Prime 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 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel 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 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 62nd aaronze 🇦🇺 939 33 36ms 21 Sep 2023 62nd FlyingPenguin223 939 33 33ms 16 Nov 2023 62nd ngthanhtrung23 939 33 43ms 15 Mar 2024 62nd LostSyntax21 🇬🇧 939 33 38ms 24 Jul 2025 62nd Matter1024 🇮🇳 939 33 48ms 15 Nov 2025 86th ConorOBrien-Foxx 912 34 40ms 2 Jul 2018 86th acornellier 912 34 37ms 8 Dec 2018 86th Yytsi 912 34 37ms 14 Mar 2019 86th Marin-Kitagawa 912 34 46ms 18 Jul 2021 86th pandapawskat 912 34 40ms 7 Oct 2021 86th DaCuteRaccoon 912 34 39ms 16 Apr 2022 86th ls-samer-abuthaher 912 34 45ms 2 Dec 2022 86th annaproxy 912 34 36ms 15 Sep 2023 86th Babafaba 912 34 44ms 15 Oct 2025 95th Haksell 🇦🇶 886 35 36ms 6 Apr 2020 95th daninnm 886 35 40ms 23 Jul 2021 95th shellbertt 🇨🇦 886 35 38ms 8 Sep 2021 95th dokutan 886 35 39ms 30 Apr 2024 95th D-MOVE 🇵🇭 886 35 58ms 9 days ago 100th clupasq 861 36 39ms 3 Feb 2018 100th tadd 861 36 36ms 16 Apr 2020 100th yzhs 🇩🇪 861 36 33ms 26 Jul 2021 103rd j55d 838 37 41ms 4 Dec 2017 103rd Secozzi 838 37 39ms 28 Nov 2019 103rd kinoute 🇫🇷 838 37 43ms 10 Sep 2021 103rd KrausRaus 🇺🇸 838 37 38ms 31 Dec 2021 107th mgergi 816 38 42ms 10 Oct 2018 107th SamirHodzic 816 38 39ms 11 Oct 2018 107th CaAlden 816 38 41ms 9 May 2019 107th reireias 816 38 43ms 30 Jul 2019 107th Mir0ff944 816 38 40ms 4 Apr 2020 107th Gradizer 816 38 42ms 13 Mar 2021 107th typewriter 816 38 37ms 1 Jun 2021 107th JRaspass 🇬🇧 816 38 62ms 21 Apr 2022 115th greghull 795 39 40ms 8 Nov 2017 115th robymus 795 39 39ms 18 Sep 2018 115th purp 795 39 40ms 13 Aug 2022 115th aydamak 795 39 32ms 15 May 2024 119th ndren 775 40 43ms 2 Aug 2023 119th BREMAUCY 🇫🇷 775 40 36ms 18 Mar 2024 119th Andriamanitra 🇫🇮 775 40 50ms 25 Feb 2025 122nd Boostik 756 41 40ms 8 Jan 2018 122nd ajc2 756 41 37ms 1 May 2018 122nd segiddins 756 41 39ms 24 Aug 2018 122nd giruzou 756 41 39ms 24 Mar 2019 122nd 0xddom 756 41 43ms 18 Dec 2019 127th nlc 738 42 42ms 18 Dec 2017 127th adoxography 738 42 37ms 10 Oct 2019 129th stevehodges 721 43 36ms 8 Nov 2017 129th graft 721 43 35ms 10 Mar 2018 129th SephQ 721 43 38ms 7 Feb 2021 132nd ndimov 705 44 42ms 13 Oct 2017 132nd mogron 705 44 42ms 13 Dec 2019 132nd sapphyrus 705 44 40ms 18 Feb 2020 132nd ninjawarrior1337 705 44 42ms 1 Dec 2021 132nd HallMatthew314 705 44 42ms 5 Dec 2021 132nd mikiymk 705 44 43ms 21 Sep 2023 138th somebody1234 689 45 33ms 20 Jan 2020 138th BrenSchaap 689 45 38ms 13 Nov 2021 138th TheZwierzLF 🇵🇱 689 45 33ms 2 days ago 141st bbakersmith 674 46 34ms 30 Jul 2021 141st gfund 674 46 40ms 5 Oct 2022 143rd Anonymousellama21 660 47 32ms 18 Feb 2022 144th dwayneparton 646 48 38ms 7 May 2020 144th stellartux 646 48 33ms 24 Dec 2023 146th iamsolarpowered 633 49 37ms 15 Dec 2017 146th th1rt3en 633 49 38ms 13 May 2018 146th zstearman3 633 49 38ms 12 Jul 2018 146th atayarani 633 49 38ms 18 Jan 2019 146th HumanoidCPU 633 49 37ms 3 Jul 2024 146th Florian-Mt 633 49 52ms 14 Jul 2024 152nd domgetter 608 51 39ms 10 Jun 2020 152nd boxjelly 608 51 33ms 11 Feb 2021 154th babcockd 596 52 34ms 19 Dec 2017 154th michaelrychly 596 52 44ms 5 Jun 2019 154th Ralac07 🇦🇺 596 52 54ms 4 Jul 2024 157th FnControlOption 585 53 40ms 21 Aug 2022 158th sacthedev 574 54 38ms 3 Apr 2018 158th omurakazuaki 🇯🇵 574 54 35ms 2 May 2019 158th gutierrezm00 574 54 37ms 7 May 2020 First Prev 81–160 of 183 Next Last