Prime Numbers in C# 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 Gray Code Decoder Gray Code Encoder 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 Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering 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 ArkScript 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 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 ArkScript 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 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 Gray Code Decoder Gray Code Encoder 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 Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering 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 1st btnlq 1,000 53 464ms 10 Mar 2023 1st JayXon 🇺🇸 1,000 53 404ms 10 Mar 2023 1st Lydxn 🇨🇦 1,000 53 448ms 19 May 2023 1st AdrienHache 🇫🇷 1,000 53 391ms 20 Jun 2023 1st stefangimmillaro 1,000 53 418ms 15 Jul 2023 1st MeWhenI 🇻🇦 1,000 53 415ms 26 Jul 2023 1st namelessiw 1,000 53 446ms 12 Dec 2023 1st sean-niemann 🇺🇸 1,000 53 434ms 23 Dec 2024 1st Yax42 🇫🇷 1,000 53 436ms 9 Feb 2025 10th ScottHamper 981 54 363ms 21 Nov 2021 10th tomtheisen 🇺🇸 981 54 360ms 21 Nov 2021 12th fuzzylojik-golf 🇺🇸 841 63 386ms 31 Jul 2025 13th nwellnhof 🇩🇪 828 64 379ms 21 Dec 2021 13th WalrusesAreAwesome 828 64 395ms 11 Jan 2025 13th prplz 🇦🇺 828 64 455ms 23 Jan 2025 13th KasperKivimaeki 🇫🇮 828 64 415ms 22 Dec 2025 13th amazingalek 🇳🇴 828 64 414ms 29 Dec 2025 18th Attero 🇸🇪 815 65 485ms 21 Nov 2021 18th billings7 🇬🇧 815 65 387ms 21 Nov 2021 18th KatieLG 🇬🇧 815 65 450ms 21 Nov 2021 18th primo-ppcg 🇹🇭 815 65 382ms 21 Nov 2021 18th roavin 815 65 360ms 29 Jun 2022 18th annaproxy 815 65 409ms 19 May 2023 18th b-illy 🇬🇧 815 65 438ms 21 Jan 2025 18th albanian-laundromat 🇺🇸 815 65 420ms 24 Dec 2025 18th DialFrost 🇸🇬 815 65 418ms 31 Dec 2025 27th Shanethegamer 🇺🇸 803 66 371ms 28 Dec 2021 27th Yewzir 🇧🇪 803 66 378ms 8 May 2023 27th janbehrens 🇩🇪 803 66 360ms 27 Nov 2023 27th SirBogman 🇺🇸 803 66 357ms 3 Jan 2024 31st SmartK8 🇨🇿 791 67 372ms 10 Oct 2022 32nd KrausRaus 🇺🇸 779 68 388ms 26 Jun 2023 32nd matanberstadt 779 68 447ms 2 hours ago 34th Gaddy 🇫🇷 768 69 394ms 1 Jun 2022 34th postie77 768 69 381ms 18 Apr 2023 36th Irratix 🇳🇱 757 70 378ms 13 Dec 2021 36th Ripick 757 70 363ms 18 Jul 2022 36th CatsAreFluffy 757 70 375ms 28 Nov 2022 39th sultan 746 71 381ms 2 Apr 2024 40th tkr-sh 🇰🇵 736 72 375ms 4 May 2022 40th ChrisTheisen 736 72 387ms 19 Dec 2022 40th mathb0y512 736 72 368ms 8 Feb 2023 43rd LS2021 726 73 358ms 24 Nov 2023 43rd dokutan 726 73 417ms 14 Jul 2025 45th Meowsan91 🇨🇿 707 75 389ms 21 Nov 2021 46th pan4ever 697 76 381ms 21 Nov 2021 46th hamhub7 697 76 398ms 26 Aug 2022 46th Matgc04 697 76 353ms 23 Feb 2024 46th Squimbletin 697 76 416ms 22 Apr 2025 46th mwarvik 🇳🇴 697 76 411ms 5 Jan 2026 51st CarsonChr 🇺🇸 679 78 403ms 7 Apr 2024 51st kasarino 679 78 422ms 17 Mar 2026 51st scpchicken 🇵🇼 679 78 411ms 23 hours ago 54th hyvyys 671 79 366ms 21 Nov 2021 55th aliakseikalosha 663 80 471ms 21 Nov 2021 55th oren0 663 80 402ms 21 Nov 2021 55th adlerzei 663 80 442ms 5 May 2022 55th arctouch-sergeymetlov 663 80 386ms 21 Jun 2023 55th ElysiaVesper 663 80 358ms 19 Nov 2023 55th Re-Adventures 🇮🇳 663 80 437ms 15 Apr 2025 55th bpharaldsson 663 80 426ms 29 Jan 2026 62nd tdkkdt 🇷🇺 654 81 394ms 21 Nov 2021 62nd tomh1012 654 81 426ms 21 Nov 2021 62nd MLPdiscord 654 81 379ms 10 Jan 2022 62nd josephdwalker 654 81 389ms 14 Nov 2023 66th ILMTitan 646 82 377ms 21 Nov 2021 66th Romain-1 🇫🇷 646 82 414ms 1 Jun 2022 66th arctouch-cristiannevianna 646 82 427ms 23 May 2023 66th kkoenig 646 82 356ms 25 Dec 2023 66th FreyLuis 646 82 384ms 17 Jan 2024 66th michelebastione 🇮🇹 646 82 420ms 27 Aug 2025 72nd castur1 639 83 386ms 3 Feb 2022 73rd JDiLenarda 🇫🇷 631 84 388ms 21 Nov 2021 73rd najs91 631 84 393ms 21 Nov 2021 73rd bac0id 631 84 437ms 22 Sep 2023 73rd epic-programmer-guy 631 84 376ms 19 Dec 2023 73rd QzLP2P 631 84 385ms 29 Mar 2024 73rd malworthy 631 84 409ms 16 Aug 2024 73rd arcpolaris 631 84 457ms 27 Mar 2025 80th leth4 624 85 416ms 5 Jul 2023 1–80 of 152 Next Last