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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 BambooleanLogic 🇸🇪 657 98 10ms 21 Oct 2024 482nd error256 657 142 166ms 31 May 2025 483rd AlephSquirrel 657 146 4ms 14 May 2025 484th jwhear 🇺🇸 655 197 1,696ms 1 Oct 2024 485th Herbert00709 🇵🇱 654 105 2ms 14 Jun 2025 486th MeWhenI 🇻🇦 653 88 425ms 2 Oct 2024 487th SirBogman 🇺🇸 653 99 16ms 8 Oct 2024 488th voytxt 🇨🇿 651 89 141ms 17 Apr 2025 488th dokutan 651 89 120ms 28 Jun 2025 490th w911 651 183 251ms 7 Oct 2024 491st albanian-laundromat 651 293 14ms 8 Dec 2025 492nd dokutan 650 99 10ms 28 Jun 2025 493rd DialFrost 🇸🇬 648 67 2ms 22 Dec 2024 494th MeWhenI 🇻🇦 648 91 994ms 29 Aug 2025 495th rniii 648 106 1ms 2 Oct 2024 495th gastropner 648 106 2ms 11 Feb 2025 497th rucin93 🇵🇱 648 144 151ms 28 Oct 2024 498th FlorianCassayre 🇫🇷 646 100 16ms 1 Oct 2024 498th bzijlema 🇳🇱 646 100 16ms 10 Oct 2024 498th bricknellj 646 100 16ms 4 Mar 2025 501st CaedenHarper 🇨🇦 644 100 9ms 22 Aug 2025 501st iczelia 🇩🇪 644 100 9ms 11 Oct 2025 501st Yax42 🇫🇷 644 100 10ms 27 Nov 2025 504th koipondx86 644 123 2ms 8 Nov 2024 505th Apataras 644 145 414ms 25 Jun 2025 506th tomh1012 643 111 539ms 8 Sep 2025 507th Shanethegamer 🇺🇸 643 124 6ms 4 Oct 2024 508th btjones0 640 101 16ms 2 Dec 2024 509th dokutan 640 146 379ms 23 Nov 2025 510th stefangimmillaro 639 73 331ms 1 Oct 2024 511th elgan65536 639 146 153ms 2 Oct 2024 511th luuumine 🇫🇷 639 146 147ms 26 Nov 2025 513th MeWhenI 🇻🇦 638 73 8ms 3 Oct 2024 514th msbranicky 634 188 252ms 7 Jan 2025 515th annaproxy 633 102 16ms 1 Oct 2024 515th xyangst 633 102 10ms 1 Oct 2024 515th solisolu 633 102 10ms 31 Dec 2025 518th dokutan 632 91 378ms 19 Oct 2024 519th Shanethegamer 🇺🇸 631 74 287ms 16 Oct 2024 520th Florian-Mt 631 102 9ms 5 Dec 2025 521st albanian-laundromat 631 264 1,424ms 3 Nov 2025 522nd robin-scragg 627 103 11ms 21 Aug 2025 523rd DialFrost 🇸🇬 627 304 153ms 13 Aug 2025 524th AlephSquirrel 625 40 43ms 1 Oct 2024 525th Jonatan6 🇩🇰 625 110 2ms 24 Oct 2024 525th solisolu 625 110 2ms 25 Nov 2025 527th dokutan 623 127 2ms 10 Dec 2024 528th codereport 🇨🇦 619 63 33ms 2 Oct 2024 529th BalaM314 619 104 9ms 4 Feb 2025 529th acollett89 619 104 10ms 15 Jul 2025 531st Yax42 🇫🇷 619 111 2ms 21 days ago 532nd SirBogman 🇺🇸 618 93 405ms 23 Jul 2025 533rd MarcMush 🇫🇷 617 91 764ms 8 Oct 2024 534th Ripick 617 135 346ms 23 Mar 2025 535th fourth-bit 615 105 19ms 1 Oct 2024 535th jared-hughes 615 105 15ms 3 Oct 2024 535th mattyhempstead 615 105 27ms 7 Oct 2024 538th olleicua 🇺🇸 613 78 35ms 18 Oct 2024 539th bac0id 613 141 405ms 10 Jan 2025 540th evnu 612 147 86ms 12 Oct 2025 541st Seanharrs 610 117 471ms 15 Nov 2024 542nd davecame 609 106 15ms 1 Oct 2024 542nd starfihs 609 106 10ms 2 Oct 2024 542nd rschwa6308 🇺🇸 609 106 16ms 28 Oct 2024 542nd snydej 609 106 15ms 21 Nov 2024 542nd andrewjc2000 609 106 15ms 17 Jul 2025 542nd travisdoesmath 609 106 16ms 7 Sep 2025 548th kaascevich 609 134 121ms 9 Jul 2025 549th not-a-pokemon 608 113 2ms 23 Jul 2025 550th daveberlin 607 106 9ms 27 Jun 2025 551st Shanethegamer 🇺🇸 606 154 151ms 3 Oct 2024 552nd alemelis 604 93 448ms 1 Oct 2024 553rd commandz0 🇺🇸 604 107 15ms 7 Oct 2024 553rd zbreit 🇺🇸 604 107 16ms 29 Oct 2024 553rd StardustGogeta 604 107 16ms 30 Oct 2024 553rd ZakkkkAttackkkk 🇵🇭 604 107 16ms 8 Feb 2025 553rd InigoK 🇺🇸 604 107 16ms 22 Sep 2025 558th jupj 🇫🇮 603 114 2ms 20 Jul 2025 559th neihousaigaai 598 108 16ms 4 Oct 2024 559th StefanHabel 🇨🇦 598 108 16ms 23 Jan 2025 First Prev 481–560 of 866 Next Last