Evil Numbers in Ruby in bytes. 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Multitap Input 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus 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 Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 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 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 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 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Multitap Input 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus 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 Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 77th tatzyr 🇯🇵 711 38 34ms 8 Jan 2025 77th ejini6969 711 38 37ms 13 Jun 2025 77th Thinkr1 711 38 37ms 3 Feb 2026 84th n1LS 692 39 41ms 2 Oct 2019 84th ajc2 692 39 49ms 18 Oct 2019 84th AlephSquirrel 692 39 43ms 7 Mar 2023 84th vluyzvg 692 39 45ms 30 Mar 2023 84th LostSyntax21 🇬🇧 692 39 42ms 23 Aug 2024 84th snoozingnewt 🇨🇦 692 39 36ms 14 Sep 2025 90th aydamak 675 40 44ms 15 May 2024 91st robymus 659 41 37ms 17 Sep 2018 92nd biinari 643 42 57ms 27 Mar 2018 92nd adoxography 643 42 41ms 22 Jul 2018 92nd jstanley0 643 42 46ms 12 Dec 2020 92nd rucin93 🇵🇱 643 42 35ms 14 May 2025 92nd Babafaba 643 42 35ms 15 Oct 2025 97th ConorOBrien-Foxx 628 43 58ms 10 Apr 2018 97th nlc 628 43 39ms 11 Apr 2018 97th reireias 628 43 40ms 30 Jul 2019 97th handisb 628 43 45ms 14 Sep 2019 97th mogron 628 43 49ms 13 Dec 2019 97th dwayneparton 628 43 45ms 8 May 2020 97th Michaelncallahan 628 43 42ms 8 May 2020 97th aksyristos 628 43 56ms 31 Jan 2023 97th TheZwierzLF 🇵🇱 628 43 35ms 21 Dec 2025 106th snltd 614 44 37ms 14 Aug 2019 106th sapphyrus 614 44 38ms 18 Feb 2020 106th meenie 614 44 41ms 1 Jan 2021 106th Pluviolithic 614 44 38ms 17 Oct 2023 110th tom-lord 600 45 45ms 8 Nov 2017 110th clupasq 600 45 60ms 3 Feb 2018 110th biji1 600 45 51ms 26 Apr 2018 110th atsushiootani 600 45 44ms 7 Aug 2018 110th 0xddom 600 45 40ms 18 Dec 2019 110th tadd 600 45 38ms 16 Apr 2020 110th Secozzi 600 45 47ms 21 Oct 2020 110th Luj8n 600 45 41ms 12 Nov 2021 110th badboj40 600 45 46ms 14 Feb 2023 119th rlue 587 46 44ms 8 Nov 2017 119th basuneko 587 46 53ms 8 Nov 2017 119th JeremyC-za 587 46 54ms 10 Nov 2017 119th Yytsi 587 46 50ms 14 Mar 2019 119th TFeld00 🇩🇰 587 46 43ms 6 Jun 2019 119th th0rex 587 46 37ms 10 Jun 2019 119th Mir0ff944 587 46 45ms 23 Oct 2019 119th fynnkroeger 587 46 44ms 17 Oct 2022 127th kobaltz 574 47 41ms 8 Nov 2017 127th stevehodges 574 47 36ms 8 Nov 2017 127th iamsolarpowered 574 47 41ms 15 Dec 2017 127th babcockd 574 47 55ms 19 Dec 2017 127th Mikaeel66 574 47 46ms 10 Nov 2019 127th branch14 574 47 60ms 3 Aug 2020 127th maths22 🇺🇸 574 47 39ms 9 Dec 2020 127th HallMatthew314 574 47 41ms 10 Dec 2021 127th Edjyzod 574 47 59ms 3 Oct 2022 136th jacobsmith 563 48 55ms 15 Feb 2018 136th yokasuretsu 563 48 46ms 18 Apr 2018 136th Marcel-Brouette 563 48 37ms 26 Aug 2018 136th jamespeilunli 563 48 44ms 1 May 2022 140th alexkurowski 551 49 52ms 8 Nov 2017 140th Boostik 551 49 57ms 7 Jan 2018 140th chris-arsenault 551 49 53ms 2 Feb 2018 140th caerbannogwhite 551 49 59ms 13 Apr 2018 140th jetpks 551 49 44ms 27 Jun 2019 140th boxjelly 551 49 42ms 12 Feb 2021 140th RustemB 🇷🇺 551 49 39ms 4 May 2021 140th schachmattmatt 551 49 39ms 11 Aug 2021 148th sstadick 540 50 35ms 24 Jan 2018 148th sacthedev 540 50 36ms 3 Apr 2018 148th tsundokul 540 50 38ms 6 Nov 2018 148th atayarani 540 50 40ms 17 Jan 2019 148th Noxilex 540 50 41ms 20 Mar 2019 148th op-ecoprintq 540 50 45ms 31 Jul 2020 148th eggplants 🇯🇵 540 50 54ms 26 Nov 2020 155th san-nat 529 51 40ms 12 Dec 2020 155th frnco 529 51 39ms 2 Jun 2022 155th Krtecik 529 51 45ms 9 Feb 2024 155th Ralac07 🇦🇺 529 51 39ms 4 Jul 2024 159th flavono123 519 52 46ms 15 Jul 2019 159th pandapawskat 519 52 50ms 7 Oct 2021 First Prev 81–160 of 187 Next Last