 652 99 8 Oct 2024 460th voytxt 🇨🇿 651 89 17 Apr 2025 460th dokutan 651 89 28 Jun 2025 462nd dokutan 650 99 28 Jun 2025 463rd w911 649 183 7 Oct 2024 464th jwhear 🇺🇸 647 197 1 Oct 2024 465th MeWhenI 🇻🇦 645 91 29 Aug 2025 466th FlorianCassayre 🇫🇷 645 100 1 Oct 2024 466th bzijlema 🇳🇱 645 100 10 Oct 2024 466th bricknellj 645 100 4 Mar 2025 469th rucin93 🇵🇱 645 144 28 Oct 2024 470th CaedenHarper 🇨🇦 643 100 22 Aug 2025 470th iczelia 🇩🇪 643 100 4 days ago 472nd Shanethegamer 🇺🇸 643 124 4 Oct 2024 473rd koipondx86 642 123 8 Nov 2024 474th CaedenHarper 🇨🇦 642 185 3 Jan 2025 475th stefangimmillaro 639 73 1 Oct 2024 476th btjones0 639 101 2 Dec 2024 477th tomh1012 639 111 8 Sep 2025 478th Apataras 639 145 25 Jun 2025 479th MeWhenI 🇻🇦 638 73 3 Oct 2024 480th Yax42 🇫🇷 637 101 5 Sep 2025 481st Jonatan6 🇩🇰 637 110 24 Oct 2024 482nd elgan65536 636 146 2 Oct 2024 483rd annaproxy 633 102 1 Oct 2024 483rd xyangst 633 102 1 Oct 2024 485th Shanethegamer 🇺🇸 631 74 16 Oct 2024 486th msbranicky 631 188 7 Jan 2025 487th dokutan 630 91 19 Oct 2024 488th mossiegoat 627 103 21 Aug 2025 489th AlephSquirrel 625 40 1 Oct 2024 490th dokutan 622 127 10 Dec 2024 491st not-a-pokemon 620 113 23 Jul 2025 492nd DialFrost 🇸🇬 619 304 13 Aug 2025 493rd BalaM314 618 104 4 Feb 2025 493rd acollett89 618 104 15 Jul 2025 495th codereport 🇨🇦 617 63 2 Oct 2024 496th SirBogman 🇺🇸 617 93 23 Jul 2025 497th MarcMush 🇫🇷 615 91 8 Oct 2024 498th fourth-bit 615 105 1 Oct 2024 498th jared-hughes 615 105 3 Oct 2024 498th mattyhempstead 615 105 7 Oct 2024 501st jupj 🇫🇮 615 114 20 Jul 2025 502nd Ripick 615 135 23 Mar 2025 503rd olleicua 🇺🇸 612 78 18 Oct 2024 504th davecame 609 106 1 Oct 2024 504th starfihs 609 106 2 Oct 2024 504th rschwa6308 🇺🇸 609 106 28 Oct 2024 504th snydej 609 106 21 Nov 2024 504th andrewjc2000 609 106 17 Jul 2025 504th travisdoesmath 609 106 7 Sep 2025 510th bac0id 609 141 10 Jan 2025 511th daveberlin 607 106 27 Jun 2025 512th Seanharrs 606 117 15 Nov 2024 513th evnu 605 147 3 days ago 514th kaascevich 604 134 9 Jul 2025 515th MeWhenI 🇻🇦 603 73 2 Oct 2024 516th commandblockguy 🇺🇸 603 107 7 Oct 2024 516th zbreit 🇺🇸 603 107 29 Oct 2024 516th StardustGogeta 603 107 30 Oct 2024 516th ZakkkkAttackkkk 🇵🇭 603 107 8 Feb 2025 516th InigoK 🇺🇸 603 107 24 days ago 521st Shanethegamer 🇺🇸 603 154 3 Oct 2024 522nd alemelis 602 93 1 Oct 2024 523rd roguh 🇬🇹 599 117 13 Oct 2024 523rd iczelia 🇩🇪 599 117 21 days ago 525th neihousaigaai 598 108 4 Oct 2024 First Prev 451–525 of 777 Next Last