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 601st KatieLG 🇬🇧 550 120 1 Oct 2024 602nd msbranicky 550 185 20 Jan 2025 603rd JunkIce 548 145 3 Dec 2024 603rd Flekay 🇩🇪 548 145 10 Jul 2025 605th mousetail 🇳🇱 547 94 3 Oct 2024 606th mousetail 🇳🇱 547 128 3 Oct 2024 607th emgordon154 546 52 3 Nov 2024 608th zakariamouhid 544 118 1 Oct 2024 609th croc54 544 146 15 Dec 2024 610th xyangst 543 171 1 Oct 2024 611th dokutan 541 122 19 Oct 2024 612th PyryL 🇫🇮 541 147 1 Mar 2025 613th eranws 540 119 23 Dec 2024 614th najs91 540 131 15 Oct 2024 614th bac0id 540 131 9 Jan 2025 616th mbittner20 537 148 13 Oct 2024 617th Sciman101 536 147 26 Mar 2025 618th psaban 533 149 10 days ago 619th deancureton 531 121 30 Dec 2024 620th msbranicky 531 175 13 Dec 2024 621st FlorianCassayre 🇫🇷 530 150 1 Oct 2024 621st jameswmccarty 530 150 5 Oct 2024 621st yousefalizadeh 530 150 23 Oct 2024 621st feherd 530 150 31 Oct 2024 621st TheZwierzLF 🇵🇱 530 150 17 May 2025 626th msbranicky 527 126 9 Jan 2025 627th adamnielson42 🇺🇸 523 152 6 Oct 2024 627th voidgloom 523 152 22 Oct 2024 629th galloj 🇨🇿 522 112 4 Oct 2024 630th xyangst 519 153 1 Oct 2024 631st sidok 514 109 13 Nov 2024 632nd FortuiteMan 513 155 16 Oct 2024 633rd nephila-nacrea 🇬🇧 510 77 2 Oct 2024 634th dokutan 509 143 19 Oct 2024 635th KatieLG 🇬🇧 509 146 2 Oct 2024 636th dokutan 507 126 22 Jun 2025 637th Chinay-Domitrix 🇺🇸 507 131 30 Mar 2025 638th msbranicky 507 138 3 Oct 2024 639th KatieLG 🇬🇧 506 140 1 Oct 2024 640th lhulinsky 506 157 21 Oct 2024 641st ThatAlo 503 158 9 Dec 2024 642nd albanian-laundromat 499 88 2 Jul 2025 643rd MeWhenI 🇻🇦 499 149 4 Oct 2024 644th CheeseCake628 🇳🇴 497 160 5 Nov 2024 644th osNiko 🇧🇷 497 160 10 days ago 646th janAkali 🇷🇺 497 167 8 Oct 2024 647th Mabeloid 🇳🇴 496 133 2 Oct 2024 648th jlangvand 496 141 15 Oct 2024 648th HumanoidCPU 496 141 7 Mar 2025 650th pres-abhisheksinha 494 161 8 Oct 2024 651st ibixina 491 162 13 Oct 2024 651st TheAtrossian 491 162 5 Jan 2025 653rd TheRealOhead 🇺🇸 490 131 1 Oct 2024 654th HumanoidCPU 488 145 5 Oct 2024 655th JunkIce 485 136 3 Dec 2024 656th h-hh-hhh 🇺🇦 484 177 2 Nov 2024 657th Mabeloid 🇳🇴 483 145 2 Oct 2024 658th snoozingnewt 🇺🇸 482 137 27 Jan 2025 659th Vaekor 482 165 15 Dec 2024 659th mossiegoat 482 165 25 days ago 661st alphafalfa 477 92 8 Nov 2024 662nd KatieLG 🇬🇧 476 108 13 Oct 2024 663rd h-hh-hhh 🇺🇦 476 147 2 Nov 2024 664th mitzal 476 180 9 Feb 2025 665th MiffOttah 472 150 6 Oct 2024 666th Maximizer02 471 201 1 Oct 2024 667th JesseNoEyes 🇺🇸 470 169 1 Oct 2024 668th ejini6969 468 102 14 Jun 2025 669th zyc-2024 🇨🇳 468 170 5 Oct 2024 670th ComputerKWasTaken 🇺🇸 465 171 14 Oct 2024 671st Yewzir 🇧🇪 460 171 26 Dec 2024 672nd madex 🇩🇪 459 104 2 Oct 2024 673rd clayboll99 452 176 10 Jul 2025 674th dokutan 451 63 26 Nov 2024 675th IISResetMe 449 104 27 Mar 2025 Prev 601–675 of 734 Next