Happy Numbers in Crystal 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 brainfuck 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 Intersection Inventory Sequence ISBN Jacobi Symbol Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Maze Medal Tally Morse Decoder Morse Encoder Musical Chords Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers Pangram Grep Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic Rule 110 Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars Opening Crawl Sudoku Sudoku v2 Ten-pin Bowling Time Distance Tongue-twisters United States Vampire Numbers Van Eck Sequence Zodiac Signs γ λ π τ φ √2 𝑒 All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Clojure COBOL Coconut Crystal D Dart Elixir F# Factor Forth Fortran Go GolfScript Haskell Hexagony J Janet Java JavaScript Julia K Lisp Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust sed SQL Swift Tcl TeX V VimL Wren Zig Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Clojure COBOL Coconut Crystal D Dart Elixir F# Factor Forth Fortran Go GolfScript Haskell Hexagony J Janet Java JavaScript Julia K Lisp Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust sed SQL Swift Tcl TeX V VimL Wren Zig 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 brainfuck 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 Intersection Inventory Sequence ISBN Jacobi Symbol Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Maze Medal Tally Morse Decoder Morse Encoder Musical Chords Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers Pangram Grep Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic Rule 110 Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars Opening Crawl Sudoku Sudoku v2 Ten-pin Bowling Time Distance Tongue-twisters United States Vampire Numbers Van Eck Sequence Zodiac Signs γ λ π τ φ √2 𝑒 # Golfer Lang Points Bytes Time 1st GrayJoKing 🇦🇺 Crystal 1,000 53 13 Sep 2021 1st Lydxn 🇨🇦 Crystal 1,000 53 13 Sep 2021 1st JayXon 🇺🇸 Crystal 1,000 53 20 Sep 2021 1st primo-ppcg 🇹🇭 Crystal 1,000 53 22 Sep 2021 1st sisyphus-ppcg 🇦🇺 Crystal 1,000 53 3 Feb 2022 1st Steffan153 🇫🇮 Crystal 1,000 53 27 Mar 2023 1st stefangimmillaro Crystal 1,000 53 14 Apr 2023 8th Shanethegamer 🇺🇸 Crystal 981 54 13 Sep 2021 9th MeWhenI 🇻🇦 Crystal 946 56 13 Nov 2022 10th anter69 🇭🇺 Crystal 930 57 24 Feb 2023 11th emgordon154 Crystal 914 58 22 Dec 2021 12th lynn Crystal 898 59 25 May 2022 13th janlelis Crystal 883 60 21 Apr 2021 14th Natanaelel 🇸🇪 Crystal 828 64 19 Sep 2021 15th yzhs 🇩🇪 Crystal 815 65 3 Aug 2021 16th Irratix 🇳🇱 Crystal 803 66 25 Mar 2021 16th KatieLG 🇬🇧 Crystal 803 66 3 May 2021 18th Yewzir 🇧🇪 Crystal 779 68 7 Feb 2024 19th dokutan Crystal 746 71 5 days ago 20th konovod Crystal 736 72 25 Mar 2021 21st JRaspass 🇬🇧 Crystal 469 113 23 Mar 2021 21st retrohun Crystal 469 113 27 Dec 2022 23rd msbranicky Crystal 381 139 8 Sep 2023 24th mokymok 🇺🇸 Crystal 368 144 8 Nov 2021 24th KatieLG-Transpiler 🇬🇧 Crystal 368 144 3 Jul 2022 26th arcage 🇯🇵 Crystal 356 149 30 Apr 2021 27th juhanilep Crystal 233 227 11 Apr 2021 1–27 of 27