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 MeWhenI 🇻🇦 669 174 39ms 13 Feb 2025 452nd madex 🇩🇪 666 103 2ms 2 Oct 2024 453rd CaedenHarper 🇨🇦 666 140 336ms 3 Oct 2025 454th dbut2 🇦🇺 666 179 256ms 31 Oct 2024 455th emgordon154 665 111 4ms 12 Jan 2025 456th two-bad 🇬🇧 664 97 10ms 2 Oct 2024 456th LordSir101 664 97 10ms 10 Aug 2025 458th AlephSquirrel 664 146 4ms 14 May 2025 459th snoozingnewt 🇨🇦 662 180 258ms 2 Nov 2025 460th 4hg 🇺🇸 661 59 34ms 5 Oct 2024 461st DialFrost 🇸🇬 659 67 2ms 22 Dec 2024 462nd MeWhenI 🇻🇦 659 88 130ms 2 Oct 2024 462nd Shanethegamer 🇺🇸 659 88 132ms 5 Oct 2024 464th GolfingSuccess 🇬🇷 659 98 15ms 5 Oct 2024 464th firegene 🇮🇪 659 98 24ms 21 Oct 2024 464th JunkIce 659 98 10ms 3 Dec 2024 467th BlankSpruce 659 104 2ms 1 Oct 2024 468th BambooleanLogic 🇸🇪 657 98 9ms 21 Oct 2024 469th error256 657 142 159ms 31 May 2025 470th jwhear 🇺🇸 655 197 1,691ms 1 Oct 2024 471st MeWhenI 🇻🇦 653 88 561ms 2 Oct 2024 472nd Herbert00709 🇵🇱 653 105 2ms 14 Jun 2025 473rd SirBogman 🇺🇸 652 99 16ms 8 Oct 2024 474th voytxt 🇨🇿 651 89 132ms 17 Apr 2025 474th dokutan 651 89 117ms 28 Jun 2025 476th w911 651 183 257ms 7 Oct 2024 477th dokutan 650 99 8ms 28 Jun 2025 478th rucin93 🇵🇱 648 144 149ms 28 Oct 2024 479th rniii 647 106 2ms 2 Oct 2024 479th gastropner 647 106 2ms 11 Feb 2025 481st FlorianCassayre 🇫🇷 646 100 16ms 1 Oct 2024 481st bzijlema 🇳🇱 646 100 23ms 10 Oct 2024 481st bricknellj 646 100 26ms 4 Mar 2025 484th MeWhenI 🇻🇦 645 91 737ms 29 Aug 2025 485th koipondx86 645 123 3ms 8 Nov 2024 486th CaedenHarper 🇨🇦 644 100 10ms 22 Aug 2025 486th iczelia 🇩🇪 644 100 9ms 11 Oct 2025 486th Yax42 🇫🇷 644 100 9ms 8 days ago 489th Shanethegamer 🇺🇸 643 124 6ms 4 Oct 2024 490th Apataras 643 145 302ms 25 Jun 2025 491st tomh1012 641 111 396ms 8 Sep 2025 492nd stefangimmillaro 639 73 234ms 1 Oct 2024 493rd btjones0 639 101 18ms 2 Dec 2024 494th elgan65536 639 146 154ms 2 Oct 2024 494th dokutan 639 146 328ms 12 days ago 494th luuumine 🇫🇷 639 146 148ms 9 days ago 497th MeWhenI 🇻🇦 638 73 8ms 3 Oct 2024 498th msbranicky 634 188 267ms 7 Jan 2025 499th annaproxy 633 102 17ms 1 Oct 2024 499th xyangst 633 102 10ms 1 Oct 2024 501st dokutan 632 91 408ms 19 Oct 2024 502nd Shanethegamer 🇺🇸 631 74 230ms 16 Oct 2024 503rd Florian-Mt 631 102 10ms 4 hours ago 504th albanian-laundromat 631 264 444ms 3 Nov 2025 505th robin-scragg 627 103 9ms 21 Aug 2025 506th DialFrost 🇸🇬 627 304 152ms 13 Aug 2025 507th AlephSquirrel 625 40 48ms 1 Oct 2024 508th dokutan 624 127 2ms 10 Dec 2024 509th Jonatan6 🇩🇰 623 110 2ms 24 Oct 2024 509th solisolu 623 110 2ms 10 days ago 511th solisolu 621 104 11ms 20 days ago 512th codereport 🇨🇦 619 63 34ms 2 Oct 2024 513th BalaM314 619 104 9ms 4 Feb 2025 513th acollett89 619 104 9ms 15 Jul 2025 515th SirBogman 🇺🇸 618 93 408ms 23 Jul 2025 516th MarcMush 🇫🇷 617 91 737ms 8 Oct 2024 517th Ripick 617 135 335ms 23 Mar 2025 518th fourth-bit 615 105 16ms 1 Oct 2024 518th jared-hughes 615 105 17ms 3 Oct 2024 518th mattyhempstead 615 105 27ms 7 Oct 2024 521st olleicua 🇺🇸 612 78 36ms 18 Oct 2024 522nd evnu 612 147 78ms 12 Oct 2025 523rd davecame 609 106 16ms 1 Oct 2024 523rd starfihs 609 106 10ms 2 Oct 2024 523rd rschwa6308 🇺🇸 609 106 16ms 28 Oct 2024 First Prev 451–525 of 835 Next Last