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 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 Multitap Input 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 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 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 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 Multitap Input 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 561st arcpolaris 595 120 396ms 28 Jan 2025 562nd SirBogman 🇺🇸 591 64 122ms 11 Jul 2025 563rd DialFrost 🇸🇬 587 67 8ms 25 Jan 2025 564th JunkIce 587 98 373ms 3 Dec 2024 564th commandblockguy 🇺🇸 587 98 483ms 1 Sep 2025 566th cros107 🇦🇺 587 110 16ms 1 Jan 2025 566th guilhem-roy 🇫🇷 587 110 17ms 29 May 2025 566th Lv0Sys 🇵🇱 587 110 17ms 10 Dec 2025 569th roguh 🇬🇹 587 117 1ms 13 Oct 2024 569th iczelia 🇩🇪 587 117 2ms 25 Sep 2025 571st Schmitt-Very-Cool 586 159 440ms 26 Sep 2025 572nd gigaprofisi 🇺🇸 585 110 9ms 11 Aug 2025 573rd amazingalek 585 122 458ms 13 days ago 574th dokutan 584 174 5ms 21 Feb 2025 575th mousetail 🇳🇱 582 111 16ms 6 Oct 2024 576th michelebastione 🇮🇹 580 123 418ms 26 Aug 2025 577th emgordon154 579 49 3ms 9 Dec 2025 578th dokutan 578 102 785ms 30 Aug 2025 579th MeWhenI 🇻🇦 578 111 88ms 2 Oct 2024 580th OllieBoyne 🇬🇧 577 112 16ms 17 Oct 2024 580th WillConker 577 112 10ms 22 Oct 2024 580th maxgodfrey2004 🇨🇦 577 112 10ms 4 Jan 2025 583rd bac0id 577 119 2ms 10 Jan 2025 584th MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 585th CaedenHarper 🇨🇦 575 100 412ms 22 Jul 2025 586th 823126 575 112 9ms 13 Nov 2024 586th snoozingnewt 🇨🇦 575 112 9ms 2 Nov 2025 588th albanian-laundromat 574 77 2ms 3 Nov 2025 589th KatieLG 🇬🇧 574 99 1,081ms 1 Oct 2024 590th MeWhenI 🇻🇦 569 164 181ms 6 Oct 2024 591st CaedenHarper 🇨🇦 567 104 730ms 24 Nov 2025 592nd Mabeloid 🇳🇴 567 121 1ms 21 Oct 2025 593rd jipsong 🇩🇪 562 115 17ms 12 May 2025 594th aliakseikalosha 562 127 487ms 10 Oct 2024 595th jgbaldwinbrown 558 123 2ms 9 hours ago 596th ravnskjaer 🇩🇰 558 167 332ms 15 Dec 2025 597th rowechenzhong 557 116 9ms 17 Oct 2024 598th madex 🇩🇪 555 116 10ms 1 Oct 2024 599th FortuiteMan 🇫🇷 554 270 38ms 22 Nov 2025 600th MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 601st JDiLenarda 🇫🇷 553 165 1,573ms 1 Oct 2024 602nd dtbao20 🇻🇳 552 117 16ms 1 Oct 2024 602nd Pyroan 552 117 16ms 22 Feb 2025 602nd vgamula 🇺🇦 552 117 19ms 5 Aug 2025 602nd FortuiteMan 🇫🇷 552 117 20ms 1 Dec 2025 602nd yujqiao 552 117 16ms 16 Dec 2025 607th snoozingnewt 🇨🇦 552 148 121ms 20 Nov 2025 608th edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 609th msbranicky 550 185 4ms 20 Jan 2025 610th gpikmddk 549 130 464ms 30 Oct 2025 611th ethanlally 549 170 402ms 19 Nov 2025 611th snoozingnewt 🇨🇦 549 170 435ms 5 Dec 2025 613th elgan65536 547 118 10ms 2 Oct 2024 613th logvp 547 118 15ms 6 Oct 2024 613th ahmetdemirag 🇨🇾 547 118 9ms 6 Feb 2025 613th dirckvdende 547 118 19ms 10 Jul 2025 617th zakariamouhid 545 118 9ms 1 Oct 2024 617th JOrE20 🇺🇸 545 118 9ms 1 Dec 2025 619th najs91 545 131 444ms 15 Oct 2024 619th bac0id 545 131 486ms 9 Jan 2025 619th CaedenHarper 🇨🇦 545 131 407ms 17 Oct 2025 622nd xyangst 545 171 165ms 1 Oct 2024 622nd kmathis22 545 171 430ms 19 Nov 2025 624th jtaxen 543 119 15ms 21 Oct 2024 624th psbpsbp 543 119 9ms 19 Dec 2024 624th klixel 🇨🇦 543 119 9ms 9 Apr 2025 624th vhoulbreque 🇫🇷 543 119 9ms 21 Nov 2025 628th eranws 541 119 10ms 23 Dec 2024 629th TaserTheFox 🇺🇸 538 120 16ms 8 Oct 2024 629th yokasuretsu 538 120 10ms 26 Jan 2025 629th Troon 538 120 10ms 17 Feb 2025 632nd Sciman101 538 147 2ms 26 Mar 2025 633rd mousetail 🇳🇱 536 128 2ms 3 Oct 2024 634th BREMAUCY 🇫🇷 534 121 16ms 18 Jul 2025 635th msbranicky 533 175 156ms 13 Dec 2024 636th deancureton 532 121 9ms 30 Dec 2024 637th chartung17 529 122 10ms 24 Mar 2025 638th msbranicky 528 126 3,237ms 9 Jan 2025 639th msbranicky 525 123 17ms 3 Oct 2024 639th bobbysq 525 123 10ms 5 Oct 2024 First Prev 561–640 of 859 Next Last