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 aksyristos 433 184 16ms 15 Nov 2024 752nd KatieLG 🇬🇧 431 108 7ms 13 Oct 2024 753rd snoozingnewt 🇺🇸 430 111 36ms 14 days ago 754th estomagordo 🇳🇱 428 186 10ms 15 Jul 2025 755th snoozingnewt 🇺🇸 426 268 28ms 14 days ago 756th dokutan 425 132 307ms 3 Oct 2024 757th MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 758th Arkadios200 415 196 95ms 27 days ago 759th dieggsy 406 247 21ms 10 Oct 2024 760th snoozingnewt 🇺🇸 406 313 45ms 14 days ago 761st Mabeloid 🇳🇴 405 159 13ms 12 Oct 2024 762nd snoozingnewt 🇺🇸 404 223 83ms 14 days ago 763rd Ralac07 🇦🇺 397 162 11ms 3 Oct 2024 764th ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 765th fischfood 384 176 4ms 22 Oct 2024 766th c0d3-4-F00d 🇩🇪 381 184 2ms 9 Jan 2025 767th snoozingnewt 🇺🇸 379 286 41ms 14 days ago 768th snoozingnewt 🇺🇸 376 267 13ms 14 days ago 769th RobGLambert 370 232 975ms 8 Jun 2025 770th RedzGoose 🇦🇺 369 187 104ms 2 Oct 2024 771st P1nk-P0nk 369 215 3ms 18 Oct 2024 772nd gautambp 365 218 10ms 24 Jun 2025 773rd sciencejiho 356 197 2ms 11 Feb 2025 774th The-Wolfson 354 230 102ms 16 Dec 2024 775th Zhenyu-Bo 349 228 14ms 30 Jul 2025 776th EthanJantz 346 230 10ms 5 Sep 2025 777th RobGLambert 341 273 200ms 8 Jun 2025 778th Ernest1338 339 275 275ms 26 Oct 2024 779th noahhorlacher 337 191 9ms 7 Dec 2024 780th RobertBurs 336 237 10ms 22 Sep 2025 781st TJK-S 330 241 9ms 23 days ago 782nd te-chnical 309 258 193ms 4 May 2025 783rd snoozingnewt 🇺🇸 303 200 3ms 14 days ago 784th KatieLG 🇬🇧 296 290 1,770ms 1 Oct 2025 785th KatieLG 🇬🇧 291 241 2ms 1 Oct 2025 786th ReterikHub 277 310 204ms 17 Jan 2025 787th Mikey-Beep 🇬🇧 273 349 25ms 12 Aug 2025 788th MeWhenI 🇻🇦 271 407 132ms 6 Oct 2024 789th arebbsba 269 296 12ms 9 Jan 2025 790th Msleizak 🇫🇷 206 226 269ms 19 May 2025 791st AidanWalter 147 540 9ms 1 Jan 2025 792nd vkptimon 120 776 307ms 9 Jul 2025 793rd bignamehyp 119 667 9ms 14 Nov 2024 794th dokutan 60 2,475 124ms 18 Aug 2025 795th iczelia 🇩🇪 52 2,045 4ms 14 Oct 2025 796th lyphyser 0 15 80ms 25 May 2025 797th 2bular 0 16 76ms 22 Mar 2025 798th darrenks 0 17 78ms 22 Mar 2025 799th Natanaelel 🇸🇪 0 18 74ms 23 Mar 2025 800th plcc0 0 21 99ms 4 Apr 2025 801st kg583 🇺🇸 0 25 266ms 8 Feb 2025 801st namelessiw 0 25 411ms 12 Oct 2025 803rd lyxal 🇦🇺 0 27 494ms 17 May 2025 804th themoonisacheese 0 35 484ms 13 Jun 2025 805th ovs-code 🇩🇪 0 54 4ms 9 Jul 2025 806th GrayJoKing 🇦🇺 0 55 3ms 13 Jul 2025 807th ovs-code 🇩🇪 0 58 3ms 13 Jul 2025 808th AlephSquirrel 0 63 3ms 15 Jun 2025 809th DialFrost 🇸🇬 0 67 81ms 13 Feb 2025 810th chunes3 🇺🇸 0 69 42ms 13 Feb 2025 811th maweowo 🇩🇪 0 70 4ms 2 Oct 2025 812th evnu 0 73 5ms 12 Oct 2025 813th ovs-code 🇩🇪 0 76 15ms 13 Jun 2025 814th sean-niemann 🇺🇸 0 80 69ms 29 Apr 2025 815th albanian-laundromat 0 123 2ms 4 Jun 2025 816th edsrzf 🇳🇿 0 142 216ms 24 Jul 2025 817th MatthewF19 0 192 119ms 17 May 2025 818th dokutan 0 219 65ms 28 Jun 2025 First Prev 751–818 of 818