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 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 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 451st HumanoidCPU 670 96 9ms 7 Mar 2025 452nd error256 669 101 4ms 24 Oct 2024 453rd MeWhenI 🇻🇦 669 174 39ms 13 Feb 2025 454th madex 🇩🇪 666 103 1ms 2 Oct 2024 455th CaedenHarper 🇨🇦 666 140 692ms 3 Oct 2025 456th dbut2 🇦🇺 666 179 264ms 31 Oct 2024 457th emgordon154 665 111 4ms 12 Jan 2025 458th two-bad 🇬🇧 664 97 10ms 2 Oct 2024 458th LordSir101 664 97 10ms 10 Aug 2025 460th AlephSquirrel 664 146 3ms 14 May 2025 461st snoozingnewt 🇨🇦 662 180 268ms 2 Nov 2025 462nd 4hg 🇺🇸 661 59 34ms 5 Oct 2024 463rd BlankSpruce 660 104 2ms 1 Oct 2024 464th DialFrost 🇸🇬 659 67 2ms 22 Dec 2024 465th MeWhenI 🇻🇦 659 88 128ms 2 Oct 2024 465th Shanethegamer 🇺🇸 659 88 151ms 5 Oct 2024 467th GolfingSuccess 🇬🇷 659 98 16ms 5 Oct 2024 467th firegene 🇮🇪 659 98 18ms 21 Oct 2024 467th JunkIce 659 98 10ms 3 Dec 2024 470th BambooleanLogic 🇸🇪 657 98 9ms 21 Oct 2024 471st error256 657 142 159ms 31 May 2025 472nd jwhear 🇺🇸 655 197 1,696ms 1 Oct 2024 473rd MeWhenI 🇻🇦 653 88 504ms 2 Oct 2024 474th Herbert00709 🇵🇱 653 105 2ms 14 Jun 2025 475th SirBogman 🇺🇸 652 99 16ms 8 Oct 2024 476th voytxt 🇨🇿 651 89 132ms 17 Apr 2025 476th dokutan 651 89 119ms 28 Jun 2025 478th w911 651 183 268ms 7 Oct 2024 479th albanian-laundromat 651 293 15ms 14 hours ago 480th dokutan 650 99 8ms 28 Jun 2025 481st MeWhenI 🇻🇦 648 91 1,026ms 29 Aug 2025 482nd rucin93 🇵🇱 648 144 149ms 28 Oct 2024 483rd rniii 647 106 1ms 2 Oct 2024 483rd gastropner 647 106 2ms 11 Feb 2025 485th FlorianCassayre 🇫🇷 646 100 16ms 1 Oct 2024 485th bzijlema 🇳🇱 646 100 16ms 10 Oct 2024 485th bricknellj 646 100 16ms 4 Mar 2025 488th koipondx86 645 123 3ms 8 Nov 2024 489th CaedenHarper 🇨🇦 644 100 10ms 22 Aug 2025 489th iczelia 🇩🇪 644 100 9ms 11 Oct 2025 489th Yax42 🇫🇷 644 100 9ms 11 days ago 492nd Shanethegamer 🇺🇸 643 124 6ms 4 Oct 2024 493rd Apataras 643 145 381ms 25 Jun 2025 494th tomh1012 641 111 396ms 8 Sep 2025 495th stefangimmillaro 639 73 234ms 1 Oct 2024 496th btjones0 639 101 16ms 2 Dec 2024 497th elgan65536 639 146 154ms 2 Oct 2024 497th dokutan 639 146 382ms 14 days ago 497th luuumine 🇫🇷 639 146 245ms 12 days ago 500th MeWhenI 🇻🇦 638 73 8ms 3 Oct 2024 501st msbranicky 634 188 296ms 7 Jan 2025 502nd annaproxy 633 102 16ms 1 Oct 2024 502nd xyangst 633 102 10ms 1 Oct 2024 504th dokutan 632 91 345ms 19 Oct 2024 505th Shanethegamer 🇺🇸 631 74 230ms 16 Oct 2024 506th Florian-Mt 631 102 10ms 3 days ago 507th albanian-laundromat 631 264 444ms 3 Nov 2025 508th robin-scragg 627 103 11ms 21 Aug 2025 509th DialFrost 🇸🇬 627 304 149ms 13 Aug 2025 510th AlephSquirrel 625 40 39ms 1 Oct 2024 511th Jonatan6 🇩🇰 624 110 2ms 24 Oct 2024 511th solisolu 624 110 2ms 13 days ago 513th dokutan 624 127 2ms 10 Dec 2024 514th solisolu 621 104 9ms 23 days ago 515th codereport 🇨🇦 619 63 34ms 2 Oct 2024 516th BalaM314 619 104 9ms 4 Feb 2025 516th acollett89 619 104 9ms 15 Jul 2025 518th SirBogman 🇺🇸 618 93 384ms 23 Jul 2025 519th MarcMush 🇫🇷 617 91 737ms 8 Oct 2024 520th Ripick 617 135 346ms 23 Mar 2025 521st fourth-bit 615 105 19ms 1 Oct 2024 521st jared-hughes 615 105 15ms 3 Oct 2024 521st mattyhempstead 615 105 27ms 7 Oct 2024 524th olleicua 🇺🇸 612 78 33ms 18 Oct 2024 525th evnu 612 147 78ms 12 Oct 2025 First Prev 451–525 of 839 Next Last