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 561st alemelis 604 93 477ms 1 Oct 2024 562nd commandz0 🇺🇸 604 107 17ms 7 Oct 2024 562nd zbreit 🇺🇸 604 107 17ms 29 Oct 2024 562nd StardustGogeta 604 107 19ms 30 Oct 2024 562nd ZakkkkAttackkkk 🇵🇭 604 107 16ms 8 Feb 2025 562nd InigoK 🇺🇸 604 107 17ms 22 Sep 2025 567th jupj 🇫🇮 604 114 2ms 20 Jul 2025 568th neihousaigaai 598 108 17ms 4 Oct 2024 568th StefanHabel 🇨🇦 598 108 15ms 23 Jan 2025 568th CaedenHarper 🇨🇦 598 108 17ms 22 Jul 2025 571st MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 572nd dokutan 596 116 2ms 19 Nov 2025 573rd MeWhenI 🇻🇦 595 73 2ms 2 Oct 2024 574th arcpolaris 595 120 396ms 28 Jan 2025 575th SirBogman 🇺🇸 593 64 118ms 11 Jul 2025 576th roguh 🇬🇹 588 117 1ms 13 Oct 2024 576th iczelia 🇩🇪 588 117 2ms 25 Sep 2025 578th DialFrost 🇸🇬 587 67 8ms 25 Jan 2025 579th JunkIce 587 98 416ms 3 Dec 2024 579th commandz0 🇺🇸 587 98 505ms 1 Sep 2025 581st cros107 🇦🇺 587 110 18ms 1 Jan 2025 581st guilhem-roy 🇫🇷 587 110 17ms 29 May 2025 581st Lv0Sys 🇵🇱 587 110 17ms 10 Dec 2025 584th Schmitt-Very-Cool 587 159 445ms 26 Sep 2025 585th gigaprofisi 🇺🇸 585 110 10ms 11 Aug 2025 586th amazingalek 🇳🇴 585 122 458ms 1 Jan 2026 587th dokutan 584 174 5ms 21 Feb 2025 588th mousetail 🇳🇱 582 111 17ms 6 Oct 2024 589th michelebastione 🇮🇹 580 123 418ms 26 Aug 2025 590th emgordon154 579 49 3ms 9 Dec 2025 591st dokutan 578 102 1,094ms 30 Aug 2025 592nd MeWhenI 🇻🇦 578 111 88ms 2 Oct 2024 593rd bac0id 578 119 2ms 10 Jan 2025 594th OllieBoyne 🇬🇧 577 112 17ms 17 Oct 2024 594th WillConker 577 112 12ms 22 Oct 2024 594th maxgodfrey2004 🇨🇦 577 112 10ms 4 Jan 2025 597th MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 598th CaedenHarper 🇨🇦 575 100 517ms 22 Jul 2025 599th 823126 575 112 10ms 13 Nov 2024 599th snoozingnewt 🇨🇦 575 112 10ms 2 Nov 2025 601st KatieLG 🇬🇧 574 99 1,368ms 1 Oct 2024 602nd Mabeloid 🇳🇴 569 121 1ms 21 Oct 2025 603rd MeWhenI 🇻🇦 569 164 194ms 6 Oct 2024 604th CaedenHarper 🇨🇦 567 104 1,139ms 24 Nov 2025 605th albanian-laundromat 564 77 2ms 3 Nov 2025 606th jipsong 🇩🇪 562 115 16ms 12 May 2025 607th aliakseikalosha 562 127 487ms 10 Oct 2024 608th dokutan 561 155 396ms 40 hours ago 609th jgbaldwinbrown 560 123 2ms 14 Jan 2026 610th ravnskjaer 🇩🇰 559 167 455ms 15 Dec 2025 611th rowechenzhong 557 116 10ms 17 Oct 2024 612th madex 🇩🇪 555 116 9ms 1 Oct 2024 613th FortuiteMan 🇫🇷 554 270 36ms 22 Nov 2025 614th MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 615th JDiLenarda 🇫🇷 553 165 1,573ms 1 Oct 2024 616th dtbao20 🇻🇳 552 117 18ms 1 Oct 2024 616th Pyroan 552 117 17ms 22 Feb 2025 616th vgamula 🇺🇦 552 117 16ms 5 Aug 2025 616th FortuiteMan 🇫🇷 552 117 17ms 1 Dec 2025 616th yujqiao 552 117 17ms 16 Dec 2025 621st snoozingnewt 🇨🇦 552 148 121ms 20 Nov 2025 622nd edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 623rd msbranicky 550 185 4ms 20 Jan 2025 624th gpikmddk 549 130 464ms 30 Oct 2025 625th ethanlally 549 170 377ms 19 Nov 2025 625th snoozingnewt 🇨🇦 549 170 485ms 5 Dec 2025 627th elgan65536 🇺🇸 548 118 13ms 2 Oct 2024 627th logvp 548 118 17ms 6 Oct 2024 627th ahmetdemirag 🇨🇾 548 118 10ms 6 Feb 2025 627th dirckvdende 548 118 17ms 10 Jul 2025 631st KatieLG 🇬🇧 547 105 439ms 24 hours ago 632nd zakariamouhid 546 118 11ms 1 Oct 2024 633rd kmathis22 546 171 350ms 19 Nov 2025 634th najs91 545 131 444ms 15 Oct 2024 634th bac0id 545 131 486ms 9 Jan 2025 634th CaedenHarper 🇨🇦 545 131 407ms 17 Oct 2025 637th xyangst 545 171 176ms 1 Oct 2024 638th jtaxen 543 119 17ms 21 Oct 2024 638th psbpsbp 543 119 10ms 19 Dec 2024 638th klixel 🇨🇦 543 119 11ms 9 Apr 2025 First Prev 561–640 of 884 Next Last