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 599th bob-th 552 144 22 Oct 2024 602nd edsrzf 🇳🇿 551 135 27 Feb 2025 603rd KatieLG 🇬🇧 550 120 1 Oct 2024 604th msbranicky 550 185 20 Jan 2025 605th JunkIce 548 145 3 Dec 2024 605th Flekay 🇩🇪 548 145 10 Jul 2025 607th mousetail 🇳🇱 547 94 3 Oct 2024 608th mousetail 🇳🇱 547 128 3 Oct 2024 609th emgordon154 546 52 3 Nov 2024 610th zakariamouhid 544 118 1 Oct 2024 611th croc54 544 146 15 Dec 2024 612th xyangst 543 171 1 Oct 2024 613th dokutan 541 122 19 Oct 2024 614th PyryL 🇫🇮 541 147 1 Mar 2025 615th eranws 540 119 23 Dec 2024 616th najs91 540 131 15 Oct 2024 616th bac0id 540 131 9 Jan 2025 618th mbittner20 537 148 13 Oct 2024 619th Sciman101 536 147 26 Mar 2025 620th psaban 533 149 17 days ago 621st deancureton 531 121 30 Dec 2024 622nd msbranicky 531 175 13 Dec 2024 623rd FlorianCassayre 🇫🇷 530 150 1 Oct 2024 623rd jameswmccarty 530 150 5 Oct 2024 623rd yousefalizadeh 530 150 23 Oct 2024 623rd feherd 530 150 31 Oct 2024 623rd TheZwierzLF 🇵🇱 530 150 17 May 2025 628th msbranicky 527 126 9 Jan 2025 629th adamnielson42 🇺🇸 523 152 6 Oct 2024 629th voidgloom 523 152 22 Oct 2024 631st galloj 🇨🇿 522 112 4 Oct 2024 632nd xyangst 520 153 1 Oct 2024 633rd sidok 514 109 13 Nov 2024 634th FortuiteMan 513 155 16 Oct 2024 635th nephila-nacrea 🇬🇧 510 77 2 Oct 2024 636th dokutan 509 143 19 Oct 2024 637th KatieLG 🇬🇧 509 146 2 Oct 2024 638th dokutan 507 126 22 Jun 2025 639th Chinay-Domitrix 🇺🇸 507 131 30 Mar 2025 640th msbranicky 507 138 3 Oct 2024 641st KatieLG 🇬🇧 506 140 1 Oct 2024 642nd lhulinsky 506 157 21 Oct 2024 642nd osNiko 🇧🇷 506 157 2 days ago 644th ThatAlo 503 158 9 Dec 2024 645th albanian-laundromat 499 88 2 Jul 2025 646th MeWhenI 🇻🇦 499 149 4 Oct 2024 647th CheeseCake628 🇳🇴 497 160 5 Nov 2024 648th janAkali 🇷🇺 497 167 8 Oct 2024 649th Mabeloid 🇳🇴 496 133 2 Oct 2024 650th jlangvand 496 141 15 Oct 2024 650th HumanoidCPU 496 141 7 Mar 2025 652nd pres-abhisheksinha 494 161 8 Oct 2024 653rd ibixina 491 162 13 Oct 2024 653rd TheAtrossian 491 162 5 Jan 2025 655th TheRealOhead 🇺🇸 490 131 1 Oct 2024 656th HumanoidCPU 488 145 5 Oct 2024 657th JunkIce 485 136 3 Dec 2024 658th h-hh-hhh 🇺🇦 484 177 2 Nov 2024 659th Mabeloid 🇳🇴 483 145 2 Oct 2024 660th snoozingnewt 🇺🇸 482 137 27 Jan 2025 661st Vaekor 482 165 15 Dec 2024 661st mossiegoat 482 165 16 Jul 2025 663rd alphafalfa 477 92 8 Nov 2024 664th KatieLG 🇬🇧 476 108 13 Oct 2024 665th h-hh-hhh 🇺🇦 476 147 2 Nov 2024 666th mitzal 476 180 9 Feb 2025 667th MiffOttah 472 150 6 Oct 2024 668th Maximizer02 471 201 1 Oct 2024 669th JesseNoEyes 🇺🇸 470 169 1 Oct 2024 670th ejini6969 468 102 14 Jun 2025 671st zyc-2024 🇨🇳 468 170 5 Oct 2024 672nd ComputerKWasTaken 🇺🇸 465 171 14 Oct 2024 673rd Yewzir 🇧🇪 460 171 26 Dec 2024 674th madex 🇩🇪 459 104 2 Oct 2024 675th clayboll99 452 176 10 Jul 2025 Prev 601–675 of 737 Next