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 MeWhenI 🇻🇦 554 290 2 Oct 2024 602nd JDiLenarda 🇫🇷 553 165 1 Oct 2024 603rd hiichbindermax 552 144 2 Oct 2024 603rd mathisfun271 552 144 14 Oct 2024 603rd bob-th 552 144 22 Oct 2024 606th edsrzf 🇳🇿 551 135 27 Feb 2025 607th KatieLG 🇬🇧 550 120 1 Oct 2024 608th msbranicky 550 185 20 Jan 2025 609th JunkIce 548 145 3 Dec 2024 609th Flekay 🇩🇪 548 145 10 Jul 2025 611th mousetail 🇳🇱 547 94 3 Oct 2024 612th mousetail 🇳🇱 547 128 3 Oct 2024 613th emgordon154 546 52 3 Nov 2024 614th zakariamouhid 545 118 1 Oct 2024 615th croc54 545 146 15 Dec 2024 616th xyangst 543 171 1 Oct 2024 617th dokutan 541 122 19 Oct 2024 618th najs91 541 131 15 Oct 2024 618th bac0id 541 131 9 Jan 2025 620th PyryL 🇫🇮 541 147 1 Mar 2025 621st eranws 540 119 23 Dec 2024 622nd mbittner20 537 148 13 Oct 2024 623rd Sciman101 536 147 26 Mar 2025 624th psaban 534 149 22 days ago 625th deancureton 531 121 30 Dec 2024 626th msbranicky 531 175 13 Dec 2024 627th FlorianCassayre 🇫🇷 530 150 1 Oct 2024 627th jameswmccarty 530 150 5 Oct 2024 627th yousefalizadeh 530 150 23 Oct 2024 627th feherd 530 150 31 Oct 2024 627th TheZwierzLF 🇵🇱 530 150 17 May 2025 632nd msbranicky 527 126 9 Jan 2025 633rd adamnielson42 🇺🇸 523 152 6 Oct 2024 633rd voidgloom 523 152 22 Oct 2024 635th galloj 🇨🇿 522 112 4 Oct 2024 636th xyangst 520 153 1 Oct 2024 636th denisfouchard 520 153 24 hours ago 638th osNiko 🇧🇷 516 154 45 hours ago 639th sidok 514 109 13 Nov 2024 640th FortuiteMan 513 155 16 Oct 2024 640th mossiegoat 513 155 35 hours ago 642nd nephila-nacrea 🇬🇧 510 77 2 Oct 2024 643rd dokutan 509 143 19 Oct 2024 644th KatieLG 🇬🇧 509 146 2 Oct 2024 645th dokutan 507 126 22 Jun 2025 646th Chinay-Domitrix 🇺🇸 507 131 30 Mar 2025 647th msbranicky 507 138 3 Oct 2024 648th KatieLG 🇬🇧 506 140 1 Oct 2024 649th lhulinsky 506 157 21 Oct 2024 650th ThatAlo 503 158 9 Dec 2024 651st albanian-laundromat 499 88 2 Jul 2025 652nd MeWhenI 🇻🇦 499 149 4 Oct 2024 653rd CheeseCake628 🇳🇴 497 160 5 Nov 2024 654th janAkali 🇷🇺 497 167 8 Oct 2024 655th Mabeloid 🇳🇴 496 133 2 Oct 2024 656th jlangvand 496 141 15 Oct 2024 656th HumanoidCPU 496 141 7 Mar 2025 658th pres-abhisheksinha 494 161 8 Oct 2024 659th TheRealOhead 🇺🇸 491 131 1 Oct 2024 660th ibixina 491 162 13 Oct 2024 660th TheAtrossian 491 162 5 Jan 2025 662nd HumanoidCPU 489 145 5 Oct 2024 663rd JunkIce 485 136 3 Dec 2024 664th h-hh-hhh 🇺🇦 484 177 2 Nov 2024 665th Mabeloid 🇳🇴 483 145 2 Oct 2024 666th snoozingnewt 🇺🇸 482 137 27 Jan 2025 667th Vaekor 482 165 15 Dec 2024 668th alphafalfa 477 92 8 Nov 2024 669th KatieLG 🇬🇧 476 108 13 Oct 2024 670th h-hh-hhh 🇺🇦 476 147 2 Nov 2024 671st mitzal 476 180 9 Feb 2025 672nd MiffOttah 473 150 6 Oct 2024 673rd Maximizer02 471 201 1 Oct 2024 674th JesseNoEyes 🇺🇸 470 169 1 Oct 2024 675th ejini6969 468 102 14 Jun 2025 Prev 601–675 of 743 Next