Card Number Validation in all languages in chars. Achievements Cheevos Holes Languages Medals Miscellaneous 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Minesweeper Morse Decoder Morse Encoder Multitap Input 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 Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Minesweeper Morse Decoder Morse Encoder Multitap Input 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 Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 641st KatieLG 🇬🇧 576 99 1,400ms 1 Oct 2024 642nd 823126 576 112 10ms 13 Nov 2024 642nd snoozingnewt 🇨🇦 576 112 11ms 2 Nov 2025 644th MeWhenI 🇻🇦 572 164 196ms 6 Oct 2024 645th janAkali 🇷🇺 571 147 355ms 10 Mar 2026 646th Mabeloid 🇳🇴 570 121 1ms 21 Oct 2025 647th jusaka 565 102 465ms 7 days ago 648th denkyuu1 564 100 354ms 3 days ago 649th aliakseikalosha 563 127 488ms 10 Oct 2024 650th jipsong 🇩🇪 562 115 18ms 12 May 2025 651st jgbaldwinbrown 561 123 2ms 14 Jan 2026 652nd dokutan 561 155 446ms 10 Feb 2026 653rd ravnskjaer 🇩🇰 560 167 455ms 15 Dec 2025 654th rowechenzhong 557 116 17ms 17 Oct 2024 655th CaedenHarper 🇨🇦 556 104 1,098ms 24 Nov 2025 656th madex 🇩🇪 556 116 16ms 1 Oct 2024 657th edsrzf 🇳🇿 554 135 6ms 27 Feb 2025 658th snoozingnewt 🇨🇦 554 148 132ms 20 Nov 2025 659th msbranicky 554 185 4ms 20 Jan 2025 660th FortuiteMan 🇫🇷 554 270 44ms 22 Nov 2025 661st MeWhenI 🇻🇦 554 290 8ms 2 Oct 2024 662nd dtbao20 🇻🇳 553 117 19ms 1 Oct 2024 662nd Pyroan 553 117 18ms 22 Feb 2025 662nd vgamula 🇺🇦 553 117 17ms 5 Aug 2025 662nd FortuiteMan 🇫🇷 553 117 18ms 1 Dec 2025 662nd yujqiao 553 117 25ms 16 Dec 2025 667th gpikmddk 550 130 599ms 30 Oct 2025 668th ethanlally 550 170 377ms 19 Nov 2025 668th snoozingnewt 🇨🇦 550 170 485ms 5 Dec 2025 670th JDiLenarda 🇫🇷 549 165 1,630ms 1 Oct 2024 671st xyangst 549 171 179ms 1 Oct 2024 672nd KatieLG 🇬🇧 548 105 635ms 11 Feb 2026 673rd elgan65536 🇺🇸 548 118 11ms 2 Oct 2024 673rd logvp 548 118 18ms 6 Oct 2024 673rd ahmetdemirag 🇨🇾 548 118 10ms 6 Feb 2025 673rd dirckvdende 548 118 17ms 10 Jul 2025 677th zakariamouhid 547 118 12ms 1 Oct 2024 678th kmathis22 547 171 350ms 19 Nov 2025 679th najs91 546 131 401ms 15 Oct 2024 679th bac0id 546 131 444ms 9 Jan 2025 679th CaedenHarper 🇨🇦 546 131 409ms 17 Oct 2025 682nd jtaxen 543 119 18ms 21 Oct 2024 682nd psbpsbp 543 119 9ms 19 Dec 2024 682nd klixel 🇨🇦 543 119 10ms 9 Apr 2025 682nd vhoulbreque 🇫🇷 543 119 16ms 21 Nov 2025 686th eranws 542 119 11ms 23 Dec 2024 687th Sciman101 540 147 2ms 26 Mar 2025 688th TaserTheFox 🇺🇸 539 120 18ms 8 Oct 2024 688th yokasuretsu 539 120 11ms 26 Jan 2025 688th Troon 539 120 10ms 17 Feb 2025 691st mousetail 🇳🇱 539 128 2ms 3 Oct 2024 692nd msbranicky 536 175 161ms 13 Dec 2024 693rd JRaspass 🇬🇧 534 74 3ms 24 Mar 2026 694th BREMAUCY 🇫🇷 534 121 17ms 18 Jul 2025 694th retrohun 534 121 10ms 21 Mar 2026 696th deancureton 533 121 11ms 30 Dec 2024 697th msbranicky 531 126 2,625ms 9 Jan 2025 698th jusaka 531 176 402ms 8 days ago 699th chartung17 530 122 10ms 24 Mar 2025 700th Protothor 529 122 10ms 10 Mar 2026 701st dokutan 527 131 2ms 10 Feb 2026 702nd msbranicky 526 123 17ms 3 Oct 2024 702nd bobbysq 526 123 12ms 5 Oct 2024 702nd wuzekai518 526 123 10ms 8 Oct 2024 702nd denkyuu1 526 123 16ms 10 Mar 2026 702nd fuzzylojik-golf 🇺🇸 526 123 17ms 27 days ago 707th Macweese 525 178 405ms 3 Aug 2025 708th galloj 🇨🇿 522 112 22ms 4 Oct 2024 709th NotEvenIndian 522 124 14ms 22 Oct 2024 709th ridingqwerty 🇺🇸 522 124 20ms 16 Jan 2025 709th CommandLeo 🇮🇹 522 124 11ms 5 Oct 2025 712th snoozingnewt 🇨🇦 522 213 138ms 2 Nov 2025 713th bac0id 519 180 388ms 9 Jan 2025 714th sidok 517 109 235ms 13 Nov 2024 715th bnic24 517 125 18ms 3 Oct 2024 715th adoxography 517 125 10ms 22 Oct 2024 715th lelbal 517 125 10ms 14 Oct 2025 718th dokutan 517 143 210ms 19 Oct 2024 719th nephila-nacrea 🇬🇧 513 77 4ms 2 Oct 2024 720th emgordon154 513 156 9ms 13 Dec 2024 First Prev 641–720 of 1,004 Next Last