Card Number Validation in Python 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 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 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 1st bizy-coder 1,000 67 20ms 1 Oct 2024 1st pardouin 🇫🇷 1,000 67 20ms 1 Oct 2024 1st btnlq 1,000 67 20ms 1 Oct 2024 1st Seek64 🇩🇪 1,000 67 20ms 1 Oct 2024 1st m-tkach 🇺🇦 1,000 67 21ms 1 Oct 2024 1st Rubiksmath 1,000 67 20ms 7 Oct 2024 1st JayXon 🇺🇸 1,000 67 20ms 13 Oct 2024 1st khvdm 1,000 67 20ms 28 Feb 2025 9th hallvabo 🇳🇴 985 68 20ms 4 Jun 2025 10th kg583 🇺🇸 957 70 16ms 10 Oct 2024 10th sean-niemann 🇺🇸 957 70 20ms 8 Jan 2025 12th duckyluuk 🇳🇱 931 72 17ms 4 Oct 2024 12th ndren 931 72 18ms 14 Feb 2025 12th CornerMercury 🇬🇧 931 72 18ms 10 days ago 15th moustave 918 73 20ms 5 Nov 2024 15th emgordon154 918 73 16ms 18 Nov 2024 17th albanian-laundromat 905 74 20ms 3 Nov 2025 18th anter69 🇭🇺 893 75 16ms 11 Oct 2024 19th lifthrasiir 🇰🇷 882 76 9ms 16 Nov 2024 20th jatloe 870 77 10ms 1 Oct 2024 21st qpwoeirut 859 78 10ms 1 Oct 2025 22nd Babafaba 827 81 17ms 23 days ago 23rd SB-945 817 82 18ms 1 Oct 2024 23rd HumanoidCPU 817 82 61ms 7 Mar 2025 23rd fkantelberg 817 82 10ms 11 Jul 2025 23rd BrunoVisnadi 🇧🇷 817 82 10ms 21 Sep 2025 27th Bmrl7 807 83 10ms 3 Oct 2024 27th snoozingnewt 🇨🇦 807 83 11ms 13 days ago 29th AlephSquirrel 798 84 18ms 1 Oct 2024 29th kops-cg 798 84 21ms 22 Feb 2025 29th xnor-gate 798 84 19ms 23 Feb 2025 29th plcc0 798 84 17ms 6 Apr 2025 29th KatieLG 🇬🇧 798 84 17ms 25 May 2025 34th inventshah 788 85 20ms 4 Oct 2024 34th Artemis21 🇬🇧 788 85 10ms 10 Jan 2025 34th keelimeguy 🇺🇸 788 85 16ms 14 Jun 2025 37th wh3n3v3r 🇨🇿 761 88 10ms 18 Nov 2024 38th nwellnhof 🇩🇪 744 90 19ms 1 Oct 2024 38th ovs-code 🇩🇪 744 90 16ms 3 Oct 2024 38th ryyyn 🇺🇸 744 90 21ms 26 Jul 2025 38th luuumine 🇫🇷 744 90 18ms 8 Oct 2025 38th JOrE20 🇺🇸 744 90 22ms 2 days ago 43rd 5cw 🇺🇸 736 91 16ms 1 Oct 2024 43rd stefangimmillaro 736 91 17ms 13 Oct 2024 43rd dokutan 736 91 10ms 19 Oct 2024 43rd GrayJoKing 🇦🇺 736 91 19ms 2 Jul 2025 47th Shanethegamer 🇺🇸 728 92 16ms 3 Oct 2024 47th error256 728 92 21ms 7 Oct 2024 47th thatbirdguythatuknownot 728 92 16ms 14 Oct 2024 50th Bulmenisaurus 720 93 16ms 6 Oct 2024 50th lynn 720 93 16ms 8 Jan 2025 50th RaBa21 🇭🇺 720 93 16ms 19 Jul 2025 50th KasperKivimaeki 🇫🇮 720 93 17ms 3 days ago 54th DialFrost 🇸🇬 713 94 16ms 1 Oct 2024 55th MeWhenI 🇻🇦 698 96 16ms 30 Jul 2025 56th GolfingSuccess 🇬🇷 684 98 15ms 5 Oct 2024 56th firegene 🇮🇪 684 98 24ms 21 Oct 2024 56th JunkIce 684 98 10ms 3 Dec 2024 59th SirBogman 🇺🇸 677 99 16ms 8 Oct 2024 60th FlorianCassayre 🇫🇷 670 100 16ms 1 Oct 2024 60th bzijlema 🇳🇱 670 100 23ms 10 Oct 2024 60th bricknellj 670 100 26ms 4 Mar 2025 63rd btjones0 663 101 18ms 2 Dec 2024 64th annaproxy 657 102 17ms 1 Oct 2024 64th xyangst 657 102 10ms 1 Oct 2024 66th robin-scragg 650 103 9ms 21 Aug 2025 67th solisolu 644 104 11ms 18 days ago 68th fourth-bit 638 105 16ms 1 Oct 2024 68th jared-hughes 638 105 17ms 3 Oct 2024 68th mattyhempstead 638 105 27ms 7 Oct 2024 71st davecame 632 106 16ms 1 Oct 2024 71st starfihs 632 106 10ms 2 Oct 2024 71st rschwa6308 🇺🇸 632 106 16ms 28 Oct 2024 71st snydej 632 106 17ms 21 Nov 2024 71st andrewjc2000 632 106 15ms 17 Jul 2025 1–75 of 205 Next Last