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 Calendar Connect Four 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 Calendar Connect Four 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 snoozingnewt 🇺🇸 401 223 295ms 7 hours ago 752nd Ralac07 🇦🇺 397 162 10ms 3 Oct 2024 753rd fischfood 384 176 4ms 22 Oct 2024 754th ehulinsky 🇺🇸 381 158 6ms 2 Apr 2025 755th c0d3-4-F00d 🇩🇪 381 184 2ms 9 Jan 2025 756th snoozingnewt 🇺🇸 379 286 41ms 7 hours ago 757th snoozingnewt 🇺🇸 376 267 14ms 7 hours ago 758th RobGLambert 370 232 1,004ms 8 Jun 2025 759th RedzGoose 🇦🇺 369 187 116ms 2 Oct 2024 760th P1nk-P0nk 368 215 3ms 18 Oct 2024 761st gautambp 365 218 11ms 24 Jun 2025 762nd sciencejiho 356 197 2ms 11 Feb 2025 763rd The-Wolfson 354 230 114ms 16 Dec 2024 764th Zhenyu-Bo 349 228 11ms 30 Jul 2025 765th EthanJantz 346 230 11ms 5 Sep 2025 766th RobGLambert 341 273 192ms 8 Jun 2025 767th Ernest1338 339 275 266ms 26 Oct 2024 768th noahhorlacher 337 191 10ms 7 Dec 2024 769th RobertBurs 336 237 10ms 22 Sep 2025 770th TJK-S 330 241 10ms 8 days ago 771st te-chnical 309 258 202ms 4 May 2025 772nd snoozingnewt 🇺🇸 301 200 4ms 7 hours ago 773rd KatieLG 🇬🇧 296 290 2,227ms 1 Oct 2025 774th KatieLG 🇬🇧 291 241 2ms 1 Oct 2025 775th ReterikHub 277 310 214ms 17 Jan 2025 776th Mikey-Beep 🇬🇧 273 349 25ms 12 Aug 2025 777th MeWhenI 🇻🇦 271 407 132ms 6 Oct 2024 778th arebbsba 269 296 11ms 9 Jan 2025 779th Msleizak 🇫🇷 206 226 269ms 19 May 2025 780th AidanWalter 147 540 11ms 1 Jan 2025 781st vkptimon 120 776 322ms 9 Jul 2025 782nd bignamehyp 119 667 12ms 14 Nov 2024 783rd dokutan 60 2,475 158ms 18 Aug 2025 784th iczelia 🇩🇪 52 2,045 4ms 19 days ago 785th lyphyser 0 15 80ms 25 May 2025 786th 2bular 0 16 76ms 22 Mar 2025 787th darrenks 0 17 78ms 22 Mar 2025 788th Natanaelel 🇸🇪 0 18 74ms 23 Mar 2025 789th plcc0 0 21 99ms 4 Apr 2025 790th kg583 🇺🇸 0 25 267ms 8 Feb 2025 790th namelessiw 0 25 411ms 21 days ago 792nd lyxal 🇦🇺 0 27 1,009ms 17 May 2025 793rd themoonisacheese 0 35 709ms 13 Jun 2025 794th ovs-code 🇩🇪 0 54 5ms 9 Jul 2025 795th GrayJoKing 🇦🇺 0 55 3ms 13 Jul 2025 796th ovs-code 🇩🇪 0 58 3ms 13 Jul 2025 797th AlephSquirrel 0 63 4ms 15 Jun 2025 798th DialFrost 🇸🇬 0 67 77ms 13 Feb 2025 799th chunes3 🇺🇸 0 69 38ms 13 Feb 2025 800th maweowo 0 70 5ms 2 Oct 2025 801st evnu 0 73 5ms 21 days ago 802nd ovs-code 🇩🇪 0 76 15ms 13 Jun 2025 803rd sean-niemann 🇺🇸 0 80 69ms 29 Apr 2025 804th albanian-laundromat 0 123 2ms 4 Jun 2025 805th edsrzf 🇳🇿 0 142 216ms 24 Jul 2025 806th MatthewF19 0 192 119ms 17 May 2025 807th dokutan 0 219 65ms 28 Jun 2025 First Prev 751–807 of 807