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 error256 657 142 154ms 31 May 2025 482nd AlephSquirrel 657 146 4ms 14 May 2025 483rd jwhear 🇺🇸 655 197 1,696ms 1 Oct 2024 484th Herbert00709 🇵🇱 654 105 2ms 14 Jun 2025 485th MeWhenI 🇻🇦 653 88 425ms 2 Oct 2024 486th SirBogman 🇺🇸 653 99 16ms 8 Oct 2024 487th voytxt 🇨🇿 651 89 151ms 17 Apr 2025 487th dokutan 651 89 120ms 28 Jun 2025 489th w911 651 183 251ms 7 Oct 2024 490th albanian-laundromat 651 293 14ms 8 Dec 2025 491st dokutan 650 99 10ms 28 Jun 2025 492nd MeWhenI 🇻🇦 648 91 704ms 29 Aug 2025 493rd rniii 648 106 1ms 2 Oct 2024 493rd gastropner 648 106 2ms 11 Feb 2025 495th rucin93 🇵🇱 648 144 143ms 28 Oct 2024 496th FlorianCassayre 🇫🇷 646 100 16ms 1 Oct 2024 496th bzijlema 🇳🇱 646 100 16ms 10 Oct 2024 496th bricknellj 646 100 16ms 4 Mar 2025 499th CaedenHarper 🇨🇦 644 100 9ms 22 Aug 2025 499th iczelia 🇩🇪 644 100 9ms 11 Oct 2025 499th Yax42 🇫🇷 644 100 10ms 27 Nov 2025 502nd koipondx86 644 123 2ms 8 Nov 2024 503rd Apataras 644 145 381ms 25 Jun 2025 504th tomh1012 643 111 539ms 8 Sep 2025 505th Shanethegamer 🇺🇸 643 124 6ms 4 Oct 2024 506th btjones0 640 101 16ms 2 Dec 2024 507th dokutan 640 146 382ms 23 Nov 2025 508th stefangimmillaro 639 73 331ms 1 Oct 2024 509th elgan65536 639 146 147ms 2 Oct 2024 509th luuumine 🇫🇷 639 146 146ms 26 Nov 2025 511th MeWhenI 🇻🇦 638 73 8ms 3 Oct 2024 512th msbranicky 634 188 252ms 7 Jan 2025 513th annaproxy 633 102 16ms 1 Oct 2024 513th xyangst 633 102 10ms 1 Oct 2024 513th solisolu 633 102 10ms 21 days ago 516th dokutan 632 91 378ms 19 Oct 2024 517th Shanethegamer 🇺🇸 631 74 287ms 16 Oct 2024 518th Florian-Mt 631 102 9ms 5 Dec 2025 519th albanian-laundromat 631 264 1,421ms 3 Nov 2025 520th robin-scragg 627 103 11ms 21 Aug 2025 521st DialFrost 🇸🇬 627 304 153ms 13 Aug 2025 522nd AlephSquirrel 625 40 43ms 1 Oct 2024 523rd Jonatan6 🇩🇰 624 110 2ms 24 Oct 2024 523rd solisolu 624 110 2ms 25 Nov 2025 525th dokutan 623 127 2ms 10 Dec 2024 526th codereport 🇨🇦 619 63 33ms 2 Oct 2024 527th BalaM314 619 104 9ms 4 Feb 2025 527th acollett89 619 104 10ms 15 Jul 2025 529th SirBogman 🇺🇸 618 93 405ms 23 Jul 2025 530th Yax42 🇫🇷 618 111 2ms 13 days ago 531st MarcMush 🇫🇷 617 91 764ms 8 Oct 2024 532nd Ripick 617 135 346ms 23 Mar 2025 533rd fourth-bit 615 105 19ms 1 Oct 2024 533rd jared-hughes 615 105 15ms 3 Oct 2024 533rd mattyhempstead 615 105 27ms 7 Oct 2024 536th olleicua 🇺🇸 613 78 35ms 18 Oct 2024 537th bac0id 612 141 405ms 10 Jan 2025 538th evnu 612 147 86ms 12 Oct 2025 539th Seanharrs 610 117 471ms 15 Nov 2024 540th davecame 609 106 15ms 1 Oct 2024 540th starfihs 609 106 10ms 2 Oct 2024 540th rschwa6308 🇺🇸 609 106 16ms 28 Oct 2024 540th snydej 609 106 15ms 21 Nov 2024 540th andrewjc2000 609 106 15ms 17 Jul 2025 540th travisdoesmath 609 106 16ms 7 Sep 2025 546th kaascevich 609 134 121ms 9 Jul 2025 547th not-a-pokemon 608 113 2ms 23 Jul 2025 548th daveberlin 607 106 9ms 27 Jun 2025 549th Shanethegamer 🇺🇸 606 154 145ms 3 Oct 2024 550th MeWhenI 🇻🇦 605 73 2ms 2 Oct 2024 551st alemelis 604 93 448ms 1 Oct 2024 552nd commandblockguy 🇺🇸 604 107 15ms 7 Oct 2024 552nd zbreit 🇺🇸 604 107 16ms 29 Oct 2024 552nd StardustGogeta 604 107 16ms 30 Oct 2024 552nd ZakkkkAttackkkk 🇵🇭 604 107 16ms 8 Feb 2025 552nd InigoK 🇺🇸 604 107 16ms 22 Sep 2025 557th jupj 🇫🇮 602 114 2ms 20 Jul 2025 558th neihousaigaai 598 108 16ms 4 Oct 2024 558th StefanHabel 🇨🇦 598 108 16ms 23 Jan 2025 558th CaedenHarper 🇨🇦 598 108 16ms 22 Jul 2025 First Prev 481–560 of 863 Next Last