Card Number Validation in all languages in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 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 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 Tower of Hanoi Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 Erlang 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 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 Erlang 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 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 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 Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 751st KatieLG 🇬🇧 431 108 7ms 13 Oct 2024 752nd snoozingnewt 🇺🇸 430 111 36ms 11 days ago 753rd estomagordo 🇳🇱 428 186 10ms 15 Jul 2025 754th snoozingnewt 🇺🇸 426 268 28ms 11 days ago 755th dokutan 425 132 307ms 3 Oct 2024 756th MeWhenI 🇻🇦 424 143 7ms 2 Oct 2024 757th Arkadios200 415 196 95ms 24 days ago 758th dieggsy 406 247 21ms 10 Oct 2024 759th snoozingnewt 🇺🇸 406 313 45ms 11 days ago 760th Mabeloid 🇳🇴 405 159 13ms 12 Oct 2024 761st snoozingnewt 🇺🇸 404 223 391ms 11 days ago 762nd Ralac07 🇦🇺 397 162 11ms 3 Oct 2024 763rd ehulinsky 🇺🇸 384 158 6ms 2 Apr 2025 764th fischfood 384 176 4ms 22 Oct 2024 765th c0d3-4-F00d 🇩🇪 381 184 2ms 9 Jan 2025 766th snoozingnewt 🇺🇸 379 286 41ms 11 days ago 767th snoozingnewt 🇺🇸 376 267 13ms 11 days ago 768th RobGLambert 370 232 975ms 8 Jun 2025 769th RedzGoose 🇦🇺 369 187 104ms 2 Oct 2024 770th P1nk-P0nk 369 215 3ms 18 Oct 2024 771st gautambp 365 218 11ms 24 Jun 2025 772nd sciencejiho 356 197 2ms 11 Feb 2025 773rd The-Wolfson 354 230 102ms 16 Dec 2024 774th Zhenyu-Bo 349 228 11ms 30 Jul 2025 775th EthanJantz 346 230 11ms 5 Sep 2025 776th RobGLambert 341 273 201ms 8 Jun 2025 777th Ernest1338 339 275 275ms 26 Oct 2024 778th noahhorlacher 337 191 9ms 7 Dec 2024 779th RobertBurs 336 237 10ms 22 Sep 2025 780th TJK-S 330 241 10ms 20 days ago 781st te-chnical 309 258 202ms 4 May 2025 782nd snoozingnewt 🇺🇸 303 200 4ms 11 days ago 783rd KatieLG 🇬🇧 296 290 1,770ms 1 Oct 2025 784th KatieLG 🇬🇧 291 241 2ms 1 Oct 2025 785th ReterikHub 277 310 204ms 17 Jan 2025 786th Mikey-Beep 🇬🇧 273 349 25ms 12 Aug 2025 787th MeWhenI 🇻🇦 271 407 132ms 6 Oct 2024 788th arebbsba 269 296 11ms 9 Jan 2025 789th Msleizak 🇫🇷 206 226 269ms 19 May 2025 790th AidanWalter 147 540 11ms 1 Jan 2025 791st vkptimon 120 776 307ms 9 Jul 2025 792nd bignamehyp 119 667 12ms 14 Nov 2024 793rd dokutan 60 2,475 124ms 18 Aug 2025 794th iczelia 🇩🇪 52 2,045 4ms 14 Oct 2025 795th lyphyser 0 15 80ms 25 May 2025 796th 2bular 0 16 76ms 22 Mar 2025 797th darrenks 0 17 78ms 22 Mar 2025 798th Natanaelel 🇸🇪 0 18 74ms 23 Mar 2025 799th plcc0 0 21 99ms 4 Apr 2025 800th kg583 🇺🇸 0 25 266ms 8 Feb 2025 800th namelessiw 0 25 411ms 12 Oct 2025 802nd lyxal 🇦🇺 0 27 494ms 17 May 2025 803rd themoonisacheese 0 35 484ms 13 Jun 2025 804th ovs-code 🇩🇪 0 54 4ms 9 Jul 2025 805th GrayJoKing 🇦🇺 0 55 3ms 13 Jul 2025 806th ovs-code 🇩🇪 0 58 3ms 13 Jul 2025 807th AlephSquirrel 0 63 3ms 15 Jun 2025 808th DialFrost 🇸🇬 0 67 78ms 13 Feb 2025 809th chunes3 🇺🇸 0 69 41ms 13 Feb 2025 810th maweowo 🇩🇪 0 70 4ms 2 Oct 2025 811th evnu 0 73 5ms 12 Oct 2025 812th ovs-code 🇩🇪 0 76 15ms 13 Jun 2025 813th sean-niemann 🇺🇸 0 80 69ms 29 Apr 2025 814th albanian-laundromat 0 123 2ms 4 Jun 2025 815th edsrzf 🇳🇿 0 142 216ms 24 Jul 2025 816th MatthewF19 0 192 119ms 17 May 2025 817th dokutan 0 219 65ms 28 Jun 2025 First Prev 751–817 of 817