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 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 Mandelbrot 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 Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 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 Mandelbrot 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 luca1339 585 198 4 Nov 2024 527th BREMAUCY 🇫🇷 582 138 2 Oct 2024 528th dokutan 582 174 21 Feb 2025 529th olleicua 🇺🇸 581 82 18 Oct 2024 530th Trip-kun 580 136 5 Oct 2024 531st scpchicken 🇵🇼 577 139 6 Oct 2024 532nd MeWhenI 🇻🇦 576 331 2 Oct 2024 533rd Jacob385 574 202 2 Oct 2024 534th NanduBC 573 140 1 Oct 2024 534th Mikey-Beep 🇬🇧 573 140 7 Oct 2024 534th jmerle 🇳🇱 573 140 10 Jan 2025 534th RobertHoeh 573 140 3 Mar 2025 538th KatieLG 🇬🇧 572 99 1 Oct 2024 539th 823126 572 112 13 Nov 2024 540th FranklinJiaChen 569 141 2 Oct 2024 541st emgordon154 568 44 1 Oct 2024 542nd brimstonetrader 565 142 17 Oct 2024 542nd snoozingnewt 🇺🇸 565 142 31 Mar 2025 542nd codewrite 🇬🇧 565 142 5 May 2025 545th MeWhenI 🇻🇦 565 164 6 Oct 2024 546th GeneralFabian 561 143 9 Dec 2024 546th CutSandstone 561 143 30 Jan 2025 546th kistlerf 🇨🇭 561 143 18 days ago 549th KatieLG 🇬🇧 560 85 12 Jan 2025 550th aliakseikalosha 557 127 10 Oct 2024 551st hiichbindermax 557 144 2 Oct 2024 551st mathisfun271 557 144 14 Oct 2024 551st bob-th 557 144 22 Oct 2024 554th JunkIce 554 145 3 Dec 2024 555th MeWhenI 🇻🇦 554 290 2 Oct 2024 556th JDiLenarda 🇫🇷 553 165 1 Oct 2024 557th madex 🇩🇪 552 116 1 Oct 2024 558th edsrzf 🇳🇿 551 135 27 Feb 2025 559th croc54 550 146 15 Dec 2024 560th KatieLG 🇬🇧 548 120 1 Oct 2024 561st mousetail 🇳🇱 547 94 3 Oct 2024 562nd msbranicky 547 185 20 Jan 2025 563rd emgordon154 546 52 3 Nov 2024 564th mousetail 🇳🇱 546 128 3 Oct 2024 565th PyryL 🇫🇮 546 147 1 Mar 2025 566th zakariamouhid 543 118 1 Oct 2024 567th mbittner20 542 148 13 Oct 2024 568th xyangst 542 171 1 Oct 2024 569th najs91 540 131 15 Oct 2024 569th bac0id 540 131 9 Jan 2025 571st dokutan 539 122 19 Oct 2024 572nd eranws 538 119 23 Dec 2024 573rd Sciman101 536 147 26 Mar 2025 574th FlorianCassayre 🇫🇷 535 150 1 Oct 2024 574th jameswmccarty 535 150 5 Oct 2024 574th yousefalizadeh 535 150 23 Oct 2024 574th feherd 535 150 31 Oct 2024 574th RaBa21 535 150 4 May 2025 574th TheZwierzLF 🇵🇱 535 150 20 days ago 580th msbranicky 530 175 13 Dec 2024 581st deancureton 529 121 30 Dec 2024 582nd janAkali 🇷🇺 529 167 8 Oct 2024 583rd adamnielson42 🇺🇸 528 152 6 Oct 2024 583rd voidgloom 528 152 22 Oct 2024 585th msbranicky 527 126 9 Jan 2025 586th xyangst 525 153 1 Oct 2024 587th galloj 🇨🇿 522 112 4 Oct 2024 588th cdesodt 518 155 16 Oct 2024 589th sidok 514 109 13 Nov 2024 590th lhulinsky 511 157 21 Oct 2024 591st nephila-nacrea 🇬🇧 509 77 2 Oct 2024 592nd dokutan 509 143 19 Oct 2024 593rd KatieLG 🇬🇧 509 146 2 Oct 2024 594th ThatAlo 508 158 9 Dec 2024 595th Chinay-Domitrix 🇺🇸 507 131 30 Mar 2025 596th KatieLG 🇬🇧 506 140 1 Oct 2024 597th msbranicky 505 138 3 Oct 2024 598th CheeseCake628 🇳🇴 502 160 5 Nov 2024 599th MeWhenI 🇻🇦 499 149 4 Oct 2024 600th pres-abhisheksinha 498 161 8 Oct 2024 Prev 526–600 of 672 Next