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 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 Transpose Sentence 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 Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Topological Sort Trinomial Triangle 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 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 Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 Transpose Sentence 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 Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Topological Sort Trinomial Triangle Turtle Tutorial # Golfer Points Bytes Time 525th daveberlin 606 106 27 Jun 2025 527th inverseLorentz 🇦🇺 606 131 7 Oct 2024 527th dokutan 606 131 19 Oct 2024 527th CornerMercury 🇬🇧 606 131 3 Dec 2024 527th sciencejiho 606 131 11 Feb 2025 527th Jaydosu 606 131 11 Apr 2025 532nd Seanharrs 605 117 15 Nov 2024 533rd Shanethegamer 🇺🇸 604 217 4 Oct 2024 534th Shanethegamer 🇺🇸 603 154 3 Oct 2024 535th emgordon154 603 156 13 Dec 2024 536th MeWhenI 🇻🇦 602 73 2 Oct 2024 537th alemelis 602 93 1 Oct 2024 538th kaascevich 601 134 16 days ago 539th albanian-laundromat 599 159 13 days ago 540th dokutan 598 117 3 Oct 2024 540th roguh 🇬🇹 598 117 13 Oct 2024 542nd MeWhenI 🇻🇦 597 98 1 Oct 2024 543rd Mabeloid 🇳🇴 597 133 2 Oct 2024 543rd Emutis 🇱🇹 597 133 4 Feb 2025 545th ravnskjaer 🇩🇰 597 195 20 Dec 2024 546th dokutan 592 159 19 Oct 2024 547th SirBogman 🇺🇸 591 64 14 days ago 548th arcpolaris 590 120 28 Jan 2025 549th tatzyr 🇯🇵 588 81 23 Dec 2024 550th bac0id 588 119 10 Jan 2025 551st RaBa21 🇭🇺 588 135 7 days ago 552nd luca1339 588 198 4 Nov 2024 553rd DialFrost 🇸🇬 585 67 25 Jan 2025 554th sciencedjinn 584 136 8 Nov 2024 554th ihatethefrench 584 136 4 Jan 2025 556th dokutan 584 174 21 Feb 2025 557th olleicua 🇺🇸 581 82 18 Oct 2024 558th Trip-kun 580 136 5 Oct 2024 559th kurkale6ka 580 137 16 Oct 2024 559th 4ndyJ 🇬🇧 580 137 14 Nov 2024 561st Jacob385 576 202 2 Oct 2024 562nd MeWhenI 🇻🇦 576 331 2 Oct 2024 563rd 823126 573 112 13 Nov 2024 563rd dokutan 573 112 22 Jun 2025 565th KatieLG 🇬🇧 572 99 1 Oct 2024 566th scpchicken 🇵🇼 572 139 6 Oct 2024 567th emgordon154 568 44 1 Oct 2024 568th NanduBC 567 140 1 Oct 2024 568th Mikey-Beep 🇬🇧 567 140 7 Oct 2024 568th jmerle 🇳🇱 567 140 10 Jan 2025 568th RobertHoeh 567 140 3 Mar 2025 568th smilesformiles3 567 140 12 Jun 2025 568th artem-aramma 567 140 18 Jun 2025 574th MeWhenI 🇻🇦 567 164 6 Oct 2024 575th FranklinJiaChen 563 141 2 Oct 2024 576th KatieLG 🇬🇧 561 85 12 Jan 2025 577th brimstonetrader 559 142 17 Oct 2024 577th snoozingnewt 🇺🇸 559 142 31 Mar 2025 577th codewrite 🇬🇧 559 142 5 May 2025 577th RobGLambert 559 142 8 Jun 2025 581st aliakseikalosha 557 127 10 Oct 2024 582nd GeneralFabian 556 143 9 Dec 2024 582nd CutSandstone 556 143 30 Jan 2025 582nd kistlerf 🇨🇭 556 143 19 May 2025 585th MeWhenI 🇻🇦 554 290 2 Oct 2024 586th madex 🇩🇪 553 116 1 Oct 2024 587th JDiLenarda 🇫🇷 553 165 1 Oct 2024 588th hiichbindermax 552 144 2 Oct 2024 588th mathisfun271 552 144 14 Oct 2024 588th bob-th 552 144 22 Oct 2024 591st edsrzf 🇳🇿 551 135 27 Feb 2025 592nd msbranicky 550 185 20 Jan 2025 593rd KatieLG 🇬🇧 549 120 1 Oct 2024 594th JunkIce 548 145 3 Dec 2024 594th Flekay 🇩🇪 548 145 15 days ago 596th mousetail 🇳🇱 547 94 3 Oct 2024 597th mousetail 🇳🇱 547 128 3 Oct 2024 598th emgordon154 546 52 3 Nov 2024 599th zakariamouhid 544 118 1 Oct 2024 600th croc54 544 146 15 Dec 2024 Prev 526–600 of 722 Next