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 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 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 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 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 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 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 Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Bytes Time 598th RobGLambert 560 142 8 Jun 2025 598th blaztoma 🇱🇹 560 142 16 days ago 603rd aliakseikalosha 558 127 10 Oct 2024 604th GeneralFabian 556 143 9 Dec 2024 604th CutSandstone 556 143 30 Jan 2025 604th kistlerf 🇨🇭 556 143 19 May 2025 607th madex 🇩🇪 554 116 1 Oct 2024 608th MeWhenI 🇻🇦 554 290 2 Oct 2024 609th JDiLenarda 🇫🇷 553 165 1 Oct 2024 610th hiichbindermax 552 144 2 Oct 2024 610th mathisfun271 552 144 14 Oct 2024 610th bob-th 552 144 22 Oct 2024 613th edsrzf 🇳🇿 551 135 27 Feb 2025 614th KatieLG 🇬🇧 550 120 1 Oct 2024 615th msbranicky 550 185 20 Jan 2025 616th JunkIce 548 145 3 Dec 2024 616th Flekay 🇩🇪 548 145 10 Jul 2025 618th mousetail 🇳🇱 547 94 3 Oct 2024 619th mousetail 🇳🇱 547 128 3 Oct 2024 620th emgordon154 546 52 3 Nov 2024 621st zakariamouhid 545 118 1 Oct 2024 622nd croc54 545 146 15 Dec 2024 623rd xyangst 543 171 1 Oct 2024 624th dokutan 541 122 19 Oct 2024 625th najs91 541 131 15 Oct 2024 625th bac0id 541 131 9 Jan 2025 627th PyryL 🇫🇮 541 147 1 Mar 2025 628th eranws 540 119 23 Dec 2024 629th mbittner20 537 148 13 Oct 2024 630th Sciman101 536 147 26 Mar 2025 631st psaban 534 149 31 Jul 2025 632nd deancureton 531 121 30 Dec 2024 633rd msbranicky 531 175 13 Dec 2024 634th FlorianCassayre 🇫🇷 530 150 1 Oct 2024 634th jameswmccarty 530 150 5 Oct 2024 634th yousefalizadeh 530 150 23 Oct 2024 634th feherd 530 150 31 Oct 2024 634th TheZwierzLF 🇵🇱 530 150 17 May 2025 639th msbranicky 527 126 9 Jan 2025 640th CaedenHarper 🇨🇦 524 112 23 hours ago 641st adamnielson42 🇺🇸 523 152 6 Oct 2024 641st voidgloom 523 152 22 Oct 2024 643rd galloj 🇨🇿 522 112 4 Oct 2024 644th xyangst 520 153 1 Oct 2024 644th denisfouchard 520 153 14 days ago 646th osNiko 🇧🇷 516 154 15 days ago 647th sidok 514 109 13 Nov 2024 648th FortuiteMan 🇫🇷 513 155 16 Oct 2024 648th mossiegoat 513 155 15 days ago 650th nephila-nacrea 🇬🇧 510 77 2 Oct 2024 651st dokutan 509 143 19 Oct 2024 652nd KatieLG 🇬🇧 509 146 2 Oct 2024 653rd dokutan 507 126 22 Jun 2025 654th Chinay-Domitrix 🇺🇸 507 131 30 Mar 2025 655th msbranicky 507 138 3 Oct 2024 656th lhulinsky 507 157 21 Oct 2024 657th dokutan 506 116 6 days ago 658th KatieLG 🇬🇧 506 140 1 Oct 2024 659th ThatAlo 503 158 9 Dec 2024 660th albanian-laundromat 499 88 2 Jul 2025 661st MeWhenI 🇻🇦 499 149 4 Oct 2024 662nd Mabeloid 🇳🇴 497 133 2 Oct 2024 663rd CheeseCake628 🇳🇴 497 160 5 Nov 2024 664th janAkali 🇷🇺 497 167 8 Oct 2024 665th jlangvand 496 141 15 Oct 2024 665th HumanoidCPU 496 141 7 Mar 2025 667th pres-abhisheksinha 494 161 8 Oct 2024 668th TheRealOhead 🇺🇸 491 131 1 Oct 2024 669th ibixina 491 162 13 Oct 2024 669th TheAtrossian 491 162 5 Jan 2025 671st HumanoidCPU 489 145 5 Oct 2024 672nd JunkIce 486 136 3 Dec 2024 673rd h-hh-hhh 🇺🇦 484 177 2 Nov 2024 674th Mabeloid 🇳🇴 483 145 2 Oct 2024 675th snoozingnewt 🇺🇸 482 137 27 Jan 2025 Prev 601–675 of 754 Next