Prime Numbers in Ruby in chars. 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 Chars Time Submitted 64th AlephSquirrel 818 33 38ms 14 Apr 2023 64th FortuiteMan 🇫🇷 818 33 45ms 11 Sep 2023 64th aaronze 🇦🇺 818 33 45ms 21 Sep 2023 64th FlyingPenguin223 818 33 37ms 16 Nov 2023 64th ngthanhtrung23 818 33 50ms 15 Mar 2024 64th LostSyntax21 🇬🇧 818 33 41ms 24 Jul 2025 64th Matter1024 🇮🇳 818 33 40ms 15 Nov 2025 64th Thinkr1 818 33 42ms 2 Feb 2026 89th ConorOBrien-Foxx 794 34 43ms 2 Jul 2018 89th acornellier 794 34 64ms 8 Dec 2018 89th Yytsi 794 34 46ms 14 Mar 2019 89th Marin-Kitagawa 794 34 51ms 18 Jul 2021 89th pandapawskat 794 34 48ms 7 Oct 2021 89th DaCuteRaccoon 794 34 54ms 16 Apr 2022 89th ls-samer-abuthaher 794 34 54ms 2 Dec 2022 89th annaproxy 794 34 47ms 15 Sep 2023 89th Babafaba 794 34 36ms 15 Oct 2025 98th Haksell 🇦🇶 771 35 54ms 6 Apr 2020 98th daninnm 771 35 59ms 23 Jul 2021 98th shellbertt 🇨🇦 771 35 42ms 8 Sep 2021 98th dokutan 771 35 46ms 30 Apr 2024 98th TheZwierzLF 🇵🇱 771 35 50ms 5 Jan 2026 103rd clupasq 750 36 46ms 3 Feb 2018 103rd tadd 750 36 49ms 16 Apr 2020 103rd yzhs 🇩🇪 750 36 47ms 26 Jul 2021 106th j55d 730 37 45ms 4 Dec 2017 106th Secozzi 730 37 45ms 28 Nov 2019 106th kinoute 🇫🇷 730 37 46ms 10 Sep 2021 106th KrausRaus 🇺🇸 730 37 38ms 31 Dec 2021 110th mgergi 711 38 51ms 10 Oct 2018 110th SamirHodzic 711 38 48ms 11 Oct 2018 110th CaAlden 711 38 49ms 9 May 2019 110th reireias 711 38 50ms 30 Jul 2019 110th Mir0ff944 711 38 53ms 4 Apr 2020 110th Gradizer 711 38 57ms 13 Mar 2021 110th typewriter 711 38 56ms 1 Jun 2021 110th JRaspass 🇬🇧 711 38 47ms 21 Apr 2022 118th greghull 692 39 54ms 8 Nov 2017 118th robymus 692 39 51ms 18 Sep 2018 118th purp 692 39 47ms 13 Aug 2022 118th aydamak 692 39 42ms 15 May 2024 122nd ndren 675 40 58ms 2 Aug 2023 122nd BREMAUCY 🇫🇷 675 40 50ms 18 Mar 2024 122nd Andriamanitra 🇫🇮 675 40 36ms 25 Feb 2025 125th Boostik 659 41 50ms 8 Jan 2018 125th ajc2 659 41 45ms 1 May 2018 125th segiddins 659 41 44ms 24 Aug 2018 125th giruzou 659 41 48ms 24 Mar 2019 125th 0xddom 659 41 54ms 18 Dec 2019 130th nlc 643 42 46ms 18 Dec 2017 130th adoxography 643 42 46ms 10 Oct 2019 132nd stevehodges 628 43 55ms 8 Nov 2017 132nd graft 628 43 46ms 10 Mar 2018 132nd SephQ 628 43 47ms 7 Feb 2021 135th ndimov 614 44 55ms 13 Oct 2017 135th mogron 614 44 45ms 13 Dec 2019 135th sapphyrus 614 44 42ms 18 Feb 2020 135th ninjawarrior1337 614 44 52ms 1 Dec 2021 135th HallMatthew314 614 44 40ms 5 Dec 2021 135th mikiymk 614 44 49ms 21 Sep 2023 141st somebody1234 600 45 38ms 20 Jan 2020 141st BrenSchaap 600 45 54ms 13 Nov 2021 143rd bbakersmith 587 46 42ms 30 Jul 2021 143rd gfund 587 46 65ms 5 Oct 2022 145th Anonymousellama21 574 47 47ms 18 Feb 2022 146th dwayneparton 563 48 48ms 7 May 2020 146th stellartux 563 48 36ms 24 Dec 2023 148th iamsolarpowered 551 49 45ms 15 Dec 2017 148th th1rt3en 551 49 42ms 13 May 2018 148th zstearman3 551 49 58ms 12 Jul 2018 148th atayarani 551 49 51ms 18 Jan 2019 148th HumanoidCPU 551 49 52ms 3 Jul 2024 148th Florian-Mt 551 49 39ms 14 Jul 2024 154th domgetter 529 51 67ms 10 Jun 2020 154th boxjelly 529 51 38ms 11 Feb 2021 156th babcockd 519 52 38ms 19 Dec 2017 156th michaelrychly 519 52 60ms 5 Jun 2019 156th Ralac07 🇦🇺 519 52 37ms 4 Jul 2024 159th FnControlOption 509 53 50ms 21 Aug 2022 160th sacthedev 500 54 44ms 3 Apr 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