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 Topological Sort 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 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 Knight 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 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 Knight 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 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 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 Trinomial Triangle Turtle Tutorial # Golfer Points Bytes Time 526th Ripick 615 135 23 Mar 2025 527th jupj 🇫🇮 614 114 20 days ago 528th Europe2048 611 130 2 Oct 2024 528th nstearns96 🇬🇧 611 130 2 Oct 2024 528th rollershutter 611 130 10 Jan 2025 528th Stockoh 🇫🇷 611 130 4 Jul 2025 532nd bac0id 608 141 10 Jan 2025 533rd MeWhenI 🇻🇦 607 111 2 Oct 2024 534th inverseLorentz 🇦🇺 607 131 7 Oct 2024 534th dokutan 607 131 19 Oct 2024 534th CornerMercury 🇬🇧 607 131 3 Dec 2024 534th sciencejiho 607 131 11 Feb 2025 534th Jaydosu 607 131 11 Apr 2025 539th HumanoidCPU 606 106 7 Mar 2025 539th daveberlin 606 106 27 Jun 2025 541st emgordon154 606 156 13 Dec 2024 542nd Seanharrs 605 117 15 Nov 2024 543rd Shanethegamer 🇺🇸 604 217 4 Oct 2024 544th Shanethegamer 🇺🇸 603 154 3 Oct 2024 545th MeWhenI 🇻🇦 602 73 2 Oct 2024 546th alemelis 602 93 1 Oct 2024 547th kaascevich 601 134 9 Jul 2025 548th albanian-laundromat 599 159 12 Jul 2025 549th dokutan 598 117 3 Oct 2024 549th roguh 🇬🇹 598 117 13 Oct 2024 551st Mabeloid 🇳🇴 598 133 2 Oct 2024 551st Emutis 🇱🇹 598 133 4 Feb 2025 553rd ravnskjaer 🇩🇰 598 195 20 Dec 2024 554th MeWhenI 🇻🇦 597 98 1 Oct 2024 555th dokutan 595 159 19 Oct 2024 556th SirBogman 🇺🇸 591 64 11 Jul 2025 557th arcpolaris 590 120 28 Jan 2025 558th tatzyr 🇯🇵 589 81 23 Dec 2024 559th RaBa21 🇭🇺 589 135 22 days ago 560th luca1339 589 198 4 Nov 2024 561st bac0id 588 119 10 Jan 2025 562nd DialFrost 🇸🇬 586 67 25 Jan 2025 563rd sciencedjinn 584 136 8 Nov 2024 563rd ihatethefrench 584 136 4 Jan 2025 565th dokutan 584 174 21 Feb 2025 566th olleicua 🇺🇸 582 82 18 Oct 2024 567th Trip-kun 580 136 5 Oct 2024 568th kurkale6ka 580 137 16 Oct 2024 568th 4ndyJ 🇬🇧 580 137 14 Nov 2024 568th Mikey-Beep 🇬🇧 580 137 3 days ago 571st Jacob385 577 202 2 Oct 2024 572nd MeWhenI 🇻🇦 576 331 2 Oct 2024 573rd 823126 573 112 13 Nov 2024 573rd dokutan 573 112 22 Jun 2025 575th KatieLG 🇬🇧 572 99 1 Oct 2024 576th scpchicken 🇵🇼 572 139 6 Oct 2024 577th emgordon154 568 44 1 Oct 2024 578th NanduBC 568 140 1 Oct 2024 578th jmerle 🇳🇱 568 140 10 Jan 2025 578th RobertHoeh 568 140 3 Mar 2025 578th smilesformiles3 568 140 12 Jun 2025 578th artem-aramma 568 140 18 Jun 2025 583rd MeWhenI 🇻🇦 567 164 6 Oct 2024 584th FranklinJiaChen 564 141 2 Oct 2024 585th KatieLG 🇬🇧 561 85 12 Jan 2025 586th brimstonetrader 560 142 17 Oct 2024 586th snoozingnewt 🇺🇸 560 142 31 Mar 2025 586th codewrite 🇬🇧 560 142 5 May 2025 586th RobGLambert 560 142 8 Jun 2025 590th aliakseikalosha 557 127 10 Oct 2024 591st GeneralFabian 556 143 9 Dec 2024 591st CutSandstone 556 143 30 Jan 2025 591st kistlerf 🇨🇭 556 143 19 May 2025 594th madex 🇩🇪 554 116 1 Oct 2024 595th MeWhenI 🇻🇦 554 290 2 Oct 2024 596th JDiLenarda 🇫🇷 553 165 1 Oct 2024 597th hiichbindermax 552 144 2 Oct 2024 597th mathisfun271 552 144 14 Oct 2024 597th bob-th 552 144 22 Oct 2024 600th edsrzf 🇳🇿 551 135 27 Feb 2025 Prev 526–600 of 734 Next