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 Trinomial Triangle 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 Smooth Numbers Snake Sphenic Numbers 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 Luau 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 Luau 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 Trinomial Triangle 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 Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Bytes Time 601st aliakseikalosha 558 127 10 Oct 2024 602nd GeneralFabian 556 143 9 Dec 2024 602nd CutSandstone 556 143 30 Jan 2025 602nd kistlerf 🇨🇭 556 143 19 May 2025 605th madex 🇩🇪 554 116 1 Oct 2024 606th MeWhenI 🇻🇦 554 290 2 Oct 2024 607th hiichbindermax 553 144 2 Oct 2024 607th mathisfun271 553 144 14 Oct 2024 607th bob-th 553 144 22 Oct 2024 610th JDiLenarda 🇫🇷 553 165 1 Oct 2024 611th edsrzf 🇳🇿 551 135 27 Feb 2025 612th KatieLG 🇬🇧 550 120 1 Oct 2024 613th msbranicky 550 185 20 Jan 2025 614th JunkIce 549 145 3 Dec 2024 614th Flekay 🇩🇪 549 145 10 Jul 2025 616th mousetail 🇳🇱 548 128 3 Oct 2024 617th emgordon154 546 52 3 Nov 2024 618th zakariamouhid 545 118 1 Oct 2024 619th croc54 545 146 15 Dec 2024 620th xyangst 543 171 1 Oct 2024 621st dokutan 541 122 19 Oct 2024 622nd najs91 541 131 15 Oct 2024 622nd bac0id 541 131 9 Jan 2025 624th PyryL 🇫🇮 541 147 1 Mar 2025 625th eranws 540 119 23 Dec 2024 626th mbittner20 538 148 13 Oct 2024 627th Sciman101 537 147 26 Mar 2025 628th psaban 534 149 31 Jul 2025 629th deancureton 531 121 30 Dec 2024 630th msbranicky 531 175 13 Dec 2024 631st FlorianCassayre 🇫🇷 530 150 1 Oct 2024 631st jameswmccarty 530 150 5 Oct 2024 631st yousefalizadeh 530 150 23 Oct 2024 631st feherd 530 150 31 Oct 2024 631st TheZwierzLF 🇵🇱 530 150 17 May 2025 636th msbranicky 527 126 9 Jan 2025 637th adamnielson42 🇺🇸 524 152 6 Oct 2024 637th voidgloom 524 152 22 Oct 2024 637th omero-san 524 152 11 days ago 640th iczelia 🇩🇪 523 123 8 days ago 641st galloj 🇨🇿 522 112 4 Oct 2024 642nd xyangst 520 153 1 Oct 2024 642nd denisfouchard 520 153 21 Aug 2025 644th Macweese 520 178 3 Aug 2025 645th osNiko 🇧🇷 517 154 21 Aug 2025 646th sidok 514 109 13 Nov 2024 647th bac0id 514 180 9 Jan 2025 648th FortuiteMan 🇫🇷 513 155 16 Oct 2024 648th mossiegoat 513 155 21 Aug 2025 650th snoozingnewt 🇺🇸 512 129 13 days ago 651st nephila-nacrea 🇬🇧 510 77 2 Oct 2024 652nd travisdoesmath 510 156 26 days ago 652nd Shotokhan 510 156 12 days ago 654th dokutan 509 143 19 Oct 2024 655th KatieLG 🇬🇧 509 146 2 Oct 2024 656th dokutan 507 126 22 Jun 2025 657th Chinay-Domitrix 🇺🇸 507 131 30 Mar 2025 658th msbranicky 507 138 3 Oct 2024 659th lhulinsky 507 157 21 Oct 2024 660th dokutan 506 116 30 Aug 2025 661st KatieLG 🇬🇧 506 140 1 Oct 2024 662nd yoshykai 506 183 12 Apr 2025 663rd ThatAlo 504 158 9 Dec 2024 664th albanian-laundromat 501 88 2 Jul 2025 665th MeWhenI 🇻🇦 499 149 4 Oct 2024 666th Mabeloid 🇳🇴 497 133 2 Oct 2024 667th jlangvand 497 141 15 Oct 2024 667th HumanoidCPU 497 141 7 Mar 2025 669th CheeseCake628 🇳🇴 497 160 5 Nov 2024 670th janAkali 🇷🇺 497 167 8 Oct 2024 671st pres-abhisheksinha 494 161 8 Oct 2024 672nd TheRealOhead 🇺🇸 491 131 1 Oct 2024 673rd ibixina 491 162 13 Oct 2024 673rd TheAtrossian 491 162 5 Jan 2025 675th HumanoidCPU 489 145 5 Oct 2024 First Prev 601–675 of 767 Next Last