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 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 Calendar 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 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 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 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 Calendar 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 601st msbranicky 550 185 4ms 20 Jan 2025 602nd ethanlally 549 170 402ms 27 days ago 602nd snoozingnewt 🇨🇦 549 170 435ms 10 days ago 604th gpikmddk 548 130 421ms 30 Oct 2025 605th elgan65536 547 118 10ms 2 Oct 2024 605th logvp 547 118 15ms 6 Oct 2024 605th ahmetdemirag 🇨🇾 547 118 9ms 6 Feb 2025 605th dirckvdende 547 118 19ms 10 Jul 2025 605th yujqiao 547 118 17ms 11 hours ago 610th zakariamouhid 545 118 9ms 1 Oct 2024 610th JOrE20 🇺🇸 545 118 9ms 14 days ago 612th xyangst 545 171 165ms 1 Oct 2024 612th kmathis22 545 171 430ms 26 days ago 614th najs91 544 131 374ms 15 Oct 2024 614th bac0id 544 131 394ms 9 Jan 2025 614th CaedenHarper 🇨🇦 544 131 375ms 17 Oct 2025 617th jtaxen 543 119 15ms 21 Oct 2024 617th psbpsbp 543 119 9ms 19 Dec 2024 617th klixel 🇨🇦 543 119 9ms 9 Apr 2025 617th vhoulbreque 🇫🇷 543 119 9ms 24 days ago 621st eranws 541 119 9ms 23 Dec 2024 622nd Sciman101 539 147 2ms 26 Mar 2025 623rd TaserTheFox 🇺🇸 538 120 16ms 8 Oct 2024 623rd yokasuretsu 538 120 10ms 26 Jan 2025 623rd Troon 538 120 10ms 17 Feb 2025 626th mousetail 🇳🇱 536 128 2ms 3 Oct 2024 627th BREMAUCY 🇫🇷 534 121 16ms 18 Jul 2025 628th msbranicky 533 175 156ms 13 Dec 2024 629th deancureton 532 121 9ms 30 Dec 2024 630th chartung17 529 122 10ms 24 Mar 2025 631st msbranicky 528 126 2,981ms 9 Jan 2025 632nd blaztoma 🇱🇹 526 154 127ms 17 days ago 633rd msbranicky 525 123 17ms 3 Oct 2024 633rd bobbysq 525 123 10ms 5 Oct 2024 633rd wuzekai518 525 123 10ms 8 Oct 2024 636th Macweese 524 178 382ms 3 Aug 2025 637th galloj 🇨🇿 522 112 19ms 4 Oct 2024 638th NotEvenIndian 521 124 10ms 22 Oct 2024 638th ridingqwerty 🇺🇸 521 124 16ms 16 Jan 2025 638th CommandLeo 🇮🇹 521 124 9ms 5 Oct 2025 641st snoozingnewt 🇨🇦 519 213 138ms 2 Nov 2025 642nd bac0id 518 180 370ms 9 Jan 2025 643rd bnic24 517 125 16ms 3 Oct 2024 643rd adoxography 517 125 11ms 22 Oct 2024 643rd lelbal 517 125 9ms 14 Oct 2025 646th sidok 515 109 247ms 13 Nov 2024 647th dokutan 514 143 128ms 19 Oct 2024 648th emgordon154 511 156 9ms 13 Dec 2024 649th nephila-nacrea 🇬🇧 510 77 3ms 2 Oct 2024 650th yoshykai 510 183 364ms 12 Apr 2025 651st CatsAreFluffy 509 127 15ms 30 Oct 2024 651st WillowWispy 509 127 10ms 25 May 2025 653rd KatieLG 🇬🇧 509 140 392ms 1 Oct 2024 654th KatieLG 🇬🇧 509 146 9ms 2 Oct 2024 655th Chinay-Domitrix 🇺🇸 508 131 3,327ms 30 Mar 2025 656th madex 🇩🇪 501 129 16ms 2 Oct 2024 656th RedzGoose 🇦🇺 501 129 13ms 15 Oct 2024 656th calebaitken 501 129 9ms 11 Apr 2025 656th rollershutter 501 129 17ms 26 days ago 660th msbranicky 501 138 3ms 3 Oct 2024 661st snoozingnewt 🇨🇦 501 142 416ms 2 Nov 2025 662nd MeWhenI 🇻🇦 499 149 55ms 4 Oct 2024 663rd janAkali 🇷🇺 499 167 357ms 8 Oct 2024 664th Europe2048 497 130 9ms 2 Oct 2024 664th nstearns96 🇬🇧 497 130 16ms 2 Oct 2024 664th Stockoh 🇫🇷 497 130 16ms 4 Jul 2025 667th inverseLorentz 🇦🇺 493 131 9ms 7 Oct 2024 667th sciencejiho 493 131 16ms 11 Feb 2025 667th Jaydosu 493 131 9ms 11 Apr 2025 667th Emutis 🇱🇹 493 131 9ms 11 Nov 2025 671st CarterStroik 493 161 2ms 27 days ago 672nd TheRealOhead 🇺🇸 491 131 9ms 1 Oct 2024 673rd HumanoidCPU 491 145 394ms 5 Oct 2024 674th snoozingnewt 🇨🇦 490 150 129ms 2 Nov 2025 675th h-hh-hhh 🇺🇦 487 177 56ms 2 Nov 2024 First Prev 601–675 of 845 Next Last