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 481st jwhear 🇺🇸 655 197 1,696ms 1 Oct 2024 482nd MeWhenI 🇻🇦 653 88 425ms 2 Oct 2024 483rd SirBogman 🇺🇸 653 99 16ms 8 Oct 2024 484th Herbert00709 🇵🇱 653 105 2ms 14 Jun 2025 485th voytxt 🇨🇿 651 89 129ms 17 Apr 2025 485th dokutan 651 89 119ms 28 Jun 2025 487th w911 651 183 268ms 7 Oct 2024 488th albanian-laundromat 651 293 14ms 8 Dec 2025 489th dokutan 650 99 10ms 28 Jun 2025 490th MeWhenI 🇻🇦 648 91 704ms 29 Aug 2025 491st rucin93 🇵🇱 648 144 143ms 28 Oct 2024 492nd rniii 647 106 1ms 2 Oct 2024 492nd gastropner 647 106 2ms 11 Feb 2025 494th FlorianCassayre 🇫🇷 646 100 16ms 1 Oct 2024 494th bzijlema 🇳🇱 646 100 16ms 10 Oct 2024 494th bricknellj 646 100 16ms 4 Mar 2025 497th CaedenHarper 🇨🇦 644 100 13ms 22 Aug 2025 497th iczelia 🇩🇪 644 100 10ms 11 Oct 2025 497th Yax42 🇫🇷 644 100 10ms 27 Nov 2025 500th koipondx86 644 123 2ms 8 Nov 2024 501st tomh1012 643 111 424ms 8 Sep 2025 502nd Shanethegamer 🇺🇸 643 124 6ms 4 Oct 2024 503rd Apataras 643 145 381ms 25 Jun 2025 504th btjones0 640 101 16ms 2 Dec 2024 505th stefangimmillaro 639 73 281ms 1 Oct 2024 506th elgan65536 639 146 147ms 2 Oct 2024 506th dokutan 639 146 382ms 23 Nov 2025 506th luuumine 🇫🇷 639 146 146ms 26 Nov 2025 509th MeWhenI 🇻🇦 638 73 8ms 3 Oct 2024 510th msbranicky 634 188 296ms 7 Jan 2025 511th annaproxy 633 102 16ms 1 Oct 2024 511th xyangst 633 102 10ms 1 Oct 2024 511th solisolu 633 102 10ms 10 days ago 514th dokutan 632 91 458ms 19 Oct 2024 515th Shanethegamer 🇺🇸 631 74 252ms 16 Oct 2024 516th Florian-Mt 631 102 11ms 5 Dec 2025 517th albanian-laundromat 631 264 1,493ms 3 Nov 2025 518th robin-scragg 627 103 11ms 21 Aug 2025 519th DialFrost 🇸🇬 627 304 153ms 13 Aug 2025 520th AlephSquirrel 625 40 42ms 1 Oct 2024 521st Jonatan6 🇩🇰 624 110 2ms 24 Oct 2024 521st solisolu 624 110 2ms 25 Nov 2025 523rd dokutan 623 127 2ms 10 Dec 2024 524th codereport 🇨🇦 619 63 33ms 2 Oct 2024 525th BalaM314 619 104 10ms 4 Feb 2025 525th acollett89 619 104 10ms 15 Jul 2025 527th SirBogman 🇺🇸 618 93 405ms 23 Jul 2025 528th Yax42 🇫🇷 618 111 2ms 37 hours ago 529th MarcMush 🇫🇷 617 91 764ms 8 Oct 2024 530th Ripick 617 135 346ms 23 Mar 2025 531st fourth-bit 615 105 19ms 1 Oct 2024 531st jared-hughes 615 105 15ms 3 Oct 2024 531st mattyhempstead 615 105 27ms 7 Oct 2024 534th olleicua 🇺🇸 613 78 37ms 18 Oct 2024 535th bac0id 612 141 410ms 10 Jan 2025 536th evnu 612 147 80ms 12 Oct 2025 537th Seanharrs 610 117 470ms 15 Nov 2024 538th davecame 609 106 15ms 1 Oct 2024 538th starfihs 609 106 10ms 2 Oct 2024 538th rschwa6308 🇺🇸 609 106 16ms 28 Oct 2024 538th snydej 609 106 15ms 21 Nov 2024 538th andrewjc2000 609 106 15ms 17 Jul 2025 538th travisdoesmath 609 106 16ms 7 Sep 2025 544th kaascevich 609 134 121ms 9 Jul 2025 545th daveberlin 607 106 9ms 27 Jun 2025 546th not-a-pokemon 607 113 2ms 23 Jul 2025 547th Shanethegamer 🇺🇸 606 154 145ms 3 Oct 2024 548th MeWhenI 🇻🇦 605 73 2ms 2 Oct 2024 549th alemelis 604 93 448ms 1 Oct 2024 550th commandblockguy 🇺🇸 604 107 15ms 7 Oct 2024 550th zbreit 🇺🇸 604 107 16ms 29 Oct 2024 550th StardustGogeta 604 107 16ms 30 Oct 2024 550th ZakkkkAttackkkk 🇵🇭 604 107 16ms 8 Feb 2025 550th InigoK 🇺🇸 604 107 16ms 22 Sep 2025 555th jupj 🇫🇮 602 114 2ms 20 Jul 2025 556th neihousaigaai 598 108 16ms 4 Oct 2024 556th StefanHabel 🇨🇦 598 108 16ms 23 Jan 2025 556th CaedenHarper 🇨🇦 598 108 16ms 22 Jul 2025 559th MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 560th dokutan 596 116 2ms 19 Nov 2025 First Prev 481–560 of 856 Next Last