The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Farey Sequence in all languages 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 401st Shanethegamer 🇺🇸 851 80 104ms 1 Dec 2023 402nd ovs-code 🇩🇪 850 133 462ms 29 Mar 2025 403rd pardouin 🇫🇷 849 76 2ms 20 Aug 2024 404th DialFrost 🇸🇬 845 64 128ms 3 Aug 2024 404th pardouin 🇫🇷 845 64 128ms 30 Aug 2024 406th MeWhenI 🇻🇦 844 85 27ms 1 Dec 2023 406th edsrzf 🇳🇿 844 85 27ms 25 Apr 2025 408th blaztoma 🇱🇹 843 53 2ms 26 days ago 409th emgordon154 843 96 479ms 28 May 2025 410th DialFrost 🇸🇬 843 174 1,689ms 15 Sep 2025 411th MeWhenI 🇻🇦 842 66 1,018ms 1 Dec 2023 411th ovs-code 🇩🇪 842 66 949ms 4 Dec 2023 411th emgordon154 842 66 921ms 9 Apr 2025 414th DialFrost 🇸🇬 842 73 82ms 16 Dec 2023 415th stefangimmillaro 842 90 447ms 6 Oct 2025 416th Yewzir 🇧🇪 841 87 369ms 26 May 2024 417th GrayJoKing 🇦🇺 837 75 3ms 2 Dec 2023 418th Shanethegamer 🇺🇸 837 87 128ms 1 Dec 2023 418th DialFrost 🇸🇬 837 87 126ms 6 Aug 2024 420th duckyluuk 🇳🇱 836 87 3,926ms 25 Oct 2024 420th sean-niemann 🇺🇸 836 87 3,383ms 30 Oct 2024 422nd Tavistock 835 83 8ms 13 Dec 2023 423rd pardouin 🇫🇷 834 50 51ms 9 Sep 2025 424th edsrzf 🇳🇿 833 114 28ms 25 Apr 2025 425th ovs-code 🇩🇪 832 65 140ms 4 Aug 2024 426th stefangimmillaro 830 82 106ms 30 Apr 2024 427th GrayJoKing 🇦🇺 829 96 80ms 4 Dec 2023 428th MeWhenI 🇻🇦 829 105 5ms 1 Dec 2023 429th saito-ta 🇯🇵 828 61 405ms 1 Dec 2023 429th retrohun 828 61 587ms 16 Jun 2024 431st GolfingSuccess 🇬🇷 828 66 9ms 13 Aug 2024 432nd Shanethegamer 🇺🇸 828 71 131ms 1 Dec 2023 433rd Yewzir 🇧🇪 828 103 58ms 26 May 2024 434th SirBogman 🇺🇸 827 81 40ms 3 Jun 2025 435th MeWhenI 🇻🇦 827 103 3ms 1 Dec 2023 436th MeWhenI 🇻🇦 827 227 15ms 20 Apr 2025 437th stefangimmillaro 826 88 3,864ms 10 Nov 2024 438th snoozingnewt 🇨🇦 826 97 122ms 18 days ago 439th MeWhenI 🇻🇦 826 115 25ms 1 Dec 2023 440th emgordon154 825 70 10ms 9 Mar 2025 441st nwellnhof 🇩🇪 825 77 19ms 12 Jan 2024 442nd SirBogman 🇺🇸 823 53 146ms 4 Dec 2023 443rd Shanethegamer 🇺🇸 823 76 126ms 1 Dec 2023 443rd MeWhenI 🇻🇦 823 76 118ms 1 Dec 2023 443rd edsrzf 🇳🇿 823 76 119ms 10 Jul 2025 446th CaedenHarper 🇨🇦 822 89 368ms 17 Oct 2025 447th sisyphus-ppcg 🇦🇺 821 28 78ms 1 Dec 2023 448th MeWhenI 🇻🇦 820 179 1,695ms 7 Nov 2025 448th Yewzir 🇧🇪 820 179 2,477ms 14 Nov 2025 450th DialFrost 🇸🇬 819 79 71ms 24 Mar 2025 451st stefangimmillaro 817 51 59ms 26 Apr 2024 451st Natanaelel 🇸🇪 817 51 43ms 24 Jan 2025 453rd alemelis 817 61 881ms 25 Feb 2024 454th sisyphus-ppcg 🇦🇺 817 79 2ms 5 Dec 2023 455th ovs-code 🇩🇪 815 77 2ms 15 Dec 2023 456th dirckvdende 815 78 11ms 28 Jul 2025 457th targrik 814 68 279ms 29 Jan 2025 458th MeWhenI 🇻🇦 813 70 721ms 15 Sep 2025 459th DialFrost 🇸🇬 812 92 5ms 14 Feb 2025 460th acotis 810 99 118ms 24 Mar 2025 461st GolfingSuccess 🇬🇷 809 67 2ms 16 Oct 2024 462nd MeWhenI 🇻🇦 808 78 41ms 4 Dec 2023 463rd MeWhenI 🇻🇦 808 90 4,188ms 24 Oct 2024 464th stefangimmillaro 807 83 39ms 26 Apr 2025 464th MeWhenI 🇻🇦 807 83 40ms 29 Apr 2025 466th btjones0 805 79 10ms 1 Dec 2023 466th BREMAUCY 🇫🇷 805 79 10ms 1 Dec 2023 466th namelessiw 805 79 10ms 5 Dec 2023 466th annaproxy 805 79 10ms 11 Dec 2023 466th OllieBoyne 🇬🇧 805 79 11ms 7 Jan 2024 466th nstearns96 🇬🇧 805 79 10ms 28 Jun 2024 466th FortuiteMan 🇫🇷 805 79 11ms 26 Sep 2024 466th lifthrasiir 🇰🇷 805 79 10ms 12 Nov 2024 466th bzijlema 🇳🇱 805 79 11ms 27 Nov 2024 466th plcc0 805 79 10ms 21 Mar 2025 466th bricknellj 805 79 11ms 2 Apr 2025 466th guilhem-roy 🇫🇷 805 79 11ms 29 May 2025 466th andrewjc2000 805 79 10ms 27 Jul 2025 466th qpwoeirut 805 79 10ms 10 Aug 2025 466th luuumine 🇫🇷 805 79 11ms 19 Nov 2025 First Prev 401–480 of 1,484 Next Last