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 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 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 Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> 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 ALGOL 68 APL ArkScript 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 ><> 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 ALGOL 68 APL ArkScript 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 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 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 Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 557th InigoK 🇺🇸 604 107 17ms 22 Sep 2025 562nd jupj 🇫🇮 603 114 2ms 20 Jul 2025 563rd neihousaigaai 598 108 17ms 4 Oct 2024 563rd StefanHabel 🇨🇦 598 108 15ms 23 Jan 2025 563rd CaedenHarper 🇨🇦 598 108 17ms 22 Jul 2025 566th MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 567th dokutan 596 116 2ms 19 Nov 2025 568th MeWhenI 🇻🇦 595 73 2ms 2 Oct 2024 569th arcpolaris 595 120 396ms 28 Jan 2025 570th SirBogman 🇺🇸 593 64 118ms 11 Jul 2025 571st roguh 🇬🇹 588 117 1ms 13 Oct 2024 571st iczelia 🇩🇪 588 117 2ms 25 Sep 2025 573rd DialFrost 🇸🇬 587 67 8ms 25 Jan 2025 574th JunkIce 587 98 416ms 3 Dec 2024 574th commandz0 🇺🇸 587 98 505ms 1 Sep 2025 576th cros107 🇦🇺 587 110 18ms 1 Jan 2025 576th guilhem-roy 🇫🇷 587 110 17ms 29 May 2025 576th Lv0Sys 🇵🇱 587 110 17ms 10 Dec 2025 579th Schmitt-Very-Cool 587 159 445ms 26 Sep 2025 580th gigaprofisi 🇺🇸 585 110 9ms 11 Aug 2025 581st amazingalek 🇳🇴 585 122 458ms 1 Jan 2026 582nd dokutan 584 174 5ms 21 Feb 2025 583rd mousetail 🇳🇱 582 111 17ms 6 Oct 2024 584th michelebastione 🇮🇹 580 123 418ms 26 Aug 2025 585th emgordon154 579 49 3ms 9 Dec 2025 586th dokutan 578 102 1,094ms 30 Aug 2025 587th MeWhenI 🇻🇦 578 111 88ms 2 Oct 2024 588th bac0id 578 119 2ms 10 Jan 2025 589th OllieBoyne 🇬🇧 577 112 17ms 17 Oct 2024 589th WillConker 577 112 12ms 22 Oct 2024 589th maxgodfrey2004 🇨🇦 577 112 10ms 4 Jan 2025 592nd MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 593rd CaedenHarper 🇨🇦 575 100 517ms 22 Jul 2025 594th 823126 575 112 9ms 13 Nov 2024 594th snoozingnewt 🇨🇦 575 112 9ms 2 Nov 2025 596th KatieLG 🇬🇧 574 99 1,368ms 1 Oct 2024 597th Mabeloid 🇳🇴 569 121 1ms 21 Oct 2025 598th MeWhenI 🇻🇦 569 164 194ms 6 Oct 2024 599th CaedenHarper 🇨🇦 567 104 1,139ms 24 Nov 2025 600th albanian-laundromat 564 77 2ms 3 Nov 2025 601st jipsong 🇩🇪 562 115 16ms 12 May 2025 602nd aliakseikalosha 562 127 487ms 10 Oct 2024 603rd jgbaldwinbrown 559 123 2ms 24 days ago 604th ravnskjaer 🇩🇰 559 167 455ms 15 Dec 2025 605th rowechenzhong 557 116 10ms 17 Oct 2024 606th madex 🇩🇪 555 116 10ms 1 Oct 2024 607th FortuiteMan 🇫🇷 554 270 36ms 22 Nov 2025 608th MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 609th JDiLenarda 🇫🇷 553 165 1,573ms 1 Oct 2024 610th dtbao20 🇻🇳 552 117 18ms 1 Oct 2024 610th Pyroan 552 117 17ms 22 Feb 2025 610th vgamula 🇺🇦 552 117 16ms 5 Aug 2025 610th FortuiteMan 🇫🇷 552 117 17ms 1 Dec 2025 610th yujqiao 552 117 17ms 16 Dec 2025 615th snoozingnewt 🇨🇦 552 148 121ms 20 Nov 2025 616th edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 617th msbranicky 550 185 4ms 20 Jan 2025 618th gpikmddk 549 130 464ms 30 Oct 2025 619th ethanlally 549 170 377ms 19 Nov 2025 619th snoozingnewt 🇨🇦 549 170 485ms 5 Dec 2025 621st elgan65536 548 118 13ms 2 Oct 2024 621st logvp 548 118 17ms 6 Oct 2024 621st ahmetdemirag 🇨🇾 548 118 10ms 6 Feb 2025 621st dirckvdende 548 118 17ms 10 Jul 2025 625th kmathis22 546 171 350ms 19 Nov 2025 626th zakariamouhid 545 118 9ms 1 Oct 2024 627th najs91 545 131 444ms 15 Oct 2024 627th bac0id 545 131 486ms 9 Jan 2025 627th CaedenHarper 🇨🇦 545 131 407ms 17 Oct 2025 630th xyangst 545 171 176ms 1 Oct 2024 631st jtaxen 543 119 17ms 21 Oct 2024 631st psbpsbp 543 119 10ms 19 Dec 2024 631st klixel 🇨🇦 543 119 11ms 9 Apr 2025 631st vhoulbreque 🇫🇷 543 119 10ms 21 Nov 2025 635th eranws 541 119 10ms 23 Dec 2024 636th Sciman101 539 147 2ms 26 Mar 2025 637th TaserTheFox 🇺🇸 538 120 17ms 8 Oct 2024 637th yokasuretsu 538 120 11ms 26 Jan 2025 637th Troon 538 120 11ms 17 Feb 2025 640th mousetail 🇳🇱 537 128 2ms 3 Oct 2024 First Prev 561–640 of 875 Next Last