Card Number Validation in all languages in bytes. 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 Bytes Time 526th lelbal 622 128 2 Oct 2024 526th Lv0Sys 🇵🇱 622 128 15 Jun 2025 528th not-a-pokemon 620 113 23 Jul 2025 529th DialFrost 🇸🇬 619 304 13 Aug 2025 530th BalaM314 618 104 4 Feb 2025 530th acollett89 618 104 15 Jul 2025 532nd codereport 🇨🇦 617 63 2 Oct 2024 533rd HumanoidCPU 617 107 17 Feb 2025 534th madex 🇩🇪 617 129 2 Oct 2024 534th RedzGoose 🇦🇺 617 129 15 Oct 2024 534th calebaitken 617 129 11 Apr 2025 537th MarcMush 🇫🇷 615 91 8 Oct 2024 538th jupj 🇫🇮 615 114 20 Jul 2025 539th Ripick 615 135 23 Mar 2025 540th Europe2048 612 130 2 Oct 2024 540th nstearns96 🇬🇧 612 130 2 Oct 2024 540th rollershutter 612 130 10 Jan 2025 540th Stockoh 🇫🇷 612 130 4 Jul 2025 544th bac0id 609 141 10 Jan 2025 545th HumanoidCPU 607 106 7 Mar 2025 545th daveberlin 607 106 27 Jun 2025 547th MeWhenI 🇻🇦 607 111 2 Oct 2024 548th inverseLorentz 🇦🇺 607 131 7 Oct 2024 548th dokutan 607 131 19 Oct 2024 548th sciencejiho 607 131 11 Feb 2025 548th Jaydosu 607 131 11 Apr 2025 552nd Seanharrs 606 117 15 Nov 2024 553rd emgordon154 606 156 13 Dec 2024 554th kaascevich 604 134 9 Jul 2025 555th MeWhenI 🇻🇦 603 73 2 Oct 2024 556th Shanethegamer 🇺🇸 603 154 3 Oct 2024 557th alemelis 602 93 1 Oct 2024 558th roguh 🇬🇹 599 117 13 Oct 2024 558th iczelia 🇩🇪 599 117 10 days ago 560th dokutan 598 117 3 Oct 2024 561st Mabeloid 🇳🇴 598 133 2 Oct 2024 561st Emutis 🇱🇹 598 133 4 Feb 2025 563rd MeWhenI 🇻🇦 597 98 1 Oct 2024 564th dokutan 595 159 19 Oct 2024 565th SirBogman 🇺🇸 591 64 11 Jul 2025 566th arcpolaris 591 120 28 Jan 2025 567th tatzyr 🇯🇵 589 81 23 Dec 2024 568th bac0id 589 119 10 Jan 2025 569th RaBa21 🇭🇺 589 135 19 Jul 2025 570th DialFrost 🇸🇬 586 67 25 Jan 2025 571st sciencedjinn 585 136 8 Nov 2024 571st ihatethefrench 585 136 4 Jan 2025 573rd gigaprofisi 🇺🇸 584 110 11 Aug 2025 574th dokutan 584 174 21 Feb 2025 575th olleicua 🇺🇸 582 82 18 Oct 2024 576th h3ra993huskp 🇯🇵 582 159 25 Nov 2024 576th Schmitt-Very-Cool 582 159 8 days ago 578th Trip-kun 581 136 5 Oct 2024 579th kurkale6ka 581 137 16 Oct 2024 579th 4ndyJ 🇬🇧 581 137 14 Nov 2024 579th Mikey-Beep 🇬🇧 581 137 6 Aug 2025 579th wobblybits 581 137 17 Aug 2025 579th snoozingnewt 🇺🇸 581 137 14 days ago 584th michelebastione 🇮🇹 576 123 26 Aug 2025 585th 823126 574 112 13 Nov 2024 585th dokutan 574 112 22 Jun 2025 587th scpchicken 🇵🇼 573 139 6 Oct 2024 588th KatieLG 🇬🇧 572 99 1 Oct 2024 589th MeWhenI 🇻🇦 569 331 2 Oct 2024 590th NanduBC 568 140 1 Oct 2024 590th jmerle 🇳🇱 568 140 10 Jan 2025 590th RobertHoeh 568 140 3 Mar 2025 590th smilesformiles3 568 140 12 Jun 2025 590th artem-aramma 568 140 18 Jun 2025 595th MeWhenI 🇻🇦 567 164 6 Oct 2024 596th FranklinJiaChen 564 141 2 Oct 2024 597th KatieLG 🇬🇧 561 85 12 Jan 2025 598th brimstonetrader 560 142 17 Oct 2024 598th codewrite 🇬🇧 560 142 5 May 2025 598th RobGLambert 560 142 8 Jun 2025 First Prev 526–600 of 768 Next Last